Merge branch 'MihailRis:main' into main

dev/tests/io_stream.lua

@@ -0,0 +1,34 @@
+local device = file.create_memory_device()
+file.write(device..":test.txt", "Hello\nWorld")
+file.write_bytes(device..":test.bin", Bytearray({20, 30, 100, 200, 255}))
+
+local stream = file.open(device..":test.txt", 'r')
+
+local line1 = stream:read_line()
+local line2 = stream:read_line()
+
+assert(line1 == "Hello")
+assert(line2 == "World")
+
+local stream2 = file.open(device..":test.bin", 'rb')
+local data = stream2:read(5)
+assert(data[1] == 20)
+assert(data[2] == 30)
+assert(data[3] == 100)
+assert(data[4] == 200)
+assert(data[5] == 255)
+
+local stream3 = file.open(device..":test.txt", 'r')
+assert(stream3:is_alive())
+stream3:close()
+assert(not stream3:is_alive())
+
+local stream4 = file.open(device..":test.txt", 'r')
+stream4:seek('b', 6)
+local line = stream4:read_line()
+assert(line == "World")
+
+local stream5 = file.open(device..":test.txt", 'r')
+stream5:seek('e', 0)
+local pos = stream5:tell()
+assert(pos == 11)

doc/en/3d-text.md

@@ -4,14 +4,15 @@
 
 The appearance of 3D text, is configured via a table, like [particles](particles.md). All fields are optional.
 
-| Field           | Description                  | Default          |
+| Field           | Description                              | Default          |
-| --------------- | ---------------------------- | ---------------- |
+| --------------- | ---------------------------------------- | ---------------- |
-| display         | Display format               | static_billboard |
+| display         | Display format                           | static_billboard |
-| color           | Text color                   | {1, 1, 1, 1}     |
+| color           | Text color                               | {1, 1, 1, 1}     |
-| scale           | Text scale                   | 1                |
+| scale           | Text scale                               | 1                |
-| render_distance | Text rendering distance      | 32               |
+| render_distance | Text rendering distance                  | 32               |
-| xray_opacity    | Visibility through obstacles | 0                |
+| xray_opacity    | Visibility through obstacles             | 0                |
-| perspective     | Perspective coefficient      | 1                |
+| perspective     | Perspective coefficient                  | 1                |
+| font            | Font. If absent, the default one is used | ""               |
 
 Available display formats:
 

doc/en/block-properties.md

@@ -1,6 +1,6 @@
 # Block properties
 
-## Visual
+## Visual & Audio
 
 ### *texture*
 
@@ -70,6 +70,18 @@ Rotation profile (set of available block rotations and behaviour of placing bloc
 - "pane" - panels, doors, signs
 - "stairs" - "pane" + flipped variants
 
+### *particles*
+
+Particles are specified as a JSON object. Property names can be found [in the particles section](particles.md).
+
+When camera is near to the block, the engine will create an emitter that will run
+until the block is destroyed or the camera moves away a certain distance.
+
+### Material - *material*
+
+Defines the name of the block's material in the format `pack:material_name`, which affects the selection of block interaction sounds.
+Material definitions are located in /block_materials.
+
 ## Variants
 
 Some properties can vary dynamically, depending on the variant number stored in the user bits of the block.

doc/en/entity-properties.md

@@ -61,12 +61,16 @@ Determines how the physics engine will work with it.
 
 ### *blocking*
 
-Determines whether the entity blocks installation of blocks.
+If true - the entity blocks the placement of a block that intersects with the entity's hitbox.
 
 *In the future will also block other entities movement.*
 
 Default value: *true*.
 
+### *selectable*
+
+If set to `false` the cursor will ignore the entity, passing the ray.
+
 ### *sensors*
 
 A sensor is an area attached to a physical body that detects the entry of other bodies into it.

doc/en/rigging.md

@@ -38,7 +38,7 @@ Models are loaded automatically; adding them to preload.json is not required.
 
 ## Models
 
-Models should be located in the models folder. Currently only OBJ format is supported.
+Models must be located in the models folder. Currently, the following formats are supported: obj, vec3, and [vcm](vcm.md).
 
 >[!IMPORTANT]
 > When loading an obj model, the \*.mtl file is ignored.

doc/en/scripting.md

@@ -42,6 +42,7 @@ Subsections:
     - [utf8](scripting/builtins/libutf8.md)
     - [vec2, vec3, vec4](scripting/builtins/libvecn.md)
     - [world](scripting/builtins/libworld.md)
+- [Extensions for standard libraries](scripting/extensions.md)
 - [Module core:bit_converter](scripting/modules/core_bit_converter.md)
 - [Module core:data_buffer](scripting/modules/core_data_buffer.md)
 - [Module core:vector2, core:vector3](scripting/modules/core_vector2_vector3.md)

doc/en/scripting/builtins/libapp.md

@@ -180,14 +180,34 @@ app.get_content_sources() -> table<string>
 
 Returns a list of content sources (paths), in descending priority order.
 
-``lua
+```lua
 app.set_content_sources(sources: table<string>)
 ```
 
 Sets a list of content sources (paths). Specified in descending priority order.
 
-``lua
+```lua
 app.reset_content_sources()
 ```
 
 Resets content sources.
+
+## Sub-instances
+
+```lua
+-- Creates a headless engine instance with the current project and the specified application script.
+-- Returns the instance ID. The number of active sub-instances is currently limited to one.
+app.start_background_instance(
+    -- script file
+    app_script: string,
+    -- log file
+    output_file: string | nil
+) -> int
+
+-- Checks if the engine sub-instance is alive.
+app.is_instance_alive(handle: int) -> boolean
+
+-- Stops the engine sub-instance.
+-- Returns true if the instance was alive at the time of the call.
+app.terminate(handle: int) -> boolean
+```

doc/en/scripting/builtins/libblock.md

@@ -28,7 +28,8 @@ block.get(x: int, y: int, z: int) -> int
 block.get_states(x: int, y: int, z: int) -> int
 
 -- Set block with given integer ID and state (default - 0) at given position.
-block.set(x: int, y: int, z: int, id: int, states: int)
+-- If noupdate=true is passed, the `on_update` event will not be called for adjacent blocks.
+block.set(x: int, y: int, z: int, id: int, states: int, noupdate: boolean=false)
 
 -- Places a block with a given integer id and state (default - 0) at given position.
 -- on behalf of the player, calling the on_placed event.

doc/en/scripting/builtins/libworld.md

@@ -92,6 +92,8 @@ world.raycast(
         -- exclusion filtering mode:
         --   if true, filter_entities defines the list of ignored entity types
         entities_exclusion: bool = false,
+        -- include entities with selectable=false
+        nonselect_entities: bool = false;
 
         [==[ additional parameters (blocks) ]==]
         -- id of the block types used for filtering

doc/en/scripting/extensions.md

@@ -0,0 +1,204 @@
+# Standard Library Extensions
+
+The **stdmin.lua** kernel script defines functions that extend and complement some of the standard **Lua** libraries.
+
+## Contents:
+- [table extensions](#table-extensions)
+- [string extensions](#string-extensions)
+- [math extensions](#math-extensions)
+- [bit extensions](#bit-extensions)
+- [additional global functions](#additional-global-functions)
+
+## Table Extensions
+```lua
+-- Creates and returns a copy of the given table by creating a new one and copying all elements from the given table into it.
+table.copy(t: table) -> table
+
+-- The deep copy function creates a full copy of the source table, including all its subtables. 
+table.deep_copy(t: table) -> table
+
+-- Returns the number of pairs in the given table.
+table.count_pairs(t: table) -> int
+
+-- Returns one element from the given table at a random position.
+table.random(t: table) -> any
+
+-- Returns true if x is contained in t.
+table.has(t: table, x: any) -> boolean
+
+-- Returns the index of x in t. If the given object is not contained in the table, the function returns -1.
+table.index(t: table, x: any) -> int
+
+-- Removes element x from t.
+table.remove_value(t: table, x: any)
+
+-- Shuffles values ​​in the table.
+table.shuffle(t: table) -> table
+
+-- Adds values ​​from table t2 to table t1. If table t2 contains a key from t1, the key's value will not be changed.
+table.merge(t1: table, t2: table) -> table
+
+-- Iterates through the table and applies a func to all its elements, returning the new value of the element.
+table.map(t: table, func: function(indx, value)) -> table
+
+-- Iterates through the table using a func that returns true if the element should be kept and false if it should be deleted.
+table.filter(t: table, func: function(indx, value)) -> table
+
+-- Allows you to safely retrieve the value for the specified key. If the key exists in the table, the method will return its value.
+-- If the key is missing, the method will set it to the default value and return it.
+table.set_default(t: table, key: int | string, default: any) -> any
+
+-- Returns a "flattened" version of the original table.
+table.flat(t: table) -> table
+
+-- Returns a deep "flat" version of the original table.
+table.deep_flat(t: table) -> table
+
+-- Returns a truncated version of the table from index start to index stop, inclusive. Key-value pairs
+-- are not preserved in the new table. For nil values, the value starts at 1 and ends at #arr, respectively.
+table.sub(arr: table, start: number | nil, stop: number | nil) -> table
+
+-- Adds a value to the table only if it was not originally there.
+table.insert_unique(t: table, val: any)
+table.insert_unique(t: table, pos: int, val: any)
+
+-- Returns a table containing all keys of the given table, including numeric ones. table.keys(t: table) -> table
+
+-- Adds all key-value pairs from table extension to table t. If a key from t is present in extension, its value will be overwritten.
+table.extend(t: table, extension: table) -> table
+
+-- Converts the passed table to a string.
+table.tostring(t: table) -> string
+```
+
+## String extensions
+
+It's important to note that all of the functions listed below that extend **string** can be used as meta-methods on string instances, i.e.:
+
+```lua
+local str = "ABA str BAB"
+
+if str:starts_with("ABA") and str:ends_with("BAB") then
+print(str:replace("BA", "DC"))
+end
+```
+
+```lua
+-- Splits the string into parts based on the specified separator/expression and returns the result as a table of strings. If withpattern is true, the separator parameter will be evaluated as a regular expression. string.explode(separator: string, str: string, withpattern: boolean) -> table<string>
+
+-- Splits the string into parts based on the specified delimiter and returns the result as a table of strings.
+string.split(str: string, delimiter: string) -> table<string>
+
+-- Escapes special characters in the string, such as `()[]+-.$%^?*`, into `%character` format. The `NUL` character (`\0`) will be converted to `%z`.
+string.pattern_safe(str: string) -> string
+
+-- Splits seconds into hours, minutes, and milliseconds and formats them using the following parameter order: `minutes, seconds, milliseconds`, and then returns the result. If format is not specified, it returns a table where:
+-- h - hours,
+-- m - minutes,
+-- s - seconds,
+-- ms - milliseconds.
+string.formatted_time(seconds: number, format: string) -> string | table
+
+-- Replaces all substrings in str equal to tofind with toreplace and returns a string with all the modified substrings.
+string.replace(str: string, tofind: string, toreplace: string) -> string
+
+-- Removes all characters equal to char from the string from the left and right ends and returns the result.
+-- If the char parameter is undefined, all empty characters will be selected.
+string.trim(str: string, char: string) -> string
+
+-- Removes all characters equal to char from the string from the left end and returns the result.
+-- If the char parameter is undefined, all empty characters will be selected.
+string.trim_left(str: string, char: string) -> string
+
+-- Removes all characters equal to char from the right end of the string and returns the result.
+-- If the char parameter is undefined, all empty characters will be selected.
+string.trim_right(str: string, char: string) -> string
+
+-- Returns true if the string begins with the substring start.
+string.starts_with(str: string, start: string) -> boolean
+
+-- Returns true if the string ends with the substring endStr.
+string.ends_with(str: string, endStr: string) -> boolean
+
+-- The string.lower and string.upper functions are also overridden by utf8.lower and utf8.upper.
+
+-- Escapes a string. It is an alias for utf8.escape.
+string.escape(str: string) -> string
+
+-- Escapes special XML characters. An alias for utf8.escape_xml.
+string.escape_xml(text: string) -> string
+
+-- Adds a char to the left and right of the string until its size equals size.
+-- By default, char is equal to the space character.
+string.pad(str: string, size: int, char: string) -> string
+
+-- Adds a char to the left of the string until its size equals size.
+-- By default, char is equal to the space character.
+string.left_pad(str: string, size: int, char: string) -> string
+
+-- Adds a char to the right of the string until its size equals size.
+-- By default, char is equal to the space character.
+string.right_pad(str: string, size: int, char: string) -> string
+```
+
+## Math extensions
+
+```lua
+-- Returns _in if it is in the range low <= _in <= high
+-- Otherwise, returns the boundary to which _in is closest.
+math.clamp(_in: number, low: number, high: number) -> number
+
+-- Returns a random fractional number in the range low to high.
+math.rand(low: number, high: number) -> number
+
+-- Returns the normalized value of num relative to conf.
+math.normalize(num: number, [optional] conf: number) -> number
+
+-- Returns the rounded value of num to the specified number of decimal places.
+math.round(num: number, [optional] places: number) -> number
+
+-- Returns the sum of all received arguments. If a table was passed as an argument, the method will return the sum of all its elements.
+math.sum(x: number, ... | t: table) -> number
+
+```
+
+## Bit extensions
+```lua
+
+-- Common arguments:
+-- * expr: A string containing a bitwise expression, conforming to the Lua 5.3 bitwise operations format
+-- * args: A list of names of the expression arguments. If nil, the list is automatically generated based on the detected identifiers.
+
+- Compiles the function to perform bitwise operations
+-- * asFunction: If true, returns the function; otherwise, returns a string of function code
+bit.compile(expr: string, args: table | nil, asFunction: boolean=true) -> function | string
+
+-- Compiles the function to perform bitwise operations and executes it in place
+-- * ...: Values ​​to be passed to the compiled function. bit.execute(expr: string, args: table | nil, ...) -> number
+```
+## Additional Global Functions
+
+This script also defines other global functions that are available for use. Their list is below.
+
+```lua
+-- Returns true if the passed table is an array, that is, if each key is an integer greater than or equal to one
+-- and if each key follows the previous one.
+is_array(x: table) -> boolean
+
+-- Splits the path into two parts and returns them: the entry point and the file path.
+parse_path(path: string) -> string, string
+
+-- Calls the function func iters times, passing it the arguments ..., and then prints to the console the time in microseconds that has elapsed
+-- since the call to timeit. timeit(iters: int, func: function, ...)
+
+-- Causes the coroutine to pause until the number of seconds specified in timesec has elapsed.
+-- The function can only be used inside a coroutine.
+sleep(timesec: number)
+
+-- Waits for the passed coroutine to complete, returning the control flow. The function can only be used inside a coroutine.
+-- Returns values ​​similar to those returned by pcall.
+await(co: coroutine) -> result, error
+
+-- A constant storing the PID of the current engine instance.
+os.pid -> number
+```

doc/ru/3d-text.md

@@ -12,6 +12,7 @@
 | render_distance | Дистанция отрисовки текста                              | 32                |
 | xray_opacity    | Коэффициент видимости через препятствия (просвечивание) | 0                 |
 | perspective     | Коэффициент перспективы                                 | 1                 |
+| font            | Шрифт. При отсутствии используется основной             | ""                |
 
 Доступные форматы отображения:
 

doc/ru/block-properties.md

@@ -1,6 +1,6 @@
 # Свойства блоков
 
-## Вид
+## Вид & Звук
 
 ### Текстура - *texture*
 
@@ -78,6 +78,11 @@
 При приближении к блоку движок создаст эмиттер, который будет работать 
 до разрушения блока или отдаления камеры на некоторое расстояние.
 
+### Материал - *material*
+
+Определяет имя материала блока в формате `пак:имя_материала`, что влияет на выбор звуков взаимодействия с блоком.
+Определения материалов расположены в /block_materials.
+
 ## Варианты
 
 Некоторые свойства могут варьироваться динамически, в зависимости от номера варианта, хранимого в пользовательских битах блока.

doc/ru/entity-properties.md

@@ -61,12 +61,16 @@
 
 ### Блокирование - *blocking*
 
-Определяет блокирует ли сущность установку блоков.
+Определяет, блокирует ли сущность установку блока, пересекающегося с хитбоксом сущности.
 
 *В будущем будет также блокировать движение других сущностей.*
 
 Значение по-умолчанию: *true*.
 
+### Выделяемость - *selectable*
+
+При значении в `false` курсор будет игнорировать cущность, пропуская луч далее.
+
 ### Список сенсоров - *sensors*
 
 Сенсор - область пространства, привязанная к физическому телу, детектирующее попадание в него других тел.

doc/ru/rigging.md

@@ -38,7 +38,7 @@
 
 ## Модели
 
-Модели должны располагаться в папке models. На данный момент поддерживается только OBJ формат.
+Модели должны располагаться в папке models. На данный момент поддерживаются форматы: obj, vec3 и [vcm](vcm.md).
 
 >[!IMPORTANT]
 > При загрузке obj модели игнорируется файл \*.mtl. 

doc/ru/scripting/builtins/libapp.md

@@ -142,4 +142,24 @@ app.set_content_sources(sources: table<string>)
 
 -- Сбрасывает список источников контента.
 app.reset_content_sources()
-```
+```
+
+## Под-экземпляры
+
+```lua
+-- Создаёт headless-экземпляр движка с текущим проектом и указанным сценарием.
+-- Возвращает id экземпляра. Число живых под-экземпляров, на данный момент, ограничено одним.
+app.start_background_instance(
+    -- файл сценария
+    app_script: string,
+    -- файл лога
+    output_file: string | nil
+) -> int
+
+-- Проверяет, жив ли под-экземпляр движка.
+app.is_instance_alive(handle: int) -> boolean
+
+-- Останавливает под-экземпляр движка.
+-- Возвращает true если экземпляр был жив в момент вызова.
+app.terminate_instance(handle: int) -> boolean
+```

doc/ru/scripting/builtins/libnetwork.md

@@ -92,6 +92,11 @@ socket:recv_async(
     [опционально] usetable: boolean=false
 ) -> nil|table|Bytearray
 
+-- Оборачивает сокет в io_stream (см. ../io_stream.md)
+socket:as_stream(
+    [опционально] binary_mode: boolean=true
+) -> io_stream
+
 -- Закрывает соединение
 socket:close()
 

doc/ru/scripting/builtins/libworld.md

@@ -91,6 +91,8 @@ world.raycast(
         -- исключающий режим фильтрации:
         --   при значении (true) filter_entities определяет список игнорируемых
         entities_exclusion: bool = false,
+        -- учитывать сущности с selectable=false
+        nonselect_entities: bool = false;
         
         [==[ дополнительные параметры (блоки) ]==]
         -- id типов блоков используемых для фильтрации

doc/ru/scripting/extensions.md

@@ -7,7 +7,7 @@
 - [расширения для string](#расширения-для-string) 
 - [расширения для math](#расширения-для-math)
 - [расширения для bit](#расширения-для-bit)
-- [Дополнительные глобальные функции](#дополнительные-глобальные-функции)
+- [дополнительные глобальные функции](#дополнительные-глобальные-функции)
 
 ## Расширения для table
 ```lua
@@ -62,6 +62,12 @@ table.sub(arr: table, start: number | nil, stop: number | nil) -> table
 table.insert_unique(t: table, val: any)
 table.insert_unique(t: table, pos: int, val: any)
 
+-- Возвращает таблицу, содержащую все ключи переданной таблицы, включая числовые.
+table.keys(t: table) -> table
+
+-- Добавляет в таблицу t все пары ключ-значение из таблицы extension, при этом если в extension присутствует ключ из t, то его значение будет перезаписано.
+table.extend(t: table, extension: table) -> table
+
 -- Конвертирует переданную таблицу в строку.
 table.tostring(t: table) -> string
 ```
@@ -158,6 +164,12 @@ math.sum(x: number, ... | t: table) -> number
 
 -- Возвращает целое число, указывающее знак числа (-1/0/1)
 math.sign(x: number) -> int
+
+-- Одномерный шум с значениями в диапазоне [-1..1].
+math.noise(x: number, [опционально] octaves: int = 1) -> number
+
+-- Двумерный шум с значениями в диапазоне [-1..1].
+math.noise2d(x: number, y: number [опционально] octaves: int = 1) -> number
 ```
 
 ## Расширения для bit

doc/ru/scripting/io_stream.md

@@ -18,7 +18,7 @@
 Поток имеет три различных вида режима:
 - Режим общего поведения (`general` / `mode`)
 
-- Режим сброса (`flush` / `flushMode`)
+- Режим сброса (`flush` / `flush_mode`)
 
 - Двоичный режим (`binary`)
 
@@ -27,34 +27,34 @@
 Определяет, как поток обрабатывает чтение и запись,
 имеет три подрежима:
 
-| Режим         | Описание |
+| Режим         | Описание                                                                                                                                        |
-|---------------|--------|
+|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------|
-| `"default"`   | Прямой режим. `read` может вернуть меньше байт, чем запрошено. `write` сразу отправляет данные в низкоуровневый дескриптор. Нет буферизации. |
+| `"default"`   | Прямой режим. `read` может вернуть меньше байт, чем запрошено. `write` сразу отправляет данные в низкоуровневый дескриптор. Нет буферизации.    |
 | `"yield"`     | Как `default`, но при нехватке данных в `read(n)` поток будет вызывать `coroutine.yield()`, пока не соберёт ровно `n` байт. Удобно для корутин. |
-| `"buffered"`  | Включает внутренние буферы чтения и записи. `read` берёт данные из буфера, `write` — складывает в буфер. При превышении `maxBufferSize` — ошибка `buffer overflow`. |
+| `"buffered"`  | Включает внутренние буферы чтения и записи. `read` берёт данные из буфера , `write` — складывает в буфер.                                       |
 
 ### flush
 
 Работает только в режиме `"buffered"`, 
 имеет два подрежима:
 
-| Режим            | Что делает `flush()` |
+| Режим                  | Что делает `flush()`                                                                                |
-|------------------|----------------------|
+|------------------------|-----------------------------------------------------------------------------------------------------|
-| `"all"` (по умолчанию)     | Сначала сбрасывает буфер записи → низкоуровневый `write`, затем вызывает `ioLib.flush(descriptor)` |
+| `"all"` (по умолчанию) | Сначала сбрасывает буфер записи → низкоуровневый `write`, затем вызывает `io_lib.flush(descriptor)` |
-| `"buffer"`                  | Сбрасывает только буфер записи, без вызова системного `flush` |
+| `"buffer"`             | Сбрасывает только буфер записи, без вызова системного `flush`                                       |
 
 
 ### binary
 **Независимый флаг** (включается через `set_binary_mode(true)` или при создании потока).  
 Определяет, в каком виде методы `read` и `write` принимают и возвращают данные:
 
-| binary = true                           | binary = false (по умолчанию)         |
+| binary = true                                              | binary = false (по умолчанию)          |
-|-----------------------------------------|----------------------------------------|
+|------------------------------------------------------------|----------------------------------------|
 | Данные — это **байты** (`Bytearray`, таблица чисел 0..255) | Данные — это **текстовые строки**      |
-| `read(n)` → `Bytearray` или `table<number>`| `read()` → одна строка                 |
+| `read(n)` → `Bytearray` или `table<int>`                   | `read()` → одна строка                 |
-| `read("i4 f")` → распаковка через `byteutil.unpack` | `read(n)` → n строк в таблице       |
+| `read("i4 f")` → распаковка через `byteutil.unpack`        | `read(n)` → n строк в таблице          |
-| `write(Bytearray)` → запись байтов      | `write("hello")` → строка + `\n`       |
+| `write(Bytearray)` → запись байтов                         | `write("hello")` → строка + `\n`       |
-| `write("i4", 42)` → `byteutil.pack`     | `write({"a","b"})` → две строки с `\n`|
+| `write("i4", 42)` → `byteutil.pack`                        | `write({"a","b"})` → две строки с `\n` |
 
 `read_line` / `write_line` — работают как в текстовом режиме
 
@@ -90,25 +90,25 @@ io_stream:set_flush_mode(string)
 --[[
 Читает данные из потока
 В двоичном режиме:
-    Если arg - number, то читает из потока arg байт и возвращает ввиде Bytearray или таблицы, если useTable = true
+    Если arg - int, то читает из потока arg байт и возвращает ввиде Bytearray или таблицы, если use_table = true
 
     Если arg - string, то функция интерпретирует arg как шаблон для byteutil. Прочитает кол-во байт, которое определено шаблоном, передаст их в byteutil.unpack и вернёт результат
 В текстовом режиме:
-    Если arg - number, то читает нужное кол-во строк с окончанием CRLF/LF из arg и возвращает ввиде таблицы. Также, если trimEmptyLines = true, то удаляет пустые строки с начала и конца из итоговой таблицы
+    Если arg - int, то читает нужное кол-во строк с окончанием CRLF/LF из arg и возвращает ввиде таблицы. Также, если trim_empty_lines = true, то удаляет пустые строки с начала и конца из итоговой таблицы
 
     Если arg не определён, то читает одну строку с окончанием CRLF/LF и возвращает её.
 --]]
 io_stream:read(
-    [опционально] arg: number | string,
+    [опционально] arg: int | string,
-    [опционально] useTable | trimEmptyLines: boolean
+    [опционально] use_table = false | trim_empty_lines = true: boolean
-) -> Bytearray | table<number> | string | table<string> | ...
+) -> Bytearray | table<int> | string | table<string> | ...
 
 --[[
 Записывает данные в поток
 В двоичном режиме:
     Если arg - string, то функция интерпретирует arg как шаблон для byteutil, передаст его и ... в byteutil.pack и результат запишет в поток
 
-    Если arg - Bytearray | table<number>, то записывает байты в поток
+    Если arg - Bytearray | table<int>, то записывает байты в поток
 
 В текстовом режиме:
     Если arg - string, то записывает строку в поток (вместе с окончанием LF)
@@ -116,7 +116,7 @@ io_stream:read(
     Если arg - table<string>, то записывает каждую строку из таблицы отдельно
 --]]
 io_stream:write(
-    arg: Bytearray | table<number> | string | table<string>,
+    arg: Bytearray | table<int> | string | table<string>,
     [опционально] ...
 )
 
@@ -128,53 +128,59 @@ io_stream:write_line(string)
 
 --[[
 В двоичном режиме:
-    Читает все доступные байты из потока и возвращает ввиде Bytearray или table<number>, если useTable = true
+    Читает все доступные байты из потока и возвращает ввиде Bytearray или table<int>, если use_table = true
 
 В текстовом режиме:
-    Читает все доступные строки из потока в table<string> если useTable = true, или в одну строку вместе с окончаниями, если нет
+    Читает все доступные строки из потока в table<string> если use_table = true, или в одну строку вместе с окончаниями, если нет
 
 --]]
 io_stream:read_fully(
-    [опционально] useTable: boolean
+    [опционально] use_table: boolean
-) -> Bytearray | table<number> | table<string> | string
+) -> Bytearray | table<int> | table<string> | string
 
 --[[
-Устанавливает позицию в потоке
+Если length определён, то возвращает true, если length байт доступно к чтению. Иначе возвращает false.
+
+Если не определён, то возвращает количество байт, которое можно прочитать.
+
+В не буферизированном режиме потока может всегда возвращать 0 или false, если поток не поддерживает available.
+--]]
+io_stream:available(
+    [опционально] length: int
+) -> int | boolean
+
+--[[
+Устанавливает позицию в потоке (всегда в байтах)
 Режимы:
     b - Задаёт позицию относительно начало файла
     c - Задаёт позицию относительно текущей позиции
     e - Задаёт позицию относительно конца файла
+    
+Может бросать ошибку, если поток не поддерживает seek.
 --]]
 io_stream:seek(
     mode: string
-    offset: number
+    offset: int
 )
+
+-- Возвращает текущую позицию в потоке от начала.
+-- Может бросать ошибку, если поток не поддерживает tell.
+io_stream:tell() -> int
 ```
 
 ## Методы Buffered-режима
 
 ```lua
---[[
-Если length определён, то возвращает true, если length байт доступно к чтению. Иначе возвращает false
-
-Если не определён, то возвращает количество байт, которое можно прочитать
-
---]]
-io_stream:available(
-    [опционально] length: number
-) -> number | boolean
-
 -- Возвращает максимальный размер буферов
-io_stream:get_max_buffer_size() -> number
+io_stream:get_max_buffer_size() -> int
 
 -- Задаёт новый максимальный размер буферов
-io_stream:set_max_buffer_size(max_size: number)
+io_stream:set_max_buffer_size(max_size: int)
 ```
 
 ## Методы контроля состояния потока
 
 ```lua
-
 -- Возвращает true, если поток открыт на данный момент
 io_stream:is_alive() -> bool
 
@@ -185,16 +191,27 @@ io_stream:is_closed() -> bool
 io_stream:close()
 
 -- Записывает все данные из write-буфера в поток в buffer/all flush-режимах
--- Вызывает ioLib.flush() в all flush-режиме
+-- Вызывает ioLib.flush() в all flush-режиме, или ничего не делает, если
+-- ioLib не поддерживает flush.
 io_stream:flush()
 
+-- Создаёт новый поток из Bytearray.
+-- Может использоваться одновременно как для чтения, так и для записи.
+-- Результат записи будет записан в тот же Bytearray, что был передан в функцию.
+io_stream.wrap_bytearray(
+  buffer: Bytearray,
+  
+  -- по-умолчанию равен true, поскольку функция из вводных аргументов
+  -- будет использоваться преимущественно для работы с двоичными данными.
+  [опционально] binary_mode: boolean = true
+ ) -> io_stream
 
 -- Создаёт новый поток с переданным дескриптором и использующим переданную I/O библиотеку. (Более подробно в core:io_stream.lua)
 io_stream.new(
     descriptor: int,
-    binaryMode: bool,
+    binary_mode: boolean,
-    ioLib: table,
+    io_lib: table,
     [опционально] mode: string = "default",
-    [опционально] flushMode: string = "all"
+    [опционально] flush_mode: string = "all"
 ) -> io_stream
 ```

res/content/base/config/defaults.toml

@@ -1,3 +1,4 @@
 generator = "base:demo"
 player-entity = "base:player"
 hand-skeleton = "base:hand"
+block-material = "base:stone"

res/content/base/modules/util.lua

@@ -12,14 +12,14 @@ function util.drop(ppos, itemid, count, data, pickup_delay)
     }})
 end
 
-local function calc_loot(loot_table)
+function util.calc_loot(loot_table)
     local results = {}
     for _, loot in ipairs(loot_table) do
         local chance = loot.chance or 1
         local count = loot.count or 1
-        
+
         local roll = math.random()
-        
+
         if roll < chance then
             if loot.min and loot.max then
                 count = math.random(loot.min, loot.max)
@@ -37,7 +37,7 @@ end
 function util.block_loot(blockid)
     local lootscheme = block.properties[blockid]["base:loot"]
     if lootscheme then
-        return calc_loot(lootscheme)
+        return util.calc_loot(lootscheme)
     end
     return {{item=block.get_picking_item(blockid), count=1}}
 end

res/content/base/scripts/components/drop.lua

@@ -10,7 +10,7 @@ dropitem = ARGS
 if dropitem.item then
     dropitem.id = item.index(dropitem.item)
 end
-if dropitem then 
+if dropitem then
     timer = dropitem.pickup_delay or timer
 end
 if SAVED_DATA.item then
@@ -26,6 +26,7 @@ function on_save()
 end
 
 if vc.is_client() then
+    local SCALE = 0.3
     local scale = {1, 1, 1}
     local rotation = mat4.rotate({
         math.random(), math.random(), math.random()
@@ -35,7 +36,7 @@ if vc.is_client() then
         local matrix = mat4.idt()
         rig:set_model(0, item.model_name(dropitem.id))
         local bodysize = math.min(scale[1], scale[2], scale[3])
-        body:set_size({scale[1], bodysize, scale[3]})
+        body:set_size(vec3.mul({scale[1], bodysize, scale[3]}, SCALE))
         mat4.mul(matrix, rotation, matrix)
         mat4.scale(matrix, scale, matrix)
         rig:set_matrix(0, matrix)

res/content/base/scripts/grass_block.lua

@@ -1,3 +1,6 @@
+local dirtid = block.index("base:dirt")
+local grass_blockid = block.index("base:grass_block")
+
 local offsets = {}
 for lx=-1,1 do
     for ly=-1,1 do
@@ -8,18 +11,17 @@ for lx=-1,1 do
 end
 
 function on_random_update(x, y, z)
-    local dirtid = block.index('base:dirt');
     if block.is_solid_at(x, y+1, z) then
         block.set(x, y, z, dirtid, 0)
         return
     end
-    local grassblockid = block.index('base:grass_block')
+
     for _, offset in ipairs(offsets) do
         local nx, ny, nz = x + offset[1], y + offset[2], z + offset[3]
 
         if block.get(nx, ny, nz) == dirtid and
         not block.is_solid_at(nx, ny + 1, nz) then
-            block.set(nx, ny, nz, grassblockid, 0)
+            block.set(nx, ny, nz, grass_blockid, 0)
             return
         end
     end

res/layouts/ingame_chat.xml.lua

@@ -19,7 +19,7 @@ local function update_line(line, uptime)
     end
 end
 
-events.on("core:chat", function(message)
+local core_chat_handler = events.on("core:chat", function(message)
     while #lines >= max_lines do
         document[lines[1][1]]:destruct()
         table.remove(lines, 1)
@@ -36,7 +36,7 @@ end)
 function on_open()
     if not initialized then
         initialized = true
-        
+
         document.root:setInterval(1/animation_fps * 1000, function ()
             local uptime = time.uptime()
             for _, line in ipairs(lines) do
@@ -52,3 +52,7 @@ function on_open()
         end)
     end
 end
+
+function on_destroy()
+    events.remove("core:chat", core_chat_handler)
+end

res/layouts/pages/content.xml.lua

@@ -3,6 +3,7 @@ function on_open(params)
         mode = params.mode
     end
     refresh()
+    document.search_textbox.focused = true
 end
 
 -- add - packs to be added to the world (after apply)
@@ -178,40 +179,40 @@ function place_pack(panel, packinfo, callback, position_func)
     end
 end
 
-local Version = {};
+local Version = {}
 
 function Version.matches_pattern(version)
-    for _, letter in string.gmatch(version, "%.+") do
+    local t = string.split(version, ".")
-        if type(letter) ~= "number" or letter ~= "." then
+    if #t ~= 2 and #t ~= 3 then return false end
-            return false;
-        end
 
-        local t = string.split(version, ".");
+    for i = 1, #t do
-
+        local matched = string.match(t[i], "^%d+$")
-        return #t == 2 or #t == 3;
+        if not matched then return false end
     end
+
+    return true
 end
 
 function Version.__equal(ver1, ver2)
-    return ver1[1] == ver2[1] and ver1[2] == ver2[2] and ver1[3] == ver2[3];
+    return ver1[1] == ver2[1] and ver1[2] == ver2[2] and ver1[3] == ver2[3]
 end
 
 function Version.__greater(ver1, ver2)
-    if ver1[1] ~= ver2[1] then return ver1[1] > ver2[1] end;
+    if ver1[1] ~= ver2[1] then return ver1[1] > ver2[1] end
-    if ver1[2] ~= ver2[2] then return ver1[2] > ver2[2] end;
+    if ver1[2] ~= ver2[2] then return ver1[2] > ver2[2] end
-    return ver1[3] > ver2[3];
+    return ver1[3] > ver2[3]
 end
 
 function Version.__less(ver1, ver2)
-    return Version.__greater(ver2, ver1);
+    return Version.__greater(ver2, ver1)
 end
 
 function Version.__greater_or_equal(ver1, ver2)
-    return not Version.__less(ver1, ver2);
+    return not Version.__less(ver2, ver1)
 end
 
 function Version.__less_or_equal(ver1, ver2)
-    return not Version.__greater(ver1, ver2);
+    return not Version.__greater(ver1, ver2)
 end
 
 Version.operators = {
@@ -223,40 +224,39 @@ Version.operators = {
 }
 
 function Version.compare(op, ver1, ver2)
-    ver1 = string.split(ver1, ".");
+    ver1 = string.split(ver1, ".")
-    ver2 = string.split(ver2, ".");
+    ver2 = string.split(ver2, ".")
 
     local comparison_func = Version.operators[op];
 
     if comparison_func then
-        return comparison_func(ver1, ver2);
+        return comparison_func(ver1, ver2)
     else
-        return false;
+        return false
     end
 end
 
 function Version.parse(version)
-    local op = string.sub(version, 1, 2);
+    local op = string.sub(version, 1, 2)
     if op == ">=" or op == "<=" then
-        return op, string.sub(version, #op + 1);
+        return op, string.sub(version, #op + 1)
     end
 
     op = string.sub(version, 1, 1);
     if op == ">" or op == "<" then
-        return op, string.sub(version, #op + 1);
+        return op, string.sub(version, #op + 1)
     end
 
-    return "=", version;
+    return "=", version
 end
 
-local function compare_version(dependent_version, actual_version)
+local function compare_version(op, dependent_version, actual_version)
     if Version.matches_pattern(dependent_version) and Version.matches_pattern(actual_version) then
-        local op, dep_ver = Version.parse_version(dependent_version);
+        return Version.compare(op, dep_ver, actual_version)
-        Version.compare(op, dep_ver, actual_version);
     elseif dependent_version == "*" or dependent_version == actual_version then
-        return true;
+        return true
     else
-        return false;
+        return false
     end
 end
 
@@ -276,15 +276,15 @@ function check_dependencies(packinfo)
             )
         end
 
-        local dep_pack = pack.get_info(depid);
+        local dep_pack = pack.get_info(depid)
-        
+        local op, ver = Version.parse(depver)
-        if not compare_version(depver, dep_pack.version) then
+
-            local op, ver = Version.parse(depver)
+        if not compare_version(op, ver, dep_pack.version) then
             return string.format(
                 "%s: %s != %s (%s)",
                 gui.str("error.dependency-version-not-met"),
                 dep_pack.version, ver, depid
-            );
+            )
         end
 
         if table.has(packs_installed, packinfo.id) then

res/layouts/pages/new_world.xml

@@ -11,7 +11,7 @@
         @World generator
     </button>
     <button id='content_btn' onclick='save_state() menu.page="content"'/>
-    <button onclick='create_world()' margin='1,20,1,1'>
+    <button onclick='create_world()' margin='0,20,0,1'>
         @Create World
     </button>
     <button onclick='menu:back()'>@Back</button>

res/modules/internal/debugging.lua

@@ -148,3 +148,29 @@ function error(message, level)
     end
     __error(message, level)
 end
+
+local LoggerClass = {
+    __index = {
+        info = function (self, text)
+            debug.log(string.format("[%s] %s", self.name, text))
+        end,
+        warning = function (self, text)
+            debug.warning(string.format("[%s] %s", self.name, text))
+        end,
+        error = function (self, text)
+            debug.error(string.format("[%s] %s", self.name, text))
+        end
+    }
+}
+
+local _getinfo = debug.getinfo
+
+function debug.Logger(name)
+    if not name then
+        local source = _getinfo(2, "S").source
+        name = file.remove_ext(source)
+    else
+        name = string.format("%s:%s", file.prefix(_getinfo(2, "S").source), name)
+    end
+    return setmetatable({name=name}, LoggerClass)
+end

res/modules/internal/events.lua

@@ -14,6 +14,7 @@ function events.on(event, func)
         events.handlers[event] = {}
     end
     table.insert(events.handlers[event], func)
+    return func
 end
 
 function events.reset(event, func)
@@ -24,6 +25,14 @@ function events.reset(event, func)
     end
 end
 
+function events.remove(event, handler)
+    local handlers = events.handlers[event]
+    if not handlers then
+        return
+    end
+    table.remove_value(handlers, handler)
+end
+
 function events.remove_by_prefix(prefix)
     for name, handlers in pairs(events.handlers) do
         local actualname = name

res/modules/internal/extensions/file.lua

@@ -23,6 +23,10 @@ function file.parent(path)
     return dir
 end
 
+function file.remove_ext(path)
+    return string.format("%s/%s", file.parent(path), file.stem(path))
+end
+
 function file.path(path)
     local pos = path:find(':')
     return path:sub(pos + 1)

res/modules/internal/extensions/math.lua

@@ -39,3 +39,85 @@ end
 function math.sign(x)
     return (x > 0) and 1 or (x < 0 and -1 or 0)
 end
+
+local noise_period = 3021
+local noise_rands = {}
+
+for i=1,noise_period do
+    table.insert(noise_rands, math.random() * 2.0 - 1.0)
+end
+
+local function smoothstep(t)
+    return t * t * (3 - 2 * t)
+end
+
+local function sample_noise(x)
+    x = x % noise_period
+    local left_cell = math.floor(x)
+    local right_cell = (left_cell + 1) % noise_period
+    local t = smoothstep(x - left_cell)
+    return noise_rands[left_cell + 1] * (1.0 - t)
+        + noise_rands[right_cell + 1] * t
+end
+
+function math.noise(x, octaves)
+    x = math.abs(x)
+    octaves = octaves or 1
+    local value = 0.0
+    local mul = 1.0
+    for i=1,octaves do
+        value = value * (1.0 - mul) + sample_noise(x + 37 * i) * mul
+        x = x * 2.0
+        mul = mul * 0.5
+    end
+    return value
+end
+
+local function lerp(a, b, t)
+    return a + (b - a) * t
+end
+
+local function rand_2d(x, y)
+    return noise_rands[math.floor(x * 317 + y) % noise_period + 1]
+end
+
+local function sample_noise2d(x, y)
+    x = math.abs(x)
+    y = math.abs(y)
+
+    local x0 = math.floor(x)
+    local y0 = math.floor(y)
+    local x1 = x0 + 1
+    local y1 = y0 + 1
+
+    local tx = x - x0
+    local ty = y - y0
+
+    local sx = smoothstep(tx)
+    local sy = smoothstep(ty)
+
+    local c00 = rand_2d(x0, y0)
+    local c10 = rand_2d(x1, y0)
+    local c01 = rand_2d(x0, y1)
+    local c11 = rand_2d(x1, y1)
+
+    local bottom = lerp(c00, c10, sx)
+    local top = lerp(c01, c11, sx)
+
+    return lerp(bottom, top, sy)
+end
+
+
+function math.noise2d(x, y, octaves)
+    octaves = octaves or 1
+    local value = 0.0
+    local mul = 1.0
+    for i=1,octaves do
+        value = value * (1.0 - mul)
+            + sample_noise2d(x + 37 * i, y + 73 * i) * mul
+        x = x * 2.0
+        y = y * 2.0
+        mul = mul * 0.5
+    end
+    return value
+end

res/modules/internal/extensions/table.lua

@@ -59,11 +59,7 @@ end
 
 function table.extend(t1, t2)
     for i, v in pairs(t2) do
-        if type(i) == "number" then
+        t1[i] = v
-            t1[#t1 + 1] = v
-        else
-            t1[i] = v
-        end
     end
 
     return t1
@@ -201,3 +197,11 @@ function table.tostring(t)
     end
     return s..']'
 end
+
+function table.keys(t)
+    local keys = {}
+    for key, _ in pairs(t) do
+        table.insert(keys, key)
+    end
+    return keys
+end

res/modules/internal/gui_util.lua

@@ -77,15 +77,18 @@ function Element.new(docname, name)
 end
 
 -- the engine automatically creates an instance for every ui document (layout)
-local Document = {}
+local Document = {
-function Document.new(docname)
+    __index=function(self, k)
-    return setmetatable({name=docname}, {
+        if type(k) ~= "string" then
-        __index=function(self, k)
+            error("element id is not a string")
-            local elem = Element.new(self.name, k)
-            rawset(self, k, elem)
-            return elem
         end
-    })
+        local elem = Element.new(self.name, k)
+        rawset(self, k, elem)
+        return elem
+    end
+}
+function Document.new(docname)
+    return setmetatable({name=docname}, Document)
 end
 
 local RadioGroup = {}

res/modules/internal/rules.lua

@@ -1,4 +1,4 @@
-local rules = {nexid = 1, rules = {}}
+local rules = {nextid = 1, rules = {}}
 
 function rules.get_rule(name)
     local rule = rules.rules[name]
@@ -27,13 +27,13 @@ end
 
 function rules.reset(name)
     local rule = rules.get_rule(name)
-    rules.set(rule.default)
+    rules.set(name, rule.default)
 end
 
 function rules.listen(name, handler)
     local rule = rules.get_rule(name)
-    local id = rules.nexid
+    local id = rules.nextid
-    rules.nextid = rules.nexid + 1
+    rules.nextid = rules.nextid + 1
     rule.listeners[utf8.encode(id)] = handler
     return id
 end

res/modules/internal/stream_providers/bytearray.lua

@@ -0,0 +1,131 @@
+local io_stream = require "core:io_stream"
+
+local lib = { }
+
+local buffers = { }
+local positions = { }
+
+local next_descriptor = 0
+
+local function open_descriptor(buffer)
+    next_descriptor = next_descriptor + 1
+
+    buffers[next_descriptor] = buffer
+    positions[next_descriptor] = 1
+
+    return next_descriptor
+end
+
+local function require_descriptor(descriptor)
+    if not buffers[descriptor] then
+        error("unknown descriptor")
+    end
+end
+
+function lib.read(descriptor, length)
+    require_descriptor(descriptor)
+
+    local buf = buffers[descriptor]
+    local buf_length = #buf
+    local pos = positions[descriptor]
+
+    local to_read = math.min(buf_length - pos + 1, length)
+
+    if to_read <= 0 then
+        return Bytearray()
+    end
+
+    local segment = buf:slice(pos, to_read)
+
+    positions[descriptor] = pos + to_read
+
+    return segment
+end
+
+function lib.write(descriptor, data)
+    require_descriptor(descriptor)
+
+    local buf = buffers[descriptor]
+    local pos = positions[descriptor]
+
+    local buf_length = #buf
+    local data_length = #data
+
+    local end_pos = pos + data_length - 1
+
+    -- size ensuring
+    if end_pos > buf_length then
+        for i = buf_length + 1, end_pos do
+            buf[i] = 0
+        end
+    end
+
+    for i = 1, data_length do
+        buf[i + pos - 1] = data[i]
+    end
+
+    positions[descriptor] = pos + data_length
+end
+
+function lib.seek(descriptor, mode, offset)
+    require_descriptor(descriptor)
+
+    local buf = buffers[descriptor]
+    local buf_length = #buf
+
+    local base
+
+    if mode == 'b' then
+        base = 1
+    elseif mode == 'c' then
+        base = positions[descriptor]
+    elseif mode == 'e' then
+        base = buf_length + 1
+    else error('invalid seek mode') end
+
+    local new_pos = base + offset
+
+    if new_pos < 1 then
+        error('failed to seek stream')
+    end
+
+    positions[descriptor] = new_pos
+end
+
+function lib.tell(descriptor)
+    require_descriptor(descriptor)
+
+    return positions[descriptor]
+end
+
+function lib.available(descriptor)
+    require_descriptor(descriptor)
+
+    local buf = buffers[descriptor]
+    local pos = positions[descriptor]
+
+    return math.max(#buf - pos + 1, 0)
+end
+
+function lib.is_alive(descriptor)
+    return buffers[descriptor] ~= nil
+end
+
+function lib.close(descriptor)
+    require_descriptor(descriptor)
+
+    buffers[descriptor] = nil
+    positions[descriptor] = nil
+end
+
+return function(buffer, binary_mode)
+    if binary_mode == nil then
+        binary_mode = true
+    end
+
+    return io_stream.new(
+        open_descriptor(buffer),
+        binary_mode,
+        lib
+    )
+end

res/modules/internal/stream_providers/file.lua

@@ -4,15 +4,28 @@ local lib = {
     read = file.__read_descriptor,
     write = file.__write_descriptor,
     seek = file.__seek_descriptor,
+    tell = file.__tell_descriptor,
     flush = file.__flush_descriptor,
+    available = file.__available_descriptor,
     is_alive = file.__has_descriptor,
     close = file.__close_descriptor
 }
 
+local __open_descriptor = file.__open_descriptor
+file.__open_descriptor = nil
+file.__read_descriptor = nil
+file.__write_descriptor = nil
+file.__seek_descriptor = nil
+file.__tell_descriptor = nil
+file.__flush_descriptor = nil
+file.__available_descriptor = nil
+file.__has_descriptor = nil
+file.__close_descriptor = nil
+
 return function(path, mode)
     return io_stream.new(
-        file.__open_descriptor(path, mode),
+        __open_descriptor(path, mode),
         mode:find('b') ~= nil,
         lib
     )
-end
+end

res/modules/internal/stream_providers/named_pipe_unix.lua

@@ -9,6 +9,7 @@ int close(int fd);
 ssize_t read(int fd, void *buf, size_t count);
 ssize_t write(int fd, const void *buf, size_t count);
 int fcntl(int fd, int cmd, ...);
+int ioctl(int fd, unsigned long request, ...);
 
 const char *strerror(int errnum);
 ]]
@@ -20,6 +21,7 @@ local O_WRONLY   = 0x1
 local O_RDWR     = 0x2
 local O_NONBLOCK = 0x800
 local F_GETFL    = 3
+local FIONREAD   = 0x541B
 
 local function getError()
     local err = FFI.errno()
@@ -58,12 +60,16 @@ function lib.write(fd, bytearray)
     end
 end
 
-function lib.seek(fd, mode, offset)
+function lib.available(fd)
-    error("cannot seek the named pipe")
+    if fd == nil or fd < 0 then return 0 end
-end
 
-function lib.flush(fd)
+    local bytes_ready = FFI.new("int[1]", 0)
-    -- no flush on unix
+
+    if C.ioctl(fd, FIONREAD, bytes_ready) == -1 then
+        return 0
+    end
+
+    return tonumber(bytes_ready[0])
 end
 
 function lib.is_alive(fd)

res/modules/internal/stream_providers/named_pipe_windows.lua

@@ -97,14 +97,26 @@ function lib.write(handle, bytearray)
     end
 end
 
-function lib.seek(handle, mode, offset)
-    error("cannot seek the named pipe")
-end
-
 function lib.flush(handle)
     C.FlushFileBuffers(handle)
 end
 
+function lib.available(handle)
+    if handle == nil or handle == INVALID_HANDLE_VALUE then
+        return 0
+    end
+
+    local bytes_available = FFI.new("DWORD[1]")
+
+    local success = C.PeekNamedPipe(handle, nil, 0, nil, bytes_available, nil)
+
+    if success == 0 then
+        return 0
+    end
+
+    return tonumber(bytes_available[0])
+end
+
 function lib.is_alive(handle)
     if handle == nil or handle == INVALID_HANDLE_VALUE then
         return false

res/modules/internal/stream_providers/socket.lua

@@ -0,0 +1,64 @@
+local io_stream = require "core:io_stream"
+
+local lib = { }
+
+local sockets = { }
+
+local next_descriptor = 0
+
+local function open_descriptor(socket)
+    next_descriptor = next_descriptor + 1
+
+    sockets[next_descriptor] = socket
+
+    return next_descriptor
+end
+
+local function require_descriptor(descriptor)
+    if not sockets[descriptor] then
+        error("unknown descriptor")
+    end
+end
+
+function lib.read(descriptor, length)
+    require_descriptor(descriptor)
+
+    return sockets[descriptor]:recv(length)
+end
+
+function lib.write(descriptor, data)
+    require_descriptor(descriptor)
+
+    sockets[descriptor]:send(data)
+end
+
+function lib.available(descriptor)
+    require_descriptor(descriptor)
+
+    return sockets[descriptor]:available()
+end
+
+function lib.is_alive(descriptor)
+    local socket = sockets[descriptor]
+
+    return socket ~= nil and socket:is_alive()
+end
+
+function lib.close(descriptor)
+    require_descriptor(descriptor)
+
+    sockets[descriptor]:close()
+    sockets[descriptor] = nil
+end
+
+return function(socket, binary_mode)
+    if binary_mode == nil then
+        binary_mode = true
+    end
+
+    return io_stream.new(
+        open_descriptor(socket),
+        binary_mode,
+        lib
+    )
+end

res/modules/internal/test.lua

@@ -0,0 +1,139 @@
+local __app = __vc_app
+
+local function get_node_center(node)
+    local pos = node.wpos
+    local size = node.size
+    return pos[1] + size[1] / 2, pos[2] + size[2] / 2
+end
+
+local function types_check_enum(value, enum)
+    if value == nil then
+        return true, nil
+    end
+    if type(value) ~= "string" then
+        return false, string.format("string expected [%s]", table.concat(table.keys(enum), "|"))
+    end
+    return true, nil
+end
+
+local function types_check_number(value)
+    if value == nil then
+        return true, nil
+    end
+    local value_type = type(value)
+    if value_type ~= "number" then
+        return false, string.format("number expected, got %s", value_type)
+    end
+end
+
+local function check_option(t, key, func, ...)
+    local value = t[key]
+    if value == nil then
+        return nil
+    end
+    local success, message = func(value, ...)
+    if not success then
+        error(string.format("invalid option '%s': %s", key, message))
+    end
+end
+
+local buttons_enum = {
+    left = 0,
+    right = 1,
+    middle = 2,
+}
+local no_options = {}
+
+local _tick = __app.tick
+local _set_button_pressed = test.set_button_pressed
+local _set_key_pressed = test.set_key_pressed
+local _enter_text = test.enter_text
+test.set_button_pressed = nil
+test.set_key_pressed = nil
+test.enter_text = nil
+
+function test.click(node, options)
+    options = options or no_options
+
+    check_option(options, 'button', types_check_enum, buttons_enum)
+    check_option(options, 'timeout', types_check_number)
+
+    local button = buttons_enum[options.button or 'left']
+    local timeout = options.timeout or 1000
+
+    local tm = time.precise_time()
+    while (time.precise_time() - tm) * 1000 < timeout do
+        if node.exists then
+            break
+        end
+        _tick()
+    end
+    if not node.exists then
+        error(string.format("timeout %s ms exceeded: element %s does not exists",
+            math.floor(timeout), string.escape(rawget(node, 'name'))))
+    end
+
+    local center_x, center_y = get_node_center(node)
+    _set_button_pressed(button, center_x, center_y, true)
+    _tick()
+    _set_button_pressed(button, center_x, center_y, false)
+    _tick()
+end
+
+-- TODO: replace with resolving in C++ side
+function test.find_by_attr(node, attr, value)
+    if getmetatable(node) == Document then
+        return test.find_by_attr(node.root, attr, value)
+    end
+    if node[attr] == value then
+        return node
+    end
+    local i = 1
+    while true do
+        local subnode = node[i]
+        if subnode == nil then
+            break
+        end
+        local found = test.find_by_attr(subnode, attr, value)
+        if found then
+            return found
+        end
+        i = i + 1
+    end
+end
+
+function test.find_by_text(node, text)
+    return test.find_by_attr(node, "text", text)
+end
+
+function test.find_by_attr_presence(node, attr)
+    if node[attr] then
+        return node
+    end
+    local i = 1
+    while true do
+        local subnode = node[i]
+        if subnode == nil then
+            break
+        end
+        local found = test.find_by_attr_presence(subnode, attr)
+        if found then
+            return found
+        end
+        i = i + 1
+    end
+end
+
+function test.fill(node, text, options)
+    test.click(node, options)
+    __app.tick()
+    _enter_text(text)
+    test.press("enter")
+end
+
+function test.press(key)
+    _set_key_pressed(key, true)
+    __app.tick()
+    _set_key_pressed(key, false)
+    __app.tick()
+end

res/modules/io_stream.lua

@@ -25,13 +25,13 @@ local ALL_FLUSH_MODES = {
 local CR = string.byte('\r')
 local LF = string.byte('\n')
 
-local function readFully(result, readFunc)
+local function read_fully(result, read_func)
     local isTable = type(result) == "table"
 
     local buf
 
     repeat
-        buf = readFunc(MAX_BUFFER_SIZE)
+        buf = read_func(MAX_BUFFER_SIZE)
 
         if isTable then
             for i = 1, #buf do
@@ -42,41 +42,46 @@ local function readFully(result, readFunc)
 end
 
 --[[
-
 descriptor - descriptor of stream for provided I/O library
 binaryMode - if enabled, most methods will expect bytes instead of strings
 ioLib - I/O library. Should include the following functions:
     read(descriptor: int, length: int) -> Bytearray
         May return bytearray with a smaller size if bytes have not arrived yet or have run out
+        May throw error if descriptor isn't readable
     write(descriptor: int, data: Bytearray)
-    flush(descriptor: int)
+        May throw error if descriptor isn't writeable
+    [optional] seek(descriptor: int, mode: string, offset: int)
+        Mode may be 'b' (relative begin), 'c' (relative current), 'e' (relative end + 1)
+    [optional] tell(descriptor: int) -> int
+    [optional] flush(descriptor: int)
+    [optional] available(descriptor: int) -> int
     is_alive(descriptor: int) -> bool
     close(descriptor: int)
 --]]
 
-function io_stream.new(descriptor, binaryMode, ioLib, mode, flushMode)
+function io_stream.new(descriptor, binary_mode, io_lib, mode, flush_mode)
     mode = mode or DEFAULT_MODE
-    flushMode = flushMode or FLUSH_MODE_ALL
+    flush_mode = flush_mode or FLUSH_MODE_ALL
 
     local self = setmetatable({}, io_stream)
 
     self.descriptor = descriptor
-    self.binaryMode = binaryMode
+    self.binary_mode = binary_mode
-    self.maxBufferSize = MAX_BUFFER_SIZE
+    self.max_buffer_size = MAX_BUFFER_SIZE
-    self.ioLib = ioLib
+    self.io_lib = io_lib
 
     self:set_mode(mode)
-    self:set_flush_mode(flushMode)
+    self:set_flush_mode(flush_mode)
 
     return self
 end
 
 function io_stream:is_binary_mode()
-    return self.binaryMode
+    return self.binary_mode
 end
 
-function io_stream:set_binary_mode(binaryMode)
+function io_stream:set_binary_mode(binary_mode)
-    self.binaryMode = binaryMode ~= nil
+    self.binary_mode = binary_mode ~= nil
 end
 
 function io_stream:get_mode()
@@ -88,124 +93,141 @@ function io_stream:set_mode(mode)
         error("invalid stream mode: "..mode)
     end
 
-    if self.mode == BUFFERED_MODE then
+    if self.write_buffer then
-        self.writeBuffer:clear()
+        self.write_buffer:clear()
-        self.readBuffer:clear()
+        self.write_buffer = nil
     end
 
-    if mode == BUFFERED_MODE and not self.writeBuffer then
+    if self.read_buffer then
-        self.writeBuffer = Bytearray()
+        self.read_buffer:clear()
-        self.readBuffer = Bytearray()
+        self.read_buffer = nil
+    end
+
+    if mode == BUFFERED_MODE then
+        self.write_buffer = Bytearray(self.max_buffer_size)
+        self.read_buffer = Bytearray(self.max_buffer_size)
     end
 
     self.mode = mode
 end
 
 function io_stream:get_flush_mode()
-    return self.flushMode
+    return self.flush_mode
 end
 
-function io_stream:set_flush_mode(flushMode)
+function io_stream:set_flush_mode(flush_mode)
-    if not table.has(ALL_FLUSH_MODES, flushMode) then
+    if not table.has(ALL_FLUSH_MODES, flush_mode) then
-        error("invalid flush mode: "..flushMode)
+        error("invalid flush mode: " .. flush_mode)
     end
 
-    self.flushMode = flushMode
+    self.flush_mode = flush_mode
 end
 
 function io_stream:get_max_buffer_size()
-    return self.maxBufferSize
+    return self.max_buffer_size
 end
 
-function io_stream:set_max_buffer_size(maxBufferSize)
+function io_stream:set_max_buffer_size(max_buffer_size)
-    self.maxBufferSize = maxBufferSize
+    self.max_buffer_size = max_buffer_size
+
+    self.write_buffer = Bytearray(self.max_buffer_size)
+    self.read_buffer = Bytearray(self.max_buffer_size)
 end
 
 function io_stream:available(length)
+    local available = self.io_lib.available and self.io_lib.available(self.descriptor) or 0
+
     if self.mode == BUFFERED_MODE then
-        self:__update_read_buffer()
+        available = available + #self.read_buffer
+    end
 
-        if not length then
+    if not length then
-            return #self.readBuffer
+        return available
-        else
+    else
-            return #self.readBuffer >= length
+        return available >= length
-        end
     end
 end
 
-function io_stream:__update_read_buffer()
+function io_stream:__read(length, from_read_fully)
-    local readed = Bytearray()
-
-    readFully(readed, function(length) return self.ioLib.read(self.descriptor, length) end)
-
-    self.readBuffer:append(readed)
-
-    if #self.readBuffer > self.maxBufferSize then
-        error "buffer overflow"
-    end
-end
-
-function io_stream:__read(length)
     if self.mode == YIELD_MODE then
+        if from_read_fully then
+            return self.io_lib.read(self.descriptor, length)
+        end
+
         local buffer = Bytearray()
 
         while #buffer < length do
-            buffer:append(self.ioLib.read(self.descriptor, length - #buffer))
+            buffer:append(self.io_lib.read(self.descriptor, length - #buffer))
 
             if #buffer < length then coroutine.yield() end
         end
 
         return buffer
     elseif self.mode == BUFFERED_MODE then
-        self:__update_read_buffer()
+        local buf_len = #self.read_buffer
 
-        if #self.readBuffer < length then
+        if buf_len < length then
-            error "buffer underflow"
+            self.read_buffer:append(
+                self.io_lib.read(self.descriptor, self.max_buffer_size - buf_len)
+            )
         end
 
-        local copy
+        buf_len = #self.read_buffer
 
-        if #self.readBuffer == length then
+        length = math.min(buf_len, length)
-            copy = Bytearray()
-            
-            copy:append(self.readBuffer)
 
-            self.readBuffer:clear()
+        local copy = self.read_buffer:slice(1, length)
+
+        if buf_len == length then
+            self.read_buffer:clear()
         else
-            copy = Bytearray()
+            self.read_buffer:remove(1, length)
-
-            for i = 1, length do
-                copy[i] = self.readBuffer[i]
-            end
-
-            self.readBuffer:remove(1, length)
         end
 
         return copy
     elseif self.mode == DEFAULT_MODE then
-        return self.ioLib.read(self.descriptor, length)
+        return self.io_lib.read(self.descriptor, length)
     end
 end
 
 function io_stream:__write(data)
     if self.mode == BUFFERED_MODE then
-        self.writeBuffer:append(data)
+        local data_length = #data
 
-        if #self.writeBuffer > self.maxBufferSize then
+        if #self.write_buffer + data_length > self.max_buffer_size then
-            error "buffer overflow"
+            self:flush()
         end
+
+        if data_length > self.max_buffer_size then
+            local to_write = math.floor(data_length / self.max_buffer_size) * self.max_buffer_size
+            local to_save = data_length - to_write
+
+            self.io_lib.write(self.descriptor, data:slice(1, to_write))
+
+            self:flush()
+
+            self.write_buffer = data:slice(to_write + 1, to_save)
+        else self.write_buffer:append(data) end
     elseif self.mode == DEFAULT_MODE or self.mode == YIELD_MODE then
-        return self.ioLib.write(self.descriptor, data)
+        return self.io_lib.write(self.descriptor, data)
     end
 end
 
-function io_stream:read_fully(useTable)
+function io_stream:read_fully(use_table)
-    if self.binaryMode then
+    if self.binary_mode then
-        local result = useTable and Bytearray() or { }
+        local result = use_table and { } or Bytearray()
 
-        readFully(result, function() return self:__read(self.maxBufferSize) end)
+        local avail = self:available()
+
+        if avail == 0 then
+            avail = self.max_buffer_size
+        end
+
+        read_fully(result, function() return self:__read(avail, true) end)
+
+        return result
     else
-        if useTable then
+        if use_table then
             local lines = { }
 
             local line
@@ -220,7 +242,7 @@ function io_stream:read_fully(useTable)
         else
             local result = Bytearray()
 
-            readFully(result, function() return self:__read(self.maxBufferSize) end)
+            read_fully(result, function() return self:__read(self.max_buffer_size) end)
 
             return utf8.tostring(result)
         end
@@ -262,57 +284,61 @@ function io_stream:write_line(str)
     self:__write(utf8.tobytes(str .. "\n"))
 end
 
-function io_stream:read(arg, useTable)
+function io_stream:read(arg, use_table)
-    local argType = type(arg)
+    local arg_type = type(arg)
 
-    if self.binaryMode then
+    if self.binary_mode then
-        local byteArr
+        local byte_arr
 
-        if argType == "number" then
+        if arg_type == "number" then
             -- using 'arg' as length
 
-            byteArr = self:__read(arg)
+            byte_arr = self:__read(arg)
 
-            if useTable == true then
+            if use_table == true then
                 local t = { }
 
-                for i = 1, #byteArr do
+                for i = 1, #byte_arr do
-                    t[i] = byteArr[i]
+                    t[i] = byte_arr[i]
                 end
 
                 return t
             else
-                return byteArr
+                return byte_arr
             end
-        elseif argType == "string" then
+        elseif arg_type == "string" then
             return byteutil.unpack(
                 arg,
                 self:__read(byteutil.get_size(arg))
             )
-        elseif argType == nil then
+        elseif arg_type == "nil" then
             error(
                 "in binary mode the first argument must be a string data format"..
                 " for the library \"byteutil\" or the number of bytes to read"
             )
         else
-            error("unknown argument type: "..argType)
+            error("unknown argument type: "..arg_type)
         end
     else
         if not arg then
             return self:read_line()
         else
-            local linesCount = arg
+            local lines_count = arg
-            local trimLastEmptyLines = useTable or true
+            local trim_last_empty_lines = use_table
 
-            if linesCount < 0 then error "count of lines to read must be positive" end
+            if use_table == nil then
+                trim_last_empty_lines = true
+            end
+
+            if lines_count < 0 then error "count of lines to read must be positive" end
 
             local result = { }
 
-            for i = 1, linesCount do
+            for i = 1, lines_count do
                 result[i] = self:read_line()
             end
 
-            if trimLastEmptyLines then
+            if trim_last_empty_lines then
                 local i = #result
 
                 while i >= 0 do
@@ -340,41 +366,53 @@ function io_stream:read(arg, useTable)
 end
 
 function io_stream:write(arg, ...)
-    local argType = type(arg)
+    local arg_type = type(arg)
 
-    if self.binaryMode then
+    if self.binary_mode then
-        local byteArr
+        local byte_arr
 
-        if argType ~= "string" then
+        if arg_type ~= "string" then
             -- using arg as bytes table/bytearray
 
-            if argType == "table" then
+            if arg_type == "table" then
-                byteArr = Bytearray(arg)
+                byte_arr = Bytearray(arg)
             else
-                byteArr = arg
+                byte_arr = arg
             end
         else
-            byteArr = byteutil.pack(arg, ...)
+            byte_arr = byteutil.pack(arg, ...)
         end
 
-        self:__write(byteArr)
+        self:__write(byte_arr)
     else
-        if argType == "string" then
+        if arg_type == "string" then
             self:write_line(arg)
-        elseif argType == "table" then
+        elseif arg_type == "table" then
             for i = 1, #arg do
                 self:write_line(arg[i])
             end
-        else error("unknown argument type: "..argType) end
+        else error("unknown argument type: "..arg_type) end
     end
 end
 
 function io_stream:seek(mode, offset)
-    self.ioLib.seek(self.descriptor, mode, offset)
+    if not self.io_lib.seek then
+        error("cannot seek this stream")
+    end
+
+    self.io_lib.seek(self.descriptor, mode, offset)
+end
+
+function io_stream:tell()
+    if not self.io_lib.tell then
+        error("cannot tell this stream")
+    end
+
+    return self.io_lib.tell(self.descriptor)
 end
 
 function io_stream:is_alive()
-    return self.ioLib.is_alive(self.descriptor)
+    return self.io_lib.is_alive(self.descriptor)
 end
 
 function io_stream:is_closed()
@@ -383,20 +421,24 @@ end
 
 function io_stream:close()
     if self.mode == BUFFERED_MODE then
-        self.readBuffer:clear()
+        self.read_buffer:clear()
-        self.writeBuffer:clear()
+        self.write_buffer:clear()
     end
 
-    return self.ioLib.close(self.descriptor)
+    return self.io_lib.close(self.descriptor)
 end
 
 function io_stream:flush()
-    if self.mode == BUFFERED_MODE and #self.writeBuffer > 0 then
+    if self.mode == BUFFERED_MODE and #self.write_buffer > 0 then
-        self.ioLib.write(self.descriptor, self.writeBuffer)
+        self.io_lib.write(self.descriptor, self.write_buffer)
-        self.writeBuffer:clear()
+        self.write_buffer:clear()
     end
 
-    if self.flushMode ~= FLUSH_MODE_ONLY_BUFFER then self.ioLib.flush(self.descriptor) end
+    if self.flush_mode ~= FLUSH_MODE_ONLY_BUFFER then
+        if self.io_lib.flush then
+            self.io_lib.flush(self.descriptor)
+        elseif self:is_closed() then error("stream is closed") end
+    end
 end
 
 return io_stream

res/project.toml

@@ -3,5 +3,6 @@ name = "default"
 base_packs = ["base"]
 permissions = [
     "network",
-    "record-audio"
+    "record-audio",
+    "sub-instances",
 ]

res/scripts/classes.lua

@@ -49,6 +49,7 @@ local Socket = {__index={
         end
         return self:recv(length, usetable)
     end,
+    as_stream=network.__as_stream,
     close=function(self) return network.__close(self.id) end,
     available=function(self) return network.__available(self.id) or 0 end,
     is_alive=function(self) return network.__is_alive(self.id) end,

res/scripts/stdcmd.lua

@@ -140,7 +140,7 @@ console.add_command(
         for y=y1,y2 do
             for z=z1,z2 do
                 for x=x1,x2 do
-                    block.set(x, y, z, id)
+                    block.set(x, y, z, id, 0, true)
                 end
             end
         end

res/scripts/stdlib.lua

@@ -127,6 +127,10 @@ require "core:internal/extensions/inventory"
 asserts = require "core:internal/asserts"
 events = require "core:internal/events"
 
+if test then
+    require "core:internal/test"
+end
+
 function pack.unload(prefix)
     events.remove_by_prefix(prefix)
 end
@@ -136,7 +140,20 @@ local __vc_named_coroutines = {}
 local __vc_next_coroutine = 1
 
 function __vc_start_coroutine(chunk)
-    local co = coroutine.create(chunk)
+    local co = coroutine.create(function()
+        local _, err = xpcall(chunk, function(msg)
+            local traceback = debug.get_traceback(0)
+            local s = string.format("%s:", msg)
+            for i=1,#traceback - 2 do
+                local frame = traceback[i]
+                s = s .. "\n\t"..tb_frame_tostring(frame)
+            end
+            return s
+        end)
+        if err then
+            error(err)
+        end
+    end)
     local id = __vc_next_coroutine
     __vc_next_coroutine = __vc_next_coroutine + 1
     __vc_coroutines[id] = co
@@ -334,6 +351,10 @@ else
     os.pid = ffi.C.getpid()
 end
 
+require("core:io_stream").wrap_bytearray = require "core:internal/stream_providers/bytearray"
+
+network.__as_stream = require "core:internal/stream_providers/socket"
+
 math.randomseed(time.uptime() * 1536227939)
 
 rules = require "core:internal/rules"

res/scripts/stdmin.lua

@@ -10,8 +10,9 @@ vc = {
     is_client = function()
         return not _vc_headless
     end,
+    get_version = __vc_app.get_version,
     get_setting = __vc_app.get_setting,
-    get_setting_str = __vc_app.get_setting_str,
+    str_setting = __vc_app.str_setting,
     get_setting_info = __vc_app.get_setting_info,
 }
 

src/audio/audio.cpp

@@ -173,6 +173,12 @@ void audio::initialize(
         logger.info() << "initializing NoAudio backend";
         backend = NoAudio::create().release();
     }
+    if (settings.inputDevice.get() == "auto") {
+        auto inputDevices = audio::get_input_devices_names();
+        if (!inputDevices.empty()) {
+            settings.inputDevice.set(inputDevices.at(0));
+        }
+    }
     struct {
         std::string name;
         NumberSetting* setting;
@@ -210,7 +216,9 @@ void audio::initialize(
             ::input_device = backend->openInputDevice(
                 settings.inputDevice.get(), 44100, 1, 16
             );
-            ::input_device->startCapture();
+            if (::input_device != nullptr) {
+                ::input_device->startCapture();
+            }
         } else {
             if (::input_device) {
                 ::input_device->stopCapture();

src/coders/vector_fonts.cpp

@@ -30,6 +30,7 @@ namespace {
     public:
         FTFontFile(FT_Face face, util::Buffer<ubyte> buffer)
             : face(std::move(face)), buffer(std::move(buffer)) {
+            monospace = this->face->face_flags & FT_FACE_FLAG_FIXED_WIDTH;
         }
 
         ~FTFontFile() {

src/coders/vector_fonts.hpp

@@ -19,6 +19,12 @@ namespace vector_fonts {
         virtual std::unique_ptr<Texture> renderPage(
             int pageid, std::vector<Glyph>& glyphs, int size
         ) = 0;
+
+        bool isMonospace() const {
+            return monospace;
+        }
+    protected:
+        bool monospace = true;
     };
 
     void initialize();

src/constants.hpp

@@ -16,6 +16,9 @@ inline constexpr bool ENGINE_DEBUG_BUILD = true;
 
 inline const std::string ENGINE_VERSION_STRING = "0.32";
 
+inline constexpr uint MAX_SUBPROCESSES = 1;
+inline constexpr uint MAX_SUBPROCESS_DEPTH = 2;
+
 /// @brief world regions format version
 inline constexpr uint REGION_FORMAT_VERSION = 3;
 

src/content/Content.hpp

@@ -188,6 +188,7 @@ public:
     ContentUnitDefs<GeneratorDef> generators;
     std::unique_ptr<DrawGroups> const drawGroups;
     ResourceIndicesSet resourceIndices {};
+    std::set<std::string> components {};
 
     Content(
         std::unique_ptr<ContentIndices> indices,

src/content/ContentBuilder.cpp

@@ -26,17 +26,21 @@ std::unique_ptr<Content> ContentBuilder::build() {
             def.rt.tags.insert(tags.add(tag));
         }
 
+        auto isSolid = [](const Variant& variant) {
+            return variant.model.type == BlockModelType::BLOCK ||
+                   variant.culling == CullingMode::OPTIONAL;
+        };
+
         if (def.variants) {
             for (auto& variant : def.variants->variants) {
-                variant.rt.solid =
+                variant.rt.solid = isSolid(variant) || def.explictlySolid;
-                    variant.model.type == BlockModelType::BLOCK ||
-                    def.explictlySolid;
             }
             def.defaults = def.variants->variants.at(0);
         } else {
-            def.defaults.rt.solid =
+            def.defaults.rt.solid = isSolid(def.defaults) || def.explictlySolid;
-                def.defaults.model.type == BlockModelType::BLOCK ||
+        }
-                def.explictlySolid;
+        if (def.material.empty()) {
+            defaults.at("block-material").get(def.material);
         }
 
         const float EPSILON = 0.01f;

src/content/ContentLoader.cpp

@@ -506,6 +506,7 @@ void ContentLoader::loadScripts(Content& content) {
     scripting::on_scripts_loading();
     load_scripts(content, content.blocks);
     load_scripts(content, content.items);
+    auto& tmpContent = content;
 
     for (const auto& [packid, runtime] : content.getPacks()) {
         auto env = runtime->getEnvironment();
@@ -516,7 +517,7 @@ void ContentLoader::loadScripts(Content& content) {
 
         // Load entity components
         io::path componentsDir = folder / "scripts/components";
-        foreach_file(componentsDir, [&pack, env](const io::path& file) {
+        foreach_file(componentsDir, [&pack, env, &tmpContent](const io::path& file) {
             auto name = pack.id + ":" + file.stem();
             scripting::load_entity_component(
                 env,
@@ -524,9 +525,21 @@ void ContentLoader::loadScripts(Content& content) {
                 file,
                 pack.id + ":scripts/components/" + file.name()
             );
+            tmpContent.components.insert(name);
         });
     }
 
+    for (const auto& [eid, def] : content.entities.getDefs()) {
+        for (const auto& instance : def->components) {
+            if (content.components.find(instance.component) == content.components.end()) {
+                throw std::runtime_error(
+                    "component " + instance.component +
+                    " is not available (required by entity " + eid + ")"
+                );
+            }
+        }
+    }
+
     scripting::on_content_loaded();
 }
 

src/content/loading/EntityLoader.cpp

@@ -89,6 +89,7 @@ template<> void ContentUnitLoader<EntityDef>::loadUnit(
     root.at("skeleton-name").get(def.skeletonName);
     root.at("material").get(def.material);
     root.at("blocking").get(def.blocking);
+    root.at("selectable").get(def.selectable);
     root.at("solid").get(def.solid);
     root.at("mass").get(def.mass);
     root.at("elasticity").get(def.elasticity);

src/data/dv.hpp

@@ -9,6 +9,10 @@
 #include <stdexcept>
 #include <unordered_map>
 
+#ifdef VC_ENABLE_REFLECTION
+#include "util/EnumMetadata.hpp"
+#endif
+
 namespace util {
     template<class T> class Buffer;
 }
@@ -70,6 +74,14 @@ namespace dv {
             return ptr != nullptr;
         }
 
+        inline value* operator->() noexcept {
+            return ptr;
+        }
+
+        inline const value* operator->() const noexcept {
+            return ptr;
+        }
+
         inline value& operator*() noexcept {
             return *ptr;
         }
@@ -78,6 +90,11 @@ namespace dv {
             return *ptr;
         }
 
+#ifdef VC_ENABLE_REFLECTION
+        template <typename T>
+        bool get(T& dst, const util::EnumMetadata<T>& mt) const;
+#endif
+
         bool get(std::string& dst) const;
         bool get(bool& dst) const;
         bool get(char& dst) const;
@@ -552,6 +569,17 @@ namespace dv {
         }
         return false;
     }
+
+#ifdef VC_ENABLE_REFLECTION
+    template <typename T>
+    inline bool optionalvalue::get(T& dst, const util::EnumMetadata<T>& mt) const {
+        if (ptr) {
+            return mt.getItem(ptr->asString(), dst);
+        }
+        return false;
+    }
+#endif
+
     inline bool optionalvalue::get(std::string& dst) const {
         if (ptr) {
             dst = ptr->asString();

src/devtools/AppScriptsControl.cpp

@@ -0,0 +1,59 @@
+#include "AppScriptsControl.hpp"
+
+#include "debug/Logger.hpp"
+#include "engine/CoreParameters.hpp"
+#include "io/io.hpp"
+#include "Project.hpp"
+#include "logic/scripting/scripting.hpp"
+
+static debug::Logger logger("app-scripts");
+
+AppScriptsControl::AppScriptsControl(const CoreParameters& params) {
+    io::path scriptFile =
+        params.scriptFile.empty()
+            ? "project:start.lua"
+            : std::string("script:") + params.scriptFile.filename().u8string();
+    if (io::exists(scriptFile)) {
+        logger.info() << "starting script: " << params.scriptFile.u8string();
+        scriptCoroutine = scripting::start_app_script(scriptFile);
+    } else {
+        logger.warning() << "script does not exists: " << params.scriptFile.u8string();
+    }
+
+    if (!params.headless) {
+        loadProjectClientScript();
+    }
+}
+
+void AppScriptsControl::loadProjectClientScript() {
+    io::path scriptFile = "project:project_client.lua";
+    if (io::exists(scriptFile)) {
+        logger.info() << "starting project client script: " << scriptFile.string();
+        clientScript = scripting::load_client_project_script(scriptFile);
+    } else {
+        logger.warning() << "project client script does not exists: " << scriptFile.string();
+    }
+}
+
+void AppScriptsControl::onScreenChange(const std::string& name, bool show) {
+    if (clientScript) {
+        clientScript->onScreenChange(name, show);
+    }
+}
+
+void AppScriptsControl::tick() {
+    if (scriptCoroutine && scriptCoroutine->isActive()) {
+        scriptCoroutine->update();
+    }
+}
+
+void AppScriptsControl::terminate(std::string_view reason) {
+    if (scriptCoroutine->isActive()) {
+        scriptCoroutine->terminate();
+        logger.info() << "script has been terminated due to " << reason;
+    }
+}
+
+bool AppScriptsControl::isFinished() const {
+    return scriptCoroutine == nullptr || !scriptCoroutine->isActive();
+}

src/devtools/AppScriptsControl.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include "interfaces/Process.hpp"
+
+#include <memory>
+#include <string>
+
+namespace scripting {
+    class IClientProjectScript;
+}
+
+struct CoreParameters;
+struct Project;
+
+class AppScriptsControl {
+public:
+    AppScriptsControl(const CoreParameters& params);
+
+    void tick();
+    void loadProjectClientScript();
+    void terminate(std::string_view reason);
+
+    void onScreenChange(const std::string& name, bool show);
+
+    bool isFinished() const;
+private:
+    std::unique_ptr<scripting::IClientProjectScript> clientScript;
+    std::unique_ptr<Process> scriptCoroutine;
+};

src/devtools/Project.cpp

@@ -2,6 +2,7 @@
 
 #include "data/dv_util.hpp"
 #include "debug/Logger.hpp"
+#include "engine/CoreParameters.hpp"
 #include "io/io.hpp"
 #include "io/path.hpp"
 #include "logic/scripting/scripting.hpp"
@@ -40,26 +41,6 @@ void Project::deserialize(const dv::value& src) {
     }
 }
 
-void Project::loadProjectClientScript() {
-    io::path scriptFile = "project:project_client.lua";
-    if (io::exists(scriptFile)) {
-        logger.info() << "starting project client script";
-        clientScript = scripting::load_client_project_script(scriptFile);
-    } else {
-        logger.warning() << "project client script does not exists";
-    }
-}
-
-void Project::loadProjectStartScript() {
-    io::path scriptFile = "project:start.lua";
-    if (io::exists(scriptFile)) {
-        logger.info() << "starting project start script";
-        setupCoroutine = scripting::start_app_script(scriptFile);
-    } else {
-        logger.warning() << "project start script does not exists";
-    }
-}
-
 bool Permissions::has(const std::string& name) const {
     return permissions.find(name) != permissions.end();
 }

src/devtools/Project.hpp

@@ -1,22 +1,19 @@
 #pragma once
 
+#include "interfaces/Serializable.hpp"
+#include "io/path.hpp"
+
 #include <set>
 #include <string>
 #include <vector>
 #include <memory>
 
-#include "interfaces/Process.hpp"
-#include "interfaces/Serializable.hpp"
-
-namespace scripting {
-    class IClientProjectScript;
-}
-
 struct Permissions {
     static inline std::string DEBUGGING = "debugging";
     static inline std::string NETWORK = "network";
     static inline std::string RECORD_AUDIO = "record-audio";
     static inline std::string WRITE_TO_USER = "write-to-user";
+    static inline std::string SUB_INSTANCES = "sub-instances";
 
     std::set<std::string> permissions;
 
@@ -26,16 +23,12 @@ struct Permissions {
 struct Project : Serializable {
     std::string name;
     std::string title;
+    io::path path;
     std::vector<std::string> basePacks;
-    std::unique_ptr<scripting::IClientProjectScript> clientScript;
-    std::unique_ptr<Process> setupCoroutine;
     Permissions permissions;
 
     ~Project();
 
     dv::value serialize() const override;
     void deserialize(const dv::value& src) override;
-
-    void loadProjectClientScript();
-    void loadProjectStartScript();
 };

src/engine/CoreParameters.hpp

@@ -12,7 +12,9 @@ struct CoreParameters {
     std::filesystem::path userFolder = ".";
     std::filesystem::path scriptFile;
     std::filesystem::path projectFolder;
+    std::filesystem::path logFile;
     std::string debugServerString;
     int tps = 20;
+    int subProcessDepth = 0;
     std::unordered_map<std::string, std::string> projectArgs;
 };

src/engine/Engine.cpp

@@ -13,6 +13,7 @@
 #include "content/ContentControl.hpp"
 #include "core_defs.hpp"
 #include "debug/Logger.hpp"
+#include "devtools/AppScriptsControl.hpp"
 #include "devtools/DebuggingServer.hpp"
 #include "devtools/Editor.hpp"
 #include "devtools/Project.hpp"
@@ -191,10 +192,8 @@ void Engine::initialize(CoreParameters coreParameters) {
         audio::set_input_device(name == "auto" ? "" : name);
     }));
 
-    project->loadProjectStartScript();
+    appScripts = std::make_unique<AppScriptsControl>(params);
-    if (!params.headless) {
+
-        project->loadProjectClientScript();
-    }
     if (params.stdinCommands) {
         cmd::start_stdin_cmd_reader(*this);
     }
@@ -263,9 +262,7 @@ void Engine::detachDebugger() {
 }
 
 void Engine::applicationTick() {
-    if (project->setupCoroutine && project->setupCoroutine->isActive()) {
+    appScripts->tick();
-        project->setupCoroutine->update();
-    }
 }
 
 void Engine::updateFrontend() {
@@ -353,6 +350,7 @@ void Engine::close() {
     network.reset();
     clearKeepedObjects();
     project.reset();
+    appScripts.reset();
     scripting::close();
     logger.info() << "scripting finished";
     if (!params.headless) {
@@ -382,13 +380,14 @@ void Engine::loadAssets() {
 void Engine::loadProject() {
     io::path projectFile = "project:project.toml";
     project = std::make_unique<Project>();
+    project->path = "project:";
     project->deserialize(io::read_object(projectFile));
     logger.info() << "loaded project " << util::quote(project->name);
 }
 
 void Engine::setScreen(std::shared_ptr<Screen> screen) {
-    if (project->clientScript && this->screen) {
+    if (this->screen) {
-        project->clientScript->onScreenChange(this->screen->getName(), false);
+        appScripts->onScreenChange(this->screen->getName(), false);
     }
     // reset audio channels (stop all sources)
     audio::reset_channel(audio::get_channel_index("regular"));
@@ -397,8 +396,8 @@ void Engine::setScreen(std::shared_ptr<Screen> screen) {
     if (this->screen) {
         this->screen->onOpen();
     }
-    if (project->clientScript && this->screen) {
+    if (this->screen) {
-        project->clientScript->onScreenChange(this->screen->getName(), true);
+        appScripts->onScreenChange(this->screen->getName(), true);
         window->setShouldRefresh();
     }
 }
@@ -414,6 +413,7 @@ void Engine::onWorldClosed() {
 }
 
 void Engine::quit() {
+    logger.info() << "quitSignal set to true";
     quitSignal = true;
     if (!isHeadless()) {
         window->setShouldClose(true);

src/engine/Engine.hpp

@@ -12,6 +12,7 @@
 class Assets;
 class AssetsLoader;
 class AssetsManagement;
+class AppScriptsControl;
 class ContentControl;
 class EngineController;
 class EnginePaths;
@@ -55,6 +56,7 @@ class Engine : public util::ObjectsKeeper {
     std::unique_ptr<Project> project;
     std::unique_ptr<SettingsHandler> settingsHandler;
     std::unique_ptr<AssetsManagement> assets;
+    std::unique_ptr<AppScriptsControl> appScripts;
     std::shared_ptr<Screen> screen;
     std::unique_ptr<ContentControl> content;
     std::unique_ptr<EngineController> controller;
@@ -184,5 +186,9 @@ public:
         return debuggingServer.get();
     }
 
+    AppScriptsControl& getAppScripts() {
+        return *appScripts;
+    }
+
     void detachDebugger();
 };

src/engine/Mainloop.cpp

@@ -1,14 +1,17 @@
 #include "Mainloop.hpp"
 
-#include "Engine.hpp"
 #include "debug/Logger.hpp"
+#include "devtools/AppScriptsControl.hpp"
 #include "devtools/Project.hpp"
-#include "frontend/screens/MenuScreen.hpp"
+#include "Engine.hpp"
 #include "frontend/screens/LevelScreen.hpp"
+#include "frontend/screens/MenuScreen.hpp"
+#include "graphics/ui/elements/Container.hpp"
+#include "graphics/ui/GUI.hpp"
+#include "io/path.hpp"
+#include "logic/scripting/scripting.hpp"
 #include "window/Window.hpp"
 #include "world/Level.hpp"
-#include "graphics/ui/GUI.hpp"
-#include "graphics/ui/elements/Container.hpp"
 
 static debug::Logger logger("mainloop");
 
@@ -19,6 +22,7 @@ void Mainloop::run() {
     auto& time = engine.getTime();
     auto& window = engine.getWindow();
     auto& settings = engine.getSettings();
+    const auto& coreParams = engine.getCoreParameters();
 
     engine.setLevelConsumer([this](auto level, int64_t localPlayer) {
         if (level == nullptr) {
@@ -35,9 +39,11 @@ void Mainloop::run() {
 
     logger.info() << "starting menu screen";
     engine.setScreen(std::make_shared<MenuScreen>(engine));
+
+    auto& appScripts = engine.getAppScripts();
     
     logger.info() << "main loop started";
-    while (!window.isShouldClose()){
+    while (!window.isShouldClose() && !engine.isQuitSignal()) {
         time.update(window.time());
         engine.applicationTick();
         engine.updateFrontend();
@@ -50,6 +56,10 @@ void Mainloop::run() {
             settings.display.adaptiveFpsInMenu.get() &&
             dynamic_cast<const MenuScreen*>(engine.getScreen().get()) != nullptr
         );
+        if (coreParams.testMode && appScripts.isFinished()) {
+            logger.info() << "test finished";
+            engine.quit();
+        }
     }
     logger.info() << "main loop stopped";
 }

src/engine/ServerMainloop.cpp

@@ -1,13 +1,14 @@
 #include "ServerMainloop.hpp"
 
 #include "Engine.hpp"
-#include "logic/scripting/scripting.hpp"
+#include "devtools/AppScriptsControl.hpp"
 #include "logic/LevelController.hpp"
 #include "interfaces/Process.hpp"
 #include "debug/Logger.hpp"
 #include "world/Level.hpp"
 #include "world/World.hpp"
 #include "util/platform.hpp"
+#include "devtools/Project.hpp"
 
 #include <chrono>
 
@@ -32,21 +33,12 @@ void ServerMainloop::run() {
         setLevel(std::move(level));
     });
 
-    auto process = scripting::start_app_script(
-        "script:" + coreParams.scriptFile.filename().u8string()
-    );
-
     double targetDelta = 1.0 / static_cast<double>(coreParams.tps);
     double delta = targetDelta;
     auto begin = system_clock::now();
     auto startupTime = begin;
 
-    while (process->isActive()) {
+    while (!engine.isQuitSignal() && !engine.getAppScripts().isFinished()) {
-        if (engine.isQuitSignal()) {
-            process->terminate();
-            logger.info() << "script has been terminated due to quit signal";
-            break;
-        }
         if (coreParams.testMode) {
             time.step(delta);
         } else {
@@ -55,7 +47,6 @@ void ServerMainloop::run() {
                 duration_cast<microseconds>(now - startupTime).count() / 1e6);
             delta = time.getDelta();
         }
-        process->update();
         if (controller) {
             controller->getLevel()->getWorld()->updateTimers(delta);
             controller->update(glm::min(delta, 0.2), false);

src/frontend/ContentGfxCache.cpp

@@ -30,6 +30,7 @@ void ContentGfxCache::refreshVariant(
     uint8_t variantIndex,
     const Atlas& atlas
 ) {
+    std::unordered_map<std::string, std::string> optionalTextures;
     bool denseRender = settings.denseRender.get();
     for (uint side = 0; side < 6; side++) {
         std::string tex = variant.textureFaces[side];
@@ -43,6 +44,7 @@ void ContentGfxCache::refreshVariant(
             texOpaque = tex;
         } else if (variant.culling == CullingMode::OPTIONAL && !denseRender) {
             tex = texOpaque;
+            optionalTextures[variant.textureFaces[side]] = texOpaque;
         }
         size_t index = getRegionIndex(def.rt.id, variantIndex, side, false);
         sideregions[index] = atlas.get(tex);
@@ -56,7 +58,12 @@ void ContentGfxCache::refreshVariant(
             if (pos == std::string::npos) {
                 continue;
             }
-            if (auto region = atlas.getIf(mesh.texture.substr(pos+1))) {
+            std::string texture = mesh.texture.substr(pos+1);
+            const auto& found = optionalTextures.find(texture);
+            if (found != optionalTextures.end()) {
+                texture = found->second;
+            }
+            if (auto region = atlas.getIf(texture)) {
                 for (auto& vertex : mesh.vertices) {
                     vertex.uv = region->apply(vertex.uv);
                 }

src/frontend/UiDocument.cpp

@@ -7,6 +7,9 @@
 #include "graphics/ui/elements/InventoryView.hpp"
 #include "graphics/ui/gui_xml.hpp"
 #include "logic/scripting/scripting.hpp"
+#include "debug/Logger.hpp"
+
+static debug::Logger logger("ui-document");
 
 UiDocument::UiDocument(
     std::string id, 
@@ -17,6 +20,19 @@ UiDocument::UiDocument(
     rebuildIndices();
 }
 
+UiDocument::~UiDocument() {
+    try {
+        scripting::on_ui_destroy(*this);
+    } catch (const std::exception& err) {
+        logger.error() << "an error occurred on calling on_destroy event for document '"
+          << id << "': " << err.what();
+    } catch (...) {
+        logger.error() << "unknown exception caught on calling on_destroy "
+                          "event for document '"
+                       << id << "'";
+    }
+}
+
 void UiDocument::rebuildIndices() {
     map.clear();
     gui::UINode::getIndices(root, map);

src/frontend/UiDocument.hpp

@@ -17,6 +17,7 @@ struct UiDocScript {
     bool onopen : 1;
     bool onprogress : 1;
     bool onclose : 1;
+    bool ondestroy : 1;
 };
 
 using UINodesMap = std::unordered_map<std::string, std::weak_ptr<gui::UINode>>;
@@ -35,6 +36,8 @@ public:
         scriptenv env
     );
 
+    ~UiDocument();
+
     void rebuildIndices();
     void pushIndices(const std::shared_ptr<gui::UINode>& node);
 

src/frontend/hud.cpp

@@ -563,7 +563,7 @@ void Hud::add(const HudElement& element, const dv::value& argsArray) {
             args.emplace_back(static_cast<integer_t>(blockPos[i]));
         }
         scripting::on_ui_open(
-            element.getDocument(), 
+            *element.getDocument(), 
             std::move(args)
         );
     }
@@ -578,7 +578,7 @@ void Hud::onRemove(const HudElement& element) {
         if (invview) {
             inventory = invview->getInventory().get();
         }
-        scripting::on_ui_close(document, inventory);
+        scripting::on_ui_close(*document, inventory);
         if (invview) {
             invview->unbind();
         }

src/frontend/menu.cpp

@@ -86,7 +86,7 @@ UiDocument* menus::show(
     );
     auto document = documentPtr.get();
     engine.getAssets()->store(std::move(documentPtr), fullname);
-    scripting::on_ui_open(document, std::move(args));
+    scripting::on_ui_open(*document, std::move(args));
     menu->addPage(name, document->getRoot());
     menu->setPage(name);
     return document;
@@ -99,13 +99,13 @@ void menus::show_process_panel(
 
     auto menu = engine.getGUI().getMenu();
     menu->reset();
-    auto doc =
+    auto document =
         menus::show(engine, "process", {util::wstr2str_utf8(langs::get(text))});
-    std::dynamic_pointer_cast<Container>(doc->getRoot())
+    std::dynamic_pointer_cast<Container>(document->getRoot())
         ->listenInterval(0.01f, [=]() {
             task->update();
 
             uint tasksDone = task->getWorkDone();
-            scripting::on_ui_progress(doc, tasksDone, initialWork);
+            scripting::on_ui_progress(*document, tasksDone, initialWork);
         });
 }

src/graphics/core/Cubemap.cpp

@@ -4,7 +4,7 @@
 #include <GL/glew.h>
 
 Cubemap::Cubemap(uint width, uint height, ImageFormat imageFormat) 
-  : Texture(0, width, height) 
+  : Texture(0U, width, height, imageFormat) 
 {
     glGenTextures(1, &id);
     glBindTexture(GL_TEXTURE_CUBE_MAP, id);
@@ -14,7 +14,6 @@ Cubemap::Cubemap(uint width, uint height, ImageFormat imageFormat)
     glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
 
-    uint format = gl::to_glenum(imageFormat);
     for (uint face = 0; face < 6; face++) {
         glTexImage2D(
             GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, 
@@ -37,3 +36,23 @@ void Cubemap::bind() const {
 void Cubemap::unbind() const {
     glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
 }
+
+void Cubemap::reload(const ubyte* data, uint width, uint height) {
+    this->width = width;
+    this->height = height;
+    glBindTexture(GL_TEXTURE_CUBE_MAP, id);
+    for (uint face = 0; face < 6; face++) {
+        glTexImage2D(
+            GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, 
+            0, 
+            format, 
+            width, 
+            height, 
+            0, 
+            format, 
+            GL_UNSIGNED_BYTE, 
+            data
+        );
+    }
+    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+}

src/graphics/core/Cubemap.hpp

@@ -9,4 +9,5 @@ public:
 
     virtual void bind() const override;
     virtual void unbind() const override;
+    virtual void reload(const ubyte* data, uint w, uint h) override;
 };

src/graphics/core/DrawContext.cpp

@@ -74,6 +74,18 @@ DrawContext::~DrawContext() {
     if (lineWidth != parent->lineWidth) {
         glLineWidth(parent->lineWidth);
     }
+
+    for (int i = 0; i < textures.size(); i++) {
+        auto texture = parent->textures[i];
+        if (textures[i] != texture) {
+            glActiveTexture(GL_TEXTURE0 + i);
+            if (texture == nullptr) {
+                glBindTexture(GL_TEXTURE_2D, 0);
+            } else {
+                texture->bind();
+            }
+        }
+    }
 }
 
 const glm::uvec2& DrawContext::getViewport() const {
@@ -154,3 +166,13 @@ void DrawContext::setLineWidth(float width) {
     lineWidth = width;
     glLineWidth(width);
 }
+
+void DrawContext::useTexture(int target, const Bindable* texture) {
+    glActiveTexture(GL_TEXTURE0 + target);
+    if (texture == nullptr) {
+        glBindTexture(GL_TEXTURE_2D, 0);
+    } else {
+        texture->bind();
+    }
+    textures.at(target) = texture;
+}

src/graphics/core/DrawContext.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <array>
 #include <glm/vec2.hpp>
 #include <glm/vec4.hpp>
 
@@ -23,6 +24,7 @@ class DrawContext {
     BlendMode blendMode = BlendMode::normal;
     int scissorsCount = 0;
     float lineWidth = 1.0f;
+    std::array<const Bindable*, advanced_pipeline::TARGETS_COUNT> textures {};
 public:
     DrawContext(
         const DrawContext* parent,
@@ -44,4 +46,5 @@ public:
     void setBlendMode(BlendMode mode);
     void setScissors(const glm::vec4& area);
     void setLineWidth(float width);
+    void useTexture(int target, const Bindable* texture);
 };

src/graphics/core/Font.cpp

@@ -26,6 +26,11 @@ Font::Font(
       pages(std::move(pages)),
       glyphs(std::move(glyphs)),
       fontFile(std::move(fontFile)) {
+    if (this->fontFile.has_value()) {
+        if (auto fontPtr = this->fontFile->lock()) {
+            monospace = fontPtr->isMonospace();
+        }
+    }
 }
 
 Font::~Font() = default;
@@ -34,6 +39,10 @@ int Font::getYOffset() const {
     return yoffset;
 }
 
+bool Font::isMonospace() const {
+    return monospace;
+}
+
 int Font::getLineHeight() const {
     return lineHeight;
 }
@@ -53,7 +62,7 @@ bool Font::isPrintableChar(uint codepoint) const {
 
 int FontMetrics::calcWidth(std::wstring_view text, size_t offset, size_t length) const {
     auto font = this->font.has_value() ? this->font->lock() : nullptr;
-    if (font == nullptr) {
+    if (font == nullptr || font->isMonospace()) {
         return std::min(text.length() - offset, length) * _glyphInterval;
     }
     int totalWidth = 0;
@@ -153,6 +162,8 @@ static inline void draw_text(
     const FontStylesScheme* styles,
     size_t styleMapOffset
 ) {
+    bool is3d = std::is_same<Batch, Batch3D>();
+
     static FontStylesScheme defStyles {{{}}, {0}};
 
     if (styles == nullptr) {
@@ -185,13 +196,26 @@ static inline void draw_text(
             float advance = baseAdvance;
             if (auto glyph = font.getGlyph(c)) {
                 yOffset = glyph->yOffset;
-                advance = glyph->xAdvance;
+                advance = glyph->xAdvance /
+                          static_cast<float>(font.getLineHeight()) * 2.0f *
+                          baseAdvance;
             }
             uint charpage = c >> 8;
             if (charpage == page){
                 batch.texture(font.getPage(charpage));
                 draw_glyph(
-                    batch, pos, glm::vec2(x, y - yOffset / static_cast<float>(font.getLineHeight())), c, right, up, interval, style
+                    batch,
+                    pos,
+                    glm::vec2(
+                        x,
+                        y - yOffset * (is3d ? -1 : 1) /
+                                static_cast<float>(font.getLineHeight())
+                    ),
+                    c,
+                    right,
+                    up,
+                    interval,
+                    style
                 );
             }
             else if (charpage > page && charpage < next){

src/graphics/core/Font.hpp

@@ -39,6 +39,7 @@ public:
     );
     ~Font();
 
+    bool isMonospace() const;
     int getLineHeight() const;
     int getYOffset() const;
     
@@ -94,6 +95,7 @@ private:
     int lineHeight;
     int yoffset;
     int glyphInterval;
+    bool monospace = true;
     std::vector<std::unique_ptr<Texture>> pages;
     std::vector<Glyph> glyphs;
     std::optional<std::weak_ptr<vector_fonts::FontFile>> fontFile;

src/graphics/core/Framebuffer.cpp

@@ -1,14 +1,14 @@
 #include "Framebuffer.hpp"
 
 #include <GL/glew.h>
+
 #include "Texture.hpp"
 #include "debug/Logger.hpp"
 
 static debug::Logger logger("gl-framebuffer");
 
 Framebuffer::Framebuffer(uint fbo, uint depth, std::unique_ptr<Texture> texture)
-  : fbo(fbo), depth(depth), texture(std::move(texture)) 
+    : fbo(fbo), depth(depth), texture(std::move(texture)) {
-{
     if (this->texture) {
         width = this->texture->getWidth();
         height = this->texture->getHeight();
@@ -18,35 +18,55 @@ Framebuffer::Framebuffer(uint fbo, uint depth, std::unique_ptr<Texture> texture)
     }
 }
 
-static std::unique_ptr<Texture> create_texture(int width, int height, int format) {
+static std::unique_ptr<Texture> create_texture(
-    GLuint tex;
+    int width, int height, bool alpha
-    glGenTextures(1, &tex);
+) {
-    glBindTexture(GL_TEXTURE_2D, tex);
+    GLenum glformat = alpha ? GL_RGBA : GL_RGB;
-    glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, nullptr);
+
+    GLuint textureid;
+    glGenTextures(1, &textureid);
+    glBindTexture(GL_TEXTURE_2D, textureid);
+    glTexImage2D(
+        GL_TEXTURE_2D,
+        0,
+        glformat,
+        width,
+        height,
+        0,
+        glformat,
+        GL_UNSIGNED_BYTE,
+        nullptr
+    );
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);
+    glFramebufferTexture2D(
-    return std::make_unique<Texture>(tex, width, height);
+        GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureid, 0
+    );
+    return std::make_unique<Texture>(
+        textureid,
+        width,
+        height,
+        alpha ? ImageFormat::RGBA8888 : ImageFormat::RGB888
+    );
 }
 
-Framebuffer::Framebuffer(uint width, uint height, bool alpha) 
+Framebuffer::Framebuffer(uint width, uint height, bool alpha)
-  : width(width), height(height)
+    : width(width), height(height) {
-{
     glGenFramebuffers(1, &fbo);
     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 
-    format = alpha ? GL_RGBA : GL_RGB;
-
     // Setup color attachment (texture)
-    texture = create_texture(width, height, format);
+    texture = create_texture(width, height, alpha);
 
     // Setup depth attachment
     glGenRenderbuffers(1, &depth);
     glBindRenderbuffer(GL_RENDERBUFFER, depth);
     glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
-    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth);
+    glFramebufferRenderbuffer(
+        GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth
+    );
 
     if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
         logger.error() << "framebuffer is not complete!";
@@ -60,11 +80,15 @@ Framebuffer::~Framebuffer() {
     glDeleteRenderbuffers(1, &depth);
 }
 
-void Framebuffer::bind() {
+void Framebuffer::setTexture(std::unique_ptr<Texture> texture) {
+    this->texture = std::move(texture);
+}
+
+void Framebuffer::bind() const {
     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 }
 
-void Framebuffer::unbind() {
+void Framebuffer::unbind() const {
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
@@ -81,7 +105,7 @@ void Framebuffer::resize(uint width, uint height) {
     glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
     glBindRenderbuffer(GL_RENDERBUFFER, 0);
 
-    texture = create_texture(width, height, format);
+    texture->resize(width, height);
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
@@ -102,5 +126,5 @@ uint Framebuffer::getHeight() const {
 }
 
 uint Framebuffer::getFBO() const {
-    return fbo;   
+    return fbo;
 }

src/graphics/core/Framebuffer.hpp

@@ -12,18 +12,19 @@ class Framebuffer : public Bindable {
     uint depth;
     uint width;
     uint height;
-    uint format;
     std::shared_ptr<Texture> texture;
 public:
     Framebuffer(uint fbo, uint depth, std::unique_ptr<Texture> texture);
     Framebuffer(uint width, uint height, bool alpha=false);
     ~Framebuffer();
 
+    void setTexture(std::unique_ptr<Texture> texture);
+
     /// @brief Use framebuffer
-    void bind() override;
+    void bind() const override;
 
     /// @brief Stop using framebuffer
-    void unbind() override;
+    void unbind() const override;
 
     /// @brief Update framebuffer texture size
     /// @param width new width

src/graphics/core/GBuffer.cpp

@@ -108,7 +108,7 @@ GBuffer::~GBuffer() {
     glDeleteFramebuffers(1, &ssaoFbo);
 }
 
-void GBuffer::bind() {
+void GBuffer::bind() const {
     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
     glClear(GL_COLOR_BUFFER_BIT);
 }
@@ -117,7 +117,7 @@ void GBuffer::bindSSAO() const {
     glBindFramebuffer(GL_FRAMEBUFFER, ssaoFbo);
 }
 
-void GBuffer::unbind() {
+void GBuffer::unbind() const {
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 

src/graphics/core/GBuffer.hpp

@@ -9,9 +9,9 @@ public:
     GBuffer(uint width, uint height);
     ~GBuffer() override;
 
-    void bind() override;
+    void bind() const override;
     void bindSSAO() const;
-    void unbind() override;
+    void unbind() const override;
 
     void bindBuffers() const;
     void bindSSAOBuffer() const;

src/graphics/core/Texture.cpp

@@ -7,8 +7,8 @@
 
 uint Texture::MAX_RESOLUTION = 1024; // Window.initialize overrides it
 
-Texture::Texture(uint id, uint width, uint height) 
+Texture::Texture(uint id, uint width, uint height, ImageFormat imageFormat)
-    : id(id), width(width), height(height) {
+    : id(id), width(width), height(height), format(gl::to_glenum(imageFormat)) {
 }
 
 Texture::Texture(const ubyte* data, uint width, uint height, ImageFormat imageFormat) 
@@ -17,7 +17,7 @@ Texture::Texture(const ubyte* data, uint width, uint height, ImageFormat imageFo
     glBindTexture(GL_TEXTURE_2D, id);
     glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 
-    GLenum format = gl::to_glenum(imageFormat);
+    format = gl::to_glenum(imageFormat);
     glTexImage2D(
         GL_TEXTURE_2D, 0, format, width, height, 0,
         format, GL_UNSIGNED_BYTE, static_cast<const GLvoid*>(data)
@@ -41,23 +41,27 @@ void Texture::unbind() const {
     glBindTexture(GL_TEXTURE_2D, 0);
 }
 
+void Texture::resize(uint width, uint height) {
+    reload(nullptr, width, height);
+}
+
 void Texture::reload(const ImageData& image) {
-    width = image.getWidth();
-    height = image.getHeight();
     reload(image.getData(), width, height);
 }
 
 void Texture::reload(const ubyte* data, uint width, uint height) {
+    this->width = width;
+    this->height = height;
     glBindTexture(GL_TEXTURE_2D, id);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
+    glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0,
-        GL_RGBA, GL_UNSIGNED_BYTE, static_cast<const GLvoid*>(data));
+        format, GL_UNSIGNED_BYTE, static_cast<const GLvoid*>(data));
     glGenerateMipmap(GL_TEXTURE_2D);
     glBindTexture(GL_TEXTURE_2D, 0);
 }
 
 void Texture::reloadPartial(const ImageData& image, uint x, uint y, uint w, uint h) {
     glBindTexture(GL_TEXTURE_2D, id);
-    glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, w, h, GL_RGBA, GL_UNSIGNED_BYTE, image.getData());
+    glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, w, h, format, GL_UNSIGNED_BYTE, image.getData());
     glGenerateMipmap(GL_TEXTURE_2D);
     glBindTexture(GL_TEXTURE_2D, 0);
 }

src/graphics/core/Texture.hpp

@@ -1,29 +1,32 @@
 #pragma once
 
-#include "typedefs.hpp"
-#include "maths/UVRegion.hpp"
-#include "ImageData.hpp"
-
 #include <memory>
 
-class Texture {
+#include "ImageData.hpp"
+#include "commons.hpp"
+#include "maths/UVRegion.hpp"
+#include "typedefs.hpp"
+
+class Texture : public Bindable {
 protected:
     uint id;
     uint width;
     uint height;
+    uint format;
 public:
-    Texture(uint id, uint width, uint height);
+    Texture(uint id, uint width, uint height, ImageFormat imageFormat);
     Texture(const ubyte* data, uint width, uint height, ImageFormat format);
     virtual ~Texture();
 
-    virtual void bind() const;
+    virtual void bind() const override;
-    virtual void unbind() const;
+    virtual void unbind() const override;
-    void reload(const ubyte* data, uint w, uint h);
+    virtual void reload(const ubyte* data, uint w, uint h);
     void reloadPartial(const ImageData& image, uint x, uint y, uint w, uint h);
 
     void setNearestFilter();
 
     void reload(const ImageData& image);
+    virtual void resize(uint w, uint h);
 
     void setMipMapping(bool flag, bool pixelated);
 

src/graphics/core/commons.hpp

@@ -59,6 +59,8 @@ namespace advanced_pipeline {
     inline constexpr int TARGET_SSAO = 5;
     inline constexpr int TARGET_SHADOWS0 = 6;
     inline constexpr int TARGET_SHADOWS1 = 7;
+    
+    inline constexpr int TARGETS_COUNT = 8;
 }
 
 VC_ENUM_METADATA(CursorShape)
@@ -85,6 +87,6 @@ class Bindable {
 public:
     virtual ~Bindable() = default;
 
-    virtual void bind() = 0;
+    virtual void bind() const = 0;
-    virtual void unbind() = 0;
+    virtual void unbind() const = 0;
 };

src/graphics/render/BlocksRenderer.cpp

@@ -538,7 +538,6 @@ void BlocksRenderer::render(
                     break;
                 }
                 case BlockModelType::CUSTOM: {
-                    if (!denseRender)
                     blockCustomModel(
                         {x, y, z},
                         def,

src/graphics/render/HandsRenderer.cpp

@@ -34,4 +34,7 @@ void HandsRenderer::render(const Camera& camera) {
         glm::vec3(),
         glm::vec3(1.0f)
     );
+
+    modelBatch.render();
+    modelBatch.setLightsOffset(glm::vec3());
 }

src/graphics/render/Skybox.cpp

@@ -1,91 +1,64 @@
 #include "Skybox.hpp"
-#include "assets/Assets.hpp"
+
-#include "graphics/core/Shader.hpp"
+#include <GL/glew.h>
-#include "graphics/core/Mesh.hpp"
-#include "graphics/core/Batch3D.hpp"
-#include "graphics/core/Texture.hpp"
-#include "graphics/core/Cubemap.hpp"
-#include "graphics/core/Framebuffer.hpp"
-#include "graphics/core/DrawContext.hpp"
-#include "window/Window.hpp"
-#include "window/Camera.hpp"
-#include "maths/UVRegion.hpp"
 
 #include <cmath>
-#include <iostream>
-#include <GL/glew.h>
 #include <glm/glm.hpp>
-#include <glm/gtc/matrix_transform.hpp>
 #include <glm/gtc/constants.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <limits>
+
+#include "assets/Assets.hpp"
+#include "graphics/core/Batch3D.hpp"
+#include "graphics/core/Cubemap.hpp"
+#include "graphics/core/DrawContext.hpp"
+#include "graphics/core/Framebuffer.hpp"
+#include "graphics/core/Mesh.hpp"
+#include "graphics/core/Shader.hpp"
+#include "graphics/core/Texture.hpp"
+#include "maths/UVRegion.hpp"
+#include "window/Camera.hpp"
+#include "window/Window.hpp"
 
 using namespace advanced_pipeline;
 
 const int STARS_COUNT = 3000;
 const int STARS_SEED = 632;
 
-Skybox::Skybox(uint size, Shader& shader)
+Skybox::Skybox(uint size, const Assets& assets)
-  : size(size),
+    : size(size),
-    shader(shader),
+      assets(assets),
-    batch3d(std::make_unique<Batch3D>(4096))
+      shader(assets.require<Shader>("skybox_gen")),
-{
+      batch3d(std::make_unique<Batch3D>(4096)) {
-    auto cubemap = std::make_unique<Cubemap>(size, size, ImageFormat::RGB888);
 
-    uint fboid;
+    SkyboxVertex vertices[] {
-    glGenFramebuffers(1, &fboid);
-    fbo = std::make_unique<Framebuffer>(fboid, 0, std::move(cubemap));
-
-    SkyboxVertex vertices[]{
         {{-1.0f, -1.0f}},
         {{-1.0f, 1.0f}},
         {{1.0f, 1.0f}},
         {{-1.0f, -1.0f}},
         {{1.0f, 1.0f}},
-        {{1.0f, -1.0f}}
+        {{1.0f, -1.0f}}};
-    };
 
     mesh = std::make_unique<Mesh<SkyboxVertex>>(vertices, 6);
-
+    setMode(mode);
-    sprites.push_back(SkySprite {
-        "misc/moon",
-        glm::pi<float>() * 0.5f,
-        4.0f,
-        false,
-        glm::pi<float>() * 0.25f,
-    });
-    
-    sprites.push_back(SkySprite {
-        "misc/moon_flare",
-        glm::pi<float>() * 0.5f,
-        0.5f,
-        false,
-        glm::pi<float>() * 0.25f,
-    });
-
-    sprites.push_back(SkySprite {
-        "misc/sun",
-        glm::pi<float>() * 1.5f,
-        4.0f,
-        true,
-        glm::pi<float>() * 0.25f,
-    });
 }
 
 Skybox::~Skybox() = default;
 
-void Skybox::drawBackground(
+void Skybox::drawBackground(const Camera& camera, int width, int height) {
-    const Camera& camera, const Assets& assets, int width, int height
-) {
     auto backShader = assets.get<Shader>("background");
     backShader->use();
     backShader->uniformMatrix("u_view", camera.getView(false));
     backShader->uniform1f(
         "u_zoom", camera.zoom * camera.getFov() / glm::half_pi<float>()
     );
-    backShader->uniform1f("u_ar", float(width)/float(height));
+    backShader->uniform1f("u_ar", float(width) / float(height));
     backShader->uniform1i("u_skybox", 1);
-    bind();
+    
+    auto texture = fbo->getTexture();
+    texture->bind();
     mesh->draw();
-    unbind();
+    texture->unbind();
 }
 
 void Skybox::drawStars(float angle, float opacity) {
@@ -93,9 +66,7 @@ void Skybox::drawStars(float angle, float opacity) {
     random.setSeed(STARS_SEED);
 
     glm::mat4 rotation = glm::rotate(
-        glm::mat4(1.0f),
+        glm::mat4(1.0f), -angle + glm::pi<float>() * 0.5f, glm::vec3(0, 0, -1)
-        -angle + glm::pi<float>() * 0.5f,
-        glm::vec3(0, 0, -1)
     );
     rotation = glm::rotate(rotation, sunAltitude, glm::vec3(1, 0, 0));
 
@@ -108,41 +79,21 @@ void Skybox::drawStars(float angle, float opacity) {
         glm::vec3 pos = glm::vec4(rx, ry, rz, 1) * rotation;
 
         float sopacity = random.randFloat();
-        if (pos.y < 0.0f)
+        if (pos.y < 0.0f) continue;
-            continue;
 
         sopacity *= (0.2f + std::sqrt(std::cos(angle)) * 0.5f) - 0.05f;
-        glm::vec4 tint (1,1,1, sopacity * opacity);
+        glm::vec4 tint(1, 1, 1, sopacity * opacity);
         batch3d->point(pos * depth, tint);
     }
     batch3d->flushPoints();
 }
 
-void Skybox::draw(
+void Skybox::drawSkySprites(
-    const DrawContext& pctx,
-    const Camera& camera,
-    const Assets& assets,
     float daytime,
-    float fog)
+    float angle,
-{
+    float opacity,
-    const glm::uvec2& viewport = pctx.getViewport();
+    const std::vector<SkySprite>& sprites
-
+) {
-    glActiveTexture(GL_TEXTURE0);
-
-    drawBackground(camera, assets, viewport.x, viewport.y);
-
-    DrawContext ctx = pctx.sub();
-    ctx.setBlendMode(BlendMode::addition);
-
-    auto shader = assets.get<Shader>("ui3d");
-    shader->use();
-    shader->uniformMatrix("u_projview", camera.getProjView(false));
-    shader->uniformMatrix("u_apply", glm::mat4(1.0f));
-    batch3d->begin();
-
-    float angle = daytime * glm::pi<float>() * 2.0f;
-    float opacity = glm::pow(1.0f - fog, 7.0f);
-
     float depthScale = 2e3;
     for (auto& sprite : sprites) {
         batch3d->texture(assets.get<Texture>(sprite.texture));
@@ -159,39 +110,124 @@ void Skybox::draw(
         glm::vec3 pos = glm::vec4(0, distance, 0, 1) * rotation;
         glm::vec3 up = glm::vec4(depthScale, 0, 0, 1) * rotation;
         glm::vec3 right = glm::vec4(0, 0, depthScale, 1) * rotation;
-        glm::vec4 tint (1,1,1, opacity);
+        glm::vec4 tint(1, 1, 1, opacity);
         if (!sprite.emissive) {
-            tint *= 0.6f + std::cos(angle)*0.4;
+            tint *= 0.6f + std::cos(angle) * 0.4;
         }
-        batch3d->sprite(pos, right,
+        batch3d->sprite(pos, right, up, 1, 1, UVRegion(), tint);
-                        up, 1, 1, UVRegion(), tint);
     }
     batch3d->flush();
-    drawStars(angle, opacity);
 }
 
-void Skybox::refresh(const DrawContext& pctx, float t, float mie, const glm::vec3& tint, const glm::vec3& hightlight, uint quality) {
+void Skybox::draw(
+    const Environment& environment,
+    const DrawContext& pctx,
+    const Camera& camera,
+    float daytime,
+    float fog
+) {
+    const glm::uvec2& viewport = pctx.getViewport();
+    drawBackground(camera, viewport.x, viewport.y);
+
+    float angle = daytime * glm::pi<float>() * 2.0f;
+    float opacity = glm::pow(1.0f - fog, 7.0f);
+
+    DrawContext ctx = pctx.sub();
+    ctx.setBlendMode(BlendMode::addition);
+
+    if (environment.sky.sprites.empty() && !environment.sky.stars) {
+        return;
+    }
+
+    auto shader = assets.get<Shader>("ui3d");
+    shader->use();
+    shader->uniformMatrix("u_projview", camera.getProjView(false));
+    shader->uniformMatrix("u_apply", glm::mat4(1.0f));
+    batch3d->begin();
+
+    if (!environment.sky.sprites.empty()) {
+        drawSkySprites(daytime, angle, opacity, environment.sky.sprites);
+    }
+    if (environment.sky.stars) {
+        drawStars(angle, opacity);
+    }
+}
+
+void Skybox::setMode(SkyMode mode) {
+    if (this->mode == mode && fbo) {
+        return;
+    }
+    this->mode = mode;
+
+    uint size = mode == SkyMode::BOX ? this->size : 1U;
+    prevT = std::numeric_limits<float>().min();
+
+    uint fboid;
+    glGenFramebuffers(1, &fboid);
+    fbo = std::make_unique<Framebuffer>(
+        fboid,
+        false,
+        std::make_unique<Cubemap>(size, size, ImageFormat::RGB888)
+    );
+}
+
+void Skybox::refresh(
+    const Environment& environment,
+    const DrawContext& pctx,
+    float dayTime,
+    float mie,
+    const glm::vec3& tint,
+    const glm::vec3& hightlight,
+    uint quality
+) {
+    setMode(environment.sky.mode);
+
+    if (mode == SkyMode::NONE) {
+        return;
+    } else if (mode == SkyMode::SOLID) {
+        DrawContext ctx = pctx.sub();
+        ctx.setDepthMask(false);
+        ctx.setDepthTest(false);
+        ctx.setFramebuffer(fbo.get());
+        ctx.setViewport({fbo->getWidth(), fbo->getHeight()});
+        ctx.useTexture(advanced_pipeline::TARGET_SKYBOX, fbo->getTexture());
+        ctx.useTexture(advanced_pipeline::TARGET_COLOR, nullptr);
+
+        auto cubemap = dynamic_cast<Cubemap*>(fbo->getTexture());
+        assert(cubemap != nullptr);
+
+        for (int face = 0; face < 6; face++) {
+            glFramebufferTexture2D(
+                GL_FRAMEBUFFER,
+                GL_COLOR_ATTACHMENT0,
+                GL_TEXTURE_CUBE_MAP_POSITIVE_X + face,
+                cubemap->getId(),
+                0
+            );
+            glClearColor(tint.r, tint.g, tint.b, 1);
+            glClear(GL_COLOR_BUFFER_BIT);
+        }
+        return;
+    }
+
     frameid++;
-    float dayTime = t;
     DrawContext ctx = pctx.sub();
     ctx.setDepthMask(false);
     ctx.setDepthTest(false);
     ctx.setFramebuffer(fbo.get());
-    ctx.setViewport({size, size});
+    ctx.setViewport({fbo->getWidth(), fbo->getHeight()});
+    ctx.useTexture(advanced_pipeline::TARGET_SKYBOX, fbo->getTexture());
+    ctx.useTexture(advanced_pipeline::TARGET_COLOR, nullptr);
 
     auto cubemap = dynamic_cast<Cubemap*>(fbo->getTexture());
     assert(cubemap != nullptr);
 
-    ready = true;
+    float t = dayTime * glm::two_pi<float>();
-    glActiveTexture(GL_TEXTURE0 + TARGET_SKYBOX);
-    cubemap->bind();
-    shader.use();
-    t *= glm::two_pi<float>();
-
     lightDir = glm::normalize(glm::vec3(sin(t), -cos(t), 0.0f));
 
-    float sunAngle = glm::radians((t / glm::two_pi<float>() - 0.25f) * 360.0f);
+    float sunAngle = glm::radians((dayTime - 0.25f) * 360.0f);
-    float x = -glm::cos(sunAngle + glm::pi<float>() * 0.5f) * glm::radians(sunAltitude);
+    float x = -glm::cos(sunAngle + glm::pi<float>() * 0.5f) *
+              glm::radians(sunAltitude);
     float y = sunAngle - glm::pi<float>() * 0.5f;
     float z = glm::radians(0.0f);
     rotation = glm::rotate(glm::mat4(1.0f), y, glm::vec3(0, 1, 0));
@@ -199,6 +235,7 @@ void Skybox::refresh(const DrawContext& pctx, float t, float mie, const glm::vec
     rotation = glm::rotate(rotation, z, glm::vec3(0, 0, 1));
     lightDir = glm::vec3(rotation * glm::vec4(0, 0, -1, 1));
 
+    shader.use();
     shader.uniform1i("u_quality", quality);
     shader.uniform1f("u_mie", mie);
     shader.uniform3f("u_tint", tint);
@@ -207,23 +244,22 @@ void Skybox::refresh(const DrawContext& pctx, float t, float mie, const glm::vec
     shader.uniform3f("u_lightDir", lightDir);
     shader.uniform1f("u_dayTime", dayTime);
 
-    if (glm::abs(mie-prevMie) + glm::abs(t-prevT) + glm::abs(prevHighlight.r - hightlight.r) >= 0.01) {
+    if (glm::abs(mie - prevMie) + glm::abs(t - prevT) +
+            glm::abs(prevHighlight.r - hightlight.r) >=
+        0.01) {
         for (uint face = 0; face < 6; face++) {
-            refreshFace(face, cubemap);
+            refreshFace(face, *cubemap);
         }
     } else {
         uint face = frameid % 6;
-        refreshFace(face, cubemap);
+        refreshFace(face, *cubemap);
     }
     prevMie = mie;
     prevT = t;
     prevHighlight = hightlight;
-
-    cubemap->unbind();
-    glActiveTexture(GL_TEXTURE0);
 }
 
-void Skybox::refreshFace(uint face, Cubemap* cubemap) {
+void Skybox::refreshFace(uint face, Cubemap& cubemap) {
     const glm::vec3 xaxs[] = {
         {0.0f, 0.0f, -1.0f},
         {0.0f, 0.0f, 1.0f},
@@ -256,7 +292,7 @@ void Skybox::refreshFace(uint face, Cubemap* cubemap) {
         GL_FRAMEBUFFER,
         GL_COLOR_ATTACHMENT0,
         GL_TEXTURE_CUBE_MAP_POSITIVE_X + face,
-        cubemap->getId(),
+        cubemap.getId(),
         0
     );
     shader.uniform3f("u_xaxis", xaxs[face]);
@@ -265,14 +301,6 @@ void Skybox::refreshFace(uint face, Cubemap* cubemap) {
     mesh->draw();
 }
 
-void Skybox::bind() const {
+const Cubemap* Skybox::getCubemap() const {
-    glActiveTexture(GL_TEXTURE0 + TARGET_SKYBOX);
+    return dynamic_cast<const Cubemap*>(fbo->getTexture());
-    fbo->getTexture()->bind();
-    glActiveTexture(GL_TEXTURE0);
-}
-
-void Skybox::unbind() const {
-    glActiveTexture(GL_TEXTURE0 + TARGET_SKYBOX);
-    fbo->getTexture()->unbind();
-    glActiveTexture(GL_TEXTURE0);
 }

src/graphics/render/Skybox.hpp

@@ -1,14 +1,17 @@
 #pragma once
 
+#include <glm/glm.hpp>
 #include <memory>
 #include <string>
 #include <vector>
-#include <glm/glm.hpp>
-#include "typedefs.hpp"
-#include "maths/fastmaths.hpp"
-#include "graphics/core/MeshData.hpp"
 
-template<typename VertexStructure> class Mesh;
+#include "graphics/core/MeshData.hpp"
+#include "maths/fastmaths.hpp"
+#include "typedefs.hpp"
+#include "world/Environment.hpp"
+
+template <typename VertexStructure>
+class Mesh;
 class Shader;
 class Assets;
 class Camera;
@@ -21,29 +24,20 @@ struct SkyboxVertex {
     glm::vec2 position;
 
     static constexpr VertexAttribute ATTRIBUTES[] {
-        {VertexAttribute::Type::FLOAT, false, 2}, 
+        {VertexAttribute::Type::FLOAT, false, 2}, {{}, 0}};
-        {{}, 0}};
-};
-
-struct SkySprite {
-    std::string texture;
-    float phase;
-    float distance;
-    bool emissive;
-    float altitude;
 };
 
 class Skybox {
-    std::unique_ptr<Framebuffer> fbo;
+    SkyMode mode = SkyMode::SOLID;
     uint size;
+    std::unique_ptr<Framebuffer> fbo;
+    const Assets& assets;
     Shader& shader;
-    bool ready = false;
     FastRandom random;
     glm::vec3 lightDir;
 
     std::unique_ptr<Mesh<SkyboxVertex>> mesh;
     std::unique_ptr<Batch3D> batch3d;
-    std::vector<SkySprite> sprites;
     int frameid = 0;
 
     float prevMie = -1.0f;
@@ -53,30 +47,41 @@ class Skybox {
     glm::mat4 rotation;
 
     void drawStars(float angle, float opacity);
-    void drawBackground(
+    void drawBackground(const Camera& camera, int width, int height);
-        const Camera& camera, const Assets& assets, int width, int height
+    void drawSkySprites(
+        float daytime,
+        float angle,
+        float opacity,
+        const std::vector<SkySprite>& sprites
     );
-    void refreshFace(uint face, Cubemap* cubemap);
+    void refreshFace(uint face, Cubemap& cubemap);
 public:
-    Skybox(uint size, Shader& shader);
+    Skybox(uint size, const Assets& assets);
     ~Skybox();
 
+    void setMode(SkyMode mode);
+
     void draw(
-        const DrawContext& pctx, 
+        const Environment& environment,
-        const Camera& camera, 
+        const DrawContext& pctx,
-        const Assets& assets, 
+        const Camera& camera,
         float daytime,
         float fog
     );
 
-    void refresh(const DrawContext& pctx, float t, float mie, const glm::vec3& tint, const glm::vec3& hightlight, uint quality);
+    void refresh(
-    void bind() const;
+        const Environment& environment,
-    void unbind() const;
+        const DrawContext& pctx,
-    bool isReady() const {
+        float t,
-        return ready;
+        float mie,
-    }
+        const glm::vec3& tint,
+        const glm::vec3& hightlight,
+        uint quality
+    );
 
-    const glm::vec3 getLightDir() const {
+    const Cubemap* getCubemap() const;
+
+    const glm::vec3& getLightDir() const {
         return lightDir;
     }
 };

src/graphics/render/TextsRenderer.cpp

@@ -58,7 +58,10 @@ void TextsRenderer::renderNote(
         }
         opacity = preset.xrayOpacity;
     }
-    auto& font = assets.require<Font>(FONT_DEFAULT);
+
+    auto specifiedFont = assets.get<Font>(preset.font);
+    auto& font =
+        specifiedFont ? *specifiedFont : assets.require<Font>(FONT_DEFAULT);
 
     glm::vec3 xvec = note.getAxisX();
     glm::vec3 yvec = note.getAxisY();
@@ -76,7 +79,10 @@ void TextsRenderer::renderNote(
             yvec = camera.up;
         }
         float scale =
-            (1.0f - preset.perspective) * glm::pow(glm::distance(camera.position, pos), 1.0f-preset.perspective);
+            (1.0f - preset.perspective) *
+            glm::pow(
+                glm::distance(camera.position, pos), 1.0f - preset.perspective
+            );
         xvec *= 1.0f + scale;
         yvec *= 1.0f + scale;
     }
@@ -118,6 +124,7 @@ void TextsRenderer::renderNote(
     }
     auto color = preset.color;
     batch.setColor(glm::vec4(color.r, color.g, color.b, color.a * opacity));
+
     font.draw(
         batch,
         text,

src/graphics/render/WorldRenderer.cpp

@@ -1,12 +1,39 @@
 #include "WorldRenderer.hpp"
 
+#include "BlockWrapsRenderer.hpp"
+#include "ChunksRenderer.hpp"
+#include "CloudsRenderer.hpp"
+#include "DebugLinesRenderer.hpp"
+#include "Emitter.hpp"
+#include "HandsRenderer.hpp"
+#include "ModelBatch.hpp"
+#include "NamedSkeletons.hpp"
+#include "ParticlesRenderer.hpp"
+#include "PrecipitationRenderer.hpp"
+#include "Skybox.hpp"
+#include "TextNote.hpp"
+#include "TextsRenderer.hpp"
 #include "assets/Assets.hpp"
 #include "assets/assets_util.hpp"
+#include "coders/GLSLExtension.hpp"
 #include "content/Content.hpp"
 #include "engine/Engine.hpp"
-#include "coders/GLSLExtension.hpp"
-#include "frontend/LevelFrontend.hpp"
 #include "frontend/ContentGfxCache.hpp"
+#include "frontend/LevelFrontend.hpp"
+#include "graphics/commons/Model.hpp"
+#include "graphics/core/Atlas.hpp"
+#include "graphics/core/Batch3D.hpp"
+#include "graphics/core/DrawContext.hpp"
+#include "graphics/core/Font.hpp"
+#include "graphics/core/Framebuffer.hpp"
+#include "graphics/core/GBuffer.hpp"
+#include "graphics/core/LineBatch.hpp"
+#include "graphics/core/Mesh.hpp"
+#include "graphics/core/PostProcessing.hpp"
+#include "graphics/core/Shader.hpp"
+#include "graphics/core/Shadows.hpp"
+#include "graphics/core/Cubemap.hpp"
+#include "graphics/core/Texture.hpp"
 #include "items/Inventory.hpp"
 #include "items/ItemDef.hpp"
 #include "items/ItemStack.hpp"
@@ -25,32 +52,6 @@
 #include "world/Level.hpp"
 #include "world/LevelEvents.hpp"
 #include "world/World.hpp"
-#include "graphics/commons/Model.hpp"
-#include "graphics/core/Atlas.hpp"
-#include "graphics/core/Batch3D.hpp"
-#include "graphics/core/DrawContext.hpp"
-#include "graphics/core/LineBatch.hpp"
-#include "graphics/core/Mesh.hpp"
-#include "graphics/core/PostProcessing.hpp"
-#include "graphics/core/Framebuffer.hpp"
-#include "graphics/core/Shader.hpp"
-#include "graphics/core/Texture.hpp"
-#include "graphics/core/Font.hpp"
-#include "graphics/core/Shadows.hpp"
-#include "graphics/core/GBuffer.hpp"
-#include "BlockWrapsRenderer.hpp"
-#include "ParticlesRenderer.hpp"
-#include "PrecipitationRenderer.hpp"
-#include "HandsRenderer.hpp"
-#include "NamedSkeletons.hpp"
-#include "TextsRenderer.hpp"
-#include "ChunksRenderer.hpp"
-#include "DebugLinesRenderer.hpp"
-#include "ModelBatch.hpp"
-#include "Skybox.hpp"
-#include "Emitter.hpp"
-#include "TextNote.hpp"
-#include "CloudsRenderer.hpp"
 
 #include <assert.h>
 #include <algorithm>
@@ -58,8 +59,6 @@
 #include <glm/gtc/matrix_transform.hpp>
 #include <memory>
 
-using namespace advanced_pipeline;
-
 inline constexpr size_t BATCH3D_CAPACITY = 4096;
 inline constexpr size_t MODEL_BATCH_CAPACITY = 20'000;
 
@@ -105,8 +104,7 @@ WorldRenderer::WorldRenderer(
         [this](LevelEventType, Chunk* chunk) { chunksRenderer->unload(chunk); }
     );
     skybox = std::make_unique<Skybox>(
-        settings.graphics.skyboxResolution.get(),
+        settings.graphics.skyboxResolution.get(), assets
-        assets.require<Shader>("skybox_gen")
     );
 
     const auto& content = level.content;
@@ -160,7 +158,7 @@ void WorldRenderer::setupWorldShader(
     shader.uniform1i("u_debugNormals", false);
     shader.uniform1f("u_dayTime", level.getWorld()->getInfo().daytime);
     shader.uniform2f("u_lightDir", skybox->getLightDir());
-    shader.uniform1i("u_skybox", TARGET_SKYBOX);
+    shader.uniform1i("u_skybox", advanced_pipeline::TARGET_SKYBOX);
 
     auto indices = level.content.getIndices();
     // Light emission when an emissive item is chosen
@@ -179,6 +177,11 @@ void WorldRenderer::setupWorldShader(
     }
 }
 
+float WorldRenderer::calcFogFactor() const {
+    const auto& settings = engine.getSettings();
+    return 15.0f / static_cast<float>(settings.chunks.loadDistance.get() - 2);
+}
+
 void WorldRenderer::renderOpaque(
     const DrawContext& ctx,
     const Camera& camera,
@@ -187,14 +190,12 @@ void WorldRenderer::renderOpaque(
 ) {
     texts->render(ctx, camera, settings, hudVisible, false);
 
-    bool culling = engine.getSettings().graphics.frustumCulling.get();
+    float fogFactor = calcFogFactor();
-    float fogFactor =
-        15.0f / static_cast<float>(settings.chunks.loadDistance.get() - 2);
 
     auto& entityShader = assets.require<Shader>("entity");
     setupWorldShader(entityShader, camera, settings, fogFactor);
-    skybox->bind();
 
+    bool culling = engine.getSettings().graphics.frustumCulling.get();
     if (culling) {
         frustumCulling->update(camera.getProjView());
     }
@@ -213,25 +214,26 @@ void WorldRenderer::renderOpaque(
 
     auto& shader = assets.require<Shader>("main");
     auto& cloudsShader = assets.require<Shader>("clouds");
-    auto& linesShader = assets.require<Shader>("lines");
 
     setupWorldShader(shader, camera, settings, fogFactor);
 
     chunksRenderer->drawChunks(camera, shader);
     blockWraps->draw(ctx);
 
-    int cloudsQuality = settings.graphics.cloudsQuality.get();
+    if (level.environment.sky.clouds) {
-    if (cloudsQuality > 0) {
+        int cloudsQuality = settings.graphics.cloudsQuality.get();
-        setupWorldShader(cloudsShader, camera, settings, fogFactor);
+        if (cloudsQuality > 0) {
-        cloudsRenderer->draw(
+            setupWorldShader(cloudsShader, camera, settings, fogFactor);
-            cloudsShader, weather, timer, fogFactor, camera, cloudsQuality
+            cloudsRenderer->draw(
-        );
+                cloudsShader, weather, timer, fogFactor, camera, cloudsQuality
+            );
+        }
     }
 
     if (hudVisible) {
+        auto& linesShader = assets.require<Shader>("lines");
         renderLines(camera, linesShader, ctx);
     }
-    skybox->unbind();
 }
 
 void WorldRenderer::renderBlockSelection() {
@@ -287,21 +289,19 @@ void WorldRenderer::refreshSettings(Shader** shaders) {
 
     int shadowsQuality = graphics.shadowsQuality.get() * gbufferPipeline;
     shadowMapping->setQuality(shadowsQuality);
-    
+
     CompileTimeShaderSettings currentSettings {
         gbufferPipeline,
         shadowsQuality != 0,
-        graphics.ssao.get() && gbufferPipeline
+        graphics.ssao.get() && gbufferPipeline};
-    };
+    if (prevCTShaderSettings.advancedRender != currentSettings.advancedRender ||
-    if (
-        prevCTShaderSettings.advancedRender != currentSettings.advancedRender ||
         prevCTShaderSettings.shadows != currentSettings.shadows ||
-        prevCTShaderSettings.ssao != currentSettings.ssao
+        prevCTShaderSettings.ssao != currentSettings.ssao) {
-    ) {
         std::vector<std::string> defines;
         if (currentSettings.shadows) defines.emplace_back("ENABLE_SHADOWS");
         if (currentSettings.ssao) defines.emplace_back("ENABLE_SSAO");
-        if (currentSettings.advancedRender) defines.emplace_back("ADVANCED_RENDER");
+        if (currentSettings.advancedRender)
+            defines.emplace_back("ADVANCED_RENDER");
 
         for (size_t i = 0; shaders[i]; i++) {
             shaders[i]->recompile(defines);
@@ -333,7 +333,8 @@ void WorldRenderer::renderFrame(
     auto& entityShader = assets.require<Shader>("entity");
     auto& cloudsShader = assets.require<Shader>("clouds");
     auto& translucentShader = assets.require<Shader>("translucent");
-    auto& deferredShader = assets.require<PostEffect>("deferred_lighting").getShader();
+    auto& deferredShader =
+        assets.require<PostEffect>("deferred_lighting").getShader();
 
     const auto& settings = engine.getSettings();
 
@@ -343,19 +344,19 @@ void WorldRenderer::renderFrame(
         &cloudsShader,
         &translucentShader,
         &deferredShader,
-        nullptr
+        nullptr};
-    };
 
     refreshSettings(affectedShaders);
 
     const auto& worldInfo = world->getInfo();
-    
+
     float clouds = weather.clouds();
     clouds = glm::max(worldInfo.fog, clouds);
     float mie = 1.0f + glm::max(worldInfo.fog, clouds * 0.5f) * 2.0f;
 
     float random = rand() / static_cast<float>(RAND_MAX);
     skybox->refresh(
+        level.environment,
         pctx,
         worldInfo.daytime,
         mie,
@@ -374,20 +375,19 @@ void WorldRenderer::renderFrame(
     {
         DrawContext wctx = pctx.sub();
         postProcessing.use(wctx, gbufferPipeline);
-
         display::clearDepth();
 
         /* Main opaque pass (GBuffer pass) */ {
             DrawContext ctx = wctx.sub();
             ctx.setDepthTest(true);
             ctx.setCullFace(true);
+            ctx.useTexture(advanced_pipeline::TARGET_SKYBOX, skybox->getCubemap());
+            ctx.useTexture(advanced_pipeline::TARGET_COLOR, nullptr);
             renderOpaque(ctx, camera, settings, hudVisible);
         }
         texts->render(pctx, camera, settings, hudVisible, true);
     }
-    skybox->bind();
+    float fogFactor = calcFogFactor();
-    float fogFactor =
-        15.0f / static_cast<float>(settings.chunks.loadDistance.get() - 2);
     if (gbufferPipeline) {
         deferredShader.use();
         setupWorldShader(deferredShader, camera, settings, fogFactor);
@@ -396,6 +396,7 @@ void WorldRenderer::renderFrame(
     {
         DrawContext ctx = pctx.sub();
         ctx.setDepthTest(true);
+        ctx.useTexture(advanced_pipeline::TARGET_COLOR, nullptr);
 
         if (gbufferPipeline) {
             postProcessing.bindDepthBuffer();
@@ -404,7 +405,9 @@ void WorldRenderer::renderFrame(
         }
 
         // Background sky plane
-        skybox->draw(ctx, camera, assets, worldInfo.daytime, clouds);
+        skybox->draw(
+            level.environment, ctx, camera, worldInfo.daytime, clouds
+        );
 
         auto& linesShader = assets.require<Shader>("lines");
         linesShader.use();
@@ -416,10 +419,12 @@ void WorldRenderer::renderFrame(
         linesShader.uniformMatrix("u_projview", projView);
         lineBatch->flush();
 
-        skybox->bind();
+        DrawContext wctx = ctx.sub();
+        wctx.useTexture(advanced_pipeline::TARGET_SKYBOX, skybox->getCubemap());
+        wctx.useTexture(advanced_pipeline::TARGET_COLOR, nullptr);
         // Translucent blocks
         {
-            auto sctx = ctx.sub();
+            auto sctx = wctx.sub();
             sctx.setCullFace(true);
             translucentShader.use();
             setupWorldShader(translucentShader, camera, settings, fogFactor);
@@ -430,44 +435,41 @@ void WorldRenderer::renderFrame(
         entityShader.use();
         setupWorldShader(entityShader, camera, settings, fogFactor);
 
-        std::array<const WeatherPreset*, 2> weatherInstances {&weather.a, &weather.b};
+        std::array<const WeatherPreset*, 2> weatherInstances {
+            &weather.a, &weather.b};
         for (const auto& weather : weatherInstances) {
             float maxIntensity = weather->fall.maxIntensity;
             float zero = weather->fall.minOpacity;
             float one = weather->fall.maxOpacity;
             float t = (weather->intensity * (one - zero)) * maxIntensity + zero;
             entityShader.uniform1i("u_alphaClip", weather->fall.opaque);
-            entityShader.uniform1f("u_opacity", weather->fall.opaque ? t * t : t);
+            entityShader.uniform1f(
+                "u_opacity", weather->fall.opaque ? t * t : t
+            );
             if (weather->intensity > 1.e-3f && !weather->fall.texture.empty()) {
                 precipitation->render(camera, *weather);
             }
         }
-        skybox->unbind();
-
         glBindFramebuffer(GL_FRAMEBUFFER, 0);
     }
     postProcessing.render(pctx, assets, timer, camera);
-    
+
     if (player.currentCamera == player.fpCamera) {
         DrawContext ctx = pctx.sub();
         ctx.setDepthTest(true);
         ctx.setCullFace(true);
+        ctx.useTexture(advanced_pipeline::TARGET_SKYBOX, skybox->getCubemap());
+        ctx.useTexture(advanced_pipeline::TARGET_COLOR, nullptr);
+        display::clearDepth();
 
         // prepare modified HUD camera
         Camera hudcam = camera;
         hudcam.far = 10.0f;
         hudcam.setFov(0.9f);
         hudcam.position = {};
-        
-        hands->render(camera);
 
-        display::clearDepth();
         setupWorldShader(entityShader, hudcam, engine.getSettings(), 0.0f);
-
+        hands->render(camera);
-        skybox->bind();
-        modelBatch->render();
-        modelBatch->setLightsOffset(glm::vec3());
-        skybox->unbind();
     }
     renderBlockOverlay(pctx);
 
@@ -487,13 +489,12 @@ void WorldRenderer::renderBlockOverlay(const DrawContext& wctx) {
     if (def.overlayTexture.empty()) {
         return;
     }
-    auto textureRegion = util::get_texture_region(
+    auto textureRegion =
-        assets, def.overlayTexture, "blocks:notfound"
+        util::get_texture_region(assets, def.overlayTexture, "blocks:notfound");
-    );
     DrawContext ctx = wctx.sub();
     ctx.setDepthTest(false);
     ctx.setCullFace(false);
-    
+
     auto& shader = assets.require<Shader>("ui3d");
     shader.use();
     batch3d->begin();

src/graphics/render/WorldRenderer.hpp

@@ -99,6 +99,8 @@ class WorldRenderer {
     );
 
     void refreshSettings(Shader** shaders);
+
+    float calcFogFactor() const;
 public:
     std::unique_ptr<ParticlesRenderer> particles;
     std::unique_ptr<TextsRenderer> texts;

src/graphics/ui/elements/InlineFrame.cpp

@@ -13,7 +13,7 @@ InlineFrame::~InlineFrame() = default;
 void InlineFrame::setSrc(const std::string& src) {
     this->src = src;
     if (document) {
-        scripting::on_ui_close(document.get(), nullptr);
+        scripting::on_ui_close(*document, nullptr);
         document = nullptr;
         root = nullptr;
     }
@@ -31,7 +31,7 @@ void InlineFrame::setDocument(const std::shared_ptr<UiDocument>& document) {
     root->setSize(size);
 
     gui.postRunnable([this]() {
-        scripting::on_ui_open(this->document.get(), {});
+        scripting::on_ui_open(*this->document, {});
     });
 }
 

src/io/memory_istream.hpp

@@ -15,8 +15,33 @@ public:
     memory_streambuf(const memory_streambuf&) = delete;
     memory_streambuf& operator=(const memory_streambuf&) = delete;
 
+    pos_type seekoff(off_type off, std::ios_base::seekdir way,
+                     std::ios_base::openmode mode = std::ios_base::in) override {
+        if (!(mode & std::ios_base::in)) return pos_type(off_type(-1));
+        char* base = eback();
+        char* end = egptr();
+        if (!base || !end) return pos_type(off_type(-1));
+
+        std::ptrdiff_t current = gptr() - base;
+        std::ptrdiff_t newpos;
+        if (way == std::ios_base::beg) newpos = off;
+        else if (way == std::ios_base::cur) newpos = current + off;
+        else if (way == std::ios_base::end) newpos = (end - base) + off;
+        else return pos_type(off_type(-1));
+
+        if (newpos < 0 || base + newpos > end) return pos_type(off_type(-1));
+        setg(base, base + newpos, end);
+        return pos_type(off_type(newpos));
+    }
+
+    pos_type seekpos(pos_type sp, std::ios_base::openmode mode = std::ios_base::in) override {
+        return seekoff(off_type(sp), std::ios_base::beg, mode);
+    }
 protected:
     int_type underflow() override {
+        if (gptr() < egptr()) {
+            return traits_type::to_int_type(*gptr());
+        }
         return traits_type::eof();
     }
 
@@ -36,7 +61,7 @@ private:
 class memory_view_streambuf : public std::streambuf {
 public:
     explicit memory_view_streambuf(const util::Buffer<char>& buffer)
-        : buffer(std::move(buffer)) {
+        : buffer(buffer) {
         char* base = const_cast<char*>(this->buffer.data());
         char* end = base + this->buffer.size();
         setg(base, base, end);
@@ -45,8 +70,33 @@ public:
     memory_view_streambuf(const memory_view_streambuf&) = delete;
     memory_view_streambuf& operator=(const memory_view_streambuf&) = delete;
 
+    pos_type seekoff(off_type off, std::ios_base::seekdir way,
+                     std::ios_base::openmode mode = std::ios_base::in) override {
+        if (!(mode & std::ios_base::in)) return pos_type(off_type(-1));
+        char* base = eback();
+        char* end = egptr();
+        if (!base || !end) return pos_type(off_type(-1));
+
+        std::ptrdiff_t current = gptr() - base;
+        std::ptrdiff_t newpos;
+        if (way == std::ios_base::beg) newpos = off;
+        else if (way == std::ios_base::cur) newpos = current + off;
+        else if (way == std::ios_base::end) newpos = (end - base) + off;
+        else return pos_type(off_type(-1));
+
+        if (newpos < 0 || base + newpos > end) return pos_type(off_type(-1));
+        setg(base, base + newpos, end);
+        return pos_type(off_type(newpos));
+    }
+
+    pos_type seekpos(pos_type sp, std::ios_base::openmode mode = std::ios_base::in) override {
+        return seekoff(off_type(sp), std::ios_base::beg, mode);
+    }
 protected:
     int_type underflow() override {
+        if (gptr() < egptr()) {
+            return traits_type::to_int_type(*gptr());
+        }
         return traits_type::eof();
     }
 

src/io/path.hpp

@@ -33,6 +33,8 @@ namespace io {
             }
         }
 
+        path(std::string_view str) : path(std::string(str)) {}
+
         path(const char* str) : path(std::string(str)) {}
 
         bool operator==(const std::string& other) const {

src/logic/ChunksController.cpp

@@ -25,7 +25,7 @@ const uint MIN_SURROUNDING = 9;
 ChunksController::ChunksController(Level& level)
     : level(level),
       generator(std::make_unique<WorldGenerator>(
-          level.content.generators.require(level.getWorld()->getGenerator()),
+          level.content.generators.require(level.environment.generator),
           level.content,
           level.getWorld()->getSeed()
       )) {}

src/logic/EngineController.cpp

@@ -179,7 +179,7 @@ void EngineController::onMissingContent(
     if (engine.isHeadless()) {
         throw std::runtime_error(
             "missing content: " +
-            json::stringify(create_missing_content_report(report), true, "  ")
+            util::quote(json::stringify(create_missing_content_report(report), true, "  "))
         );
     } else {
         engine.setScreen(std::make_shared<MenuScreen>(engine));
@@ -268,7 +268,7 @@ inline uint64_t str2seed(const std::string& seedstr) {
 void EngineController::createWorld(
     const std::string& name,
     const std::string& seedstr,
-    const std::string& generatorID
+    const std::string& environment
 ) {
     uint64_t seed = str2seed(seedstr);
 
@@ -279,17 +279,31 @@ void EngineController::createWorld(
         paths.setCurrentWorldFolder(folder);
         engine.getContentControl().loadContent();
     });
+    const auto& generators = engine.getContentControl().get()->generators;
+
+    // generator-based environments must die in 1.0
+    bool genBasedEnv = false;
+    if (auto genDef = generators.find(environment)) {
+        genBasedEnv = true;
+    }
 
     auto& contentControl = engine.getContentControl();
     auto level = World::create(
         name,
-        generatorID,
+        genBasedEnv ? "" : environment,
+        genBasedEnv ? environment : "",
         folder,
         seed,
         engine.getSettings(),
         *contentControl.get(),
         contentControl.getContentPacks()
     );
+
+    // generator-based environment initialization
+    if (genBasedEnv) {
+        level->environment.generator = environment;
+    }
+
     if (!engine.isHeadless()) {
         level->players->create(localPlayer);
     }

src/logic/LevelController.cpp

@@ -149,7 +149,7 @@ void LevelController::saveWorld() {
     world->wfile->createDirectories();
     scripting::on_world_save();
     level->onSave();
-    level->getWorld()->write(level.get());
+    level->getWorld()->write(*level);
 }
 
 void LevelController::onWorldQuit() {

src/logic/scripting/descriptors_manager.cpp

@@ -1,104 +0,0 @@
-#include "logic/scripting/descriptors_manager.hpp"
-
-#include "debug/Logger.hpp"
-
-static debug::Logger logger("descriptors-manager");
-
-namespace scripting {
-
-    std::vector<std::optional<StreamDescriptor>> descriptors_manager::descriptors;
-
-    std::istream* descriptors_manager::get_input(int descriptor) {
-        if (!is_readable(descriptor))
-            return nullptr;
-
-        return descriptors[descriptor]->in.get();
-    }
-
-    std::ostream* descriptors_manager::get_output(int descriptor) {
-        if (!is_writeable(descriptor))
-            return nullptr;
-
-        return descriptors[descriptor]->out.get();
-    }
-
-    void descriptors_manager::flush(int descriptor) {
-        if (is_writeable(descriptor)) {
-            descriptors[descriptor]->out->flush();
-        }
-    }
-
-    bool descriptors_manager::has_descriptor(int descriptor) {
-        return is_readable(descriptor) || is_writeable(descriptor);
-    }
-
-    bool descriptors_manager::is_readable(int descriptor) {
-        return descriptor >= 0 && descriptor < static_cast<int>(descriptors.size())
-            && descriptors[descriptor].has_value()
-            && descriptors[descriptor]->in != nullptr;
-    }
-
-    bool descriptors_manager::is_writeable(int descriptor) {
-        return descriptor >= 0 && descriptor < static_cast<int>(descriptors.size())
-            && descriptors[descriptor].has_value()
-            && descriptors[descriptor]->out != nullptr;
-    }
-
-    void descriptors_manager::close(int descriptor) {
-        if (descriptor >= 0 && descriptor < static_cast<int>(descriptors.size())) {
-            if (descriptors[descriptor].has_value()) {
-                auto& desc = descriptors[descriptor].value();
-
-                if (desc.out)
-                    desc.out->flush();
-
-                desc.in.reset();
-                desc.out.reset();
-            }
-
-            descriptors[descriptor].reset();
-
-            descriptors[descriptor] = std::nullopt;
-        }
-    }
-
-    int descriptors_manager::open_descriptor(const io::path& path, bool write, bool read) {
-        std::unique_ptr<std::istream> in;
-        std::unique_ptr<std::ostream> out;
-
-        try {
-            if (read)
-                in = io::read(path);
-
-            if (write)
-                out = io::write(path);
-        } catch (const std::exception& e) {
-            logger.error() << "failed to open descriptor for " << path.string()
-                           << ": " << e.what();
-
-            return -1;
-        }
-
-        for (int i = 0; i < static_cast<int>(descriptors.size()); ++i) {
-            if (!descriptors[i].has_value()) {
-                descriptors[i] = StreamDescriptor{ std::move(in), std::move(out) };
-                return i;
-            }
-        }
-
-        descriptors.emplace_back(StreamDescriptor{ std::move(in), std::move(out) });
-
-        return static_cast<int>(descriptors.size() - 1);
-    }
-
-
-    void descriptors_manager::close_all_descriptors() {
-        for (int i = 0; i < static_cast<int>(descriptors.size()); ++i) {
-            if (descriptors[i].has_value()) {
-                close(i);
-            }
-        }
-        
-        descriptors.clear();
-    }
-}

src/logic/scripting/descriptors_manager.hpp

@@ -1,39 +0,0 @@
-#pragma once
-
-#include <memory>
-#include <vector>
-#include <optional>
-#include <string>
-#include <istream>
-#include <ostream>
-
-#include "io/io.hpp"
-
-namespace scripting {
-
-    struct StreamDescriptor {
-        std::unique_ptr<std::istream> in;
-        std::unique_ptr<std::ostream> out;
-    };
-
-    class descriptors_manager {
-    private:
-        static std::vector<std::optional<StreamDescriptor>> descriptors;
-
-    public:
-        static std::istream* get_input(int descriptor);
-        static std::ostream* get_output(int descriptor);
-
-        static void flush(int descriptor);
-
-        static bool has_descriptor(int descriptor);
-
-        static bool is_readable(int descriptor);
-        static bool is_writeable(int descriptor);
-
-        static void close(int descriptor);
-        static int open_descriptor(const io::path& path, bool write, bool read);
-
-        static void close_all_descriptors();
-    };
-}

src/logic/scripting/io_descriptors.cpp

@@ -0,0 +1,160 @@
+#include "logic/scripting/io_descriptors.hpp"
+
+#include "debug/Logger.hpp"
+#include "io/io.hpp"
+
+#include <memory>
+#include <string>
+#include <vector>
+#include <optional>
+
+static debug::Logger logger("descriptors-manager");
+
+using namespace scripting;
+
+namespace {
+    struct StreamDescriptor {
+        // TODO: std::iostream?
+        std::unique_ptr<std::istream> in;
+        std::unique_ptr<std::ostream> out;
+    };
+    std::vector<std::optional<StreamDescriptor>> descriptors;
+}
+
+std::istream* io_descriptors::get_input(int id) {
+    if (!is_readable(id)) {
+        return nullptr;
+    }
+    return ::descriptors[id]->in.get();
+}
+
+std::ostream* io_descriptors::get_output(int id) {
+    if (!is_writeable(id)) {
+        return nullptr;
+    }
+    return ::descriptors[id]->out.get();
+}
+
+static StreamDescriptor& require_descriptor(int id) {
+    if (!io_descriptors::has_descriptor(id)) {
+        throw std::runtime_error(
+            "io-descriptor with id " + std::to_string(id) + " does not exists"
+        );
+    }
+    return *::descriptors[id];
+}
+
+std::istream& io_descriptors::require_input(int id) {
+    const auto& descriptor = require_descriptor(id);
+    if (descriptor.in) {
+        return *descriptor.in;
+    }
+    throw std::runtime_error("io-descriptor is not readable");
+}
+
+std::ostream& io_descriptors::require_output(int id) {
+    const auto& descriptor = require_descriptor(id);
+    if (descriptor.out) {
+        return *descriptor.out;
+    }
+    throw std::runtime_error("io-descriptor is not writeable");
+}
+
+void io_descriptors::flush(int id) {
+    if (is_writeable(id)) {
+        ::descriptors[id]->out->flush();
+    }
+}
+
+int io_descriptors::available(int id) {
+    if (!is_readable(id))
+        return 0;
+
+    auto* stream = descriptors[id]->in.get();
+
+    auto current_pos = stream->tellg();
+
+    if (current_pos == -1) {
+        return 0;
+    }
+
+    stream->seekg(0, std::ios::end);
+
+    auto end_pos = stream->tellg();
+
+    stream->seekg(current_pos,  std::ios::beg);
+
+    auto remaining = end_pos - current_pos;
+
+    if (remaining > std::numeric_limits<int>::max()) {
+        return std::numeric_limits<int>::max();
+    }
+
+    return static_cast<int>(remaining);
+}
+
+bool io_descriptors::has_descriptor(int id) {
+    return id >= 0 && id < static_cast<int>(::descriptors.size()) &&
+           ::descriptors[id].has_value();
+}
+
+bool io_descriptors::is_readable(int id) {
+    return has_descriptor(id) && ::descriptors[id]->in != nullptr;
+}
+
+bool io_descriptors::is_writeable(int id) {
+    return id >= 0 && id < static_cast<int>(::descriptors.size())
+        && ::descriptors[id].has_value()
+        && ::descriptors[id]->out != nullptr;
+}
+
+void io_descriptors::close(int id) {
+    if (!has_descriptor(id)) {
+        return;
+    }
+    auto& desc = ::descriptors[id].value();
+    if (desc.out) {
+        desc.out->flush();
+    }
+    desc.in.reset();
+    desc.out.reset();
+    ::descriptors[id] = std::nullopt;
+}
+
+int io_descriptors::open_descriptor(const io::path& path, bool write, bool read) {
+    std::unique_ptr<std::istream> in;
+    std::unique_ptr<std::ostream> out;
+
+    try {
+        if (read) {
+            in = io::read(path);
+        }
+        if (write) {
+            out = io::write(path);
+        }
+    } catch (const std::exception& e) {
+        logger.error() << "failed to open descriptor for " << path.string()
+                        << ": " << e.what();
+        return -1;
+    }
+
+    for (int i = 0; i < static_cast<int>(descriptors.size()); ++i) {
+        if (!descriptors[i].has_value()) {
+            descriptors[i] = StreamDescriptor{ std::move(in), std::move(out) };
+            return i;
+        }
+    }
+
+    ::descriptors.emplace_back(StreamDescriptor{ std::move(in), std::move(out) });
+    return static_cast<int>(::descriptors.size() - 1);
+}
+
+
+void io_descriptors::close_all_descriptors() {
+    for (int i = 0; i < static_cast<int>(::descriptors.size()); ++i) {
+        if (::descriptors[i].has_value()) {
+            close(i);
+        }
+    }
+    ::descriptors.clear();
+}

src/logic/scripting/io_descriptors.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <istream>
+#include <ostream>
+
+#include "io/fwd.hpp"
+
+namespace scripting::io_descriptors {
+    std::istream* get_input(int id);
+    std::ostream* get_output(int id);
+
+    std::istream& require_input(int id);
+    std::ostream& require_output(int id);
+
+    void flush(int id);
+    int available(int id);
+
+    bool has_descriptor(int id);
+
+    bool is_readable(int id);
+    bool is_writeable(int id);
+
+    void close(int id);
+    int open_descriptor(const io::path& path, bool write, bool read);
+
+    void close_all_descriptors();
+}

src/logic/scripting/lua/libs/api_lua.hpp

@@ -44,6 +44,7 @@ extern const luaL_Reg posteffectslib[]; // gfx.posteffects
 extern const luaL_Reg quatlib[];
 extern const luaL_Reg randomlib[];
 extern const luaL_Reg compressionlib[];
+extern const luaL_Reg testlib[];
 extern const luaL_Reg text3dlib[]; // gfx.text3d
 extern const luaL_Reg timelib[];
 extern const luaL_Reg tomllib[];

src/logic/scripting/lua/libs/libapp.cpp

@@ -20,8 +20,14 @@
 #include "window/Window.hpp"
 #include "world/Level.hpp"
 
+#include <array>
+
 using namespace scripting;
 
+namespace {
+    static std::array<std::unique_ptr<Process>, MAX_SUBPROCESSES> processes;
+}
+
 /// @brief Check if content is loaded
 static int l_is_content_loaded(lua::State* L) {
     return lua::pushboolean(L, content != nullptr);
@@ -337,6 +343,10 @@ static int l_start_debug_instance(lua::State* L) {
     if (!engine->getProject().permissions.has(Permissions::DEBUGGING)) {
         throw std::runtime_error("project has no debugging permission");
     }
+    const auto& params = engine->getCoreParameters();
+    if (params.subProcessDepth >= MAX_SUBPROCESS_DEPTH) {
+        throw std::runtime_error("max subprocess depth exceeded");
+    }
 
     int port = lua::tointeger(L, 1);
     if (port == 0) {
@@ -357,6 +367,8 @@ static int l_start_debug_instance(lua::State* L) {
         "--res", paths.getResourcesFolder().u8string(),
         "--dir", paths.getUserFilesFolder().u8string(),
         "--dbg-server",  "tcp:" + std::to_string(port),
+        "--sub-depth", std::to_string(engine->getCoreParameters()
+            .subProcessDepth + 1),
     };
     if (!projectPath.empty()) {
         args.emplace_back("--project");
@@ -365,11 +377,76 @@ static int l_start_debug_instance(lua::State* L) {
 
     platform::new_engine_instance(
         std::move(args),
-        outputPath.empty() ? "" : io::resolve(std::string(outputPath))
+        outputPath.empty() ? "" : io::resolve(std::string(outputPath)),
+        false
     );
     return lua::pushinteger(L, port);
 }
 
+static int l_start_background_instance(lua::State* L) {
+    if (!engine->getProject().permissions.has(Permissions::SUB_INSTANCES)) {
+        throw std::runtime_error("project has no sub-instances permission");
+    }
+    const auto& params = engine->getCoreParameters();
+    if (params.subProcessDepth >= MAX_SUBPROCESS_DEPTH) {
+        throw std::runtime_error("max subprocess depth exceeded");
+    }
+
+    auto scriptPath = lua::require_lstring(L, 1);
+    io::path outputPath = lua::isstring(L, 2) ? lua::require_lstring(L, 2) : "";
+    const auto& paths = engine->getPaths();
+
+    std::vector<std::string> args {
+        "--headless",
+        "--res", paths.getResourcesFolder().u8string(),
+        "--dir", paths.getUserFilesFolder().u8string(),
+        "--script", io::resolve(scriptPath).u8string(),
+        "--sub-depth", std::to_string(engine->getCoreParameters()
+            .subProcessDepth + 1),
+        "--log", io::resolve(outputPath).u8string(),
+    };
+    args.emplace_back("--project");
+    args.emplace_back(io::resolve(engine->getProject().path).u8string());
+
+    int handle = -1;
+    for (int i = 0; i < ::processes.size(); i++) {
+        if (!::processes[i] || !::processes[i]->isActive()) {
+            handle = i;
+            break;
+        }
+    }
+    if (handle == -1) {
+        throw std::runtime_error("sub-processes limit exceeded");
+    }
+    ::processes[handle] =
+        platform::new_engine_instance(std::move(args), "", true);
+
+    return lua::pushinteger(L, handle);
+}
+
+static int l_is_instance_alive(lua::State* L) {
+    int handle = lua::tointeger(L, 1);
+    if (handle < 0 || handle >= ::processes.size()) {
+        throw std::runtime_error("invalid process handle");
+    }
+    auto& process = ::processes[handle];
+    return lua::pushboolean(L, process && process->isActive());
+}
+
+static int l_terminate_instance(lua::State* L) {
+    int handle = lua::tointeger(L, 1);
+    if (handle < 0 || handle >= ::processes.size()) {
+        throw std::runtime_error("invalid process handle");
+    }
+    auto& process = ::processes[handle];
+    if (process == nullptr) {
+        return lua::pushboolean(L, false);
+    }
+    bool active = process->isActive();
+    process.reset();
+    return lua::pushboolean(L, active);
+}
+
 const luaL_Reg applib[] = {
     /// content
     {"is_content_loaded", lua::wrap<l_is_content_loaded>},
@@ -402,5 +479,8 @@ const luaL_Reg applib[] = {
     {"get_version", lua::wrap<l_get_version>},
     {"create_memory_device", lua::wrap<l_create_memory_device>},
     {"start_debug_instance", lua::wrap<l_start_debug_instance>},
+    {"start_background_instance", lua::wrap<l_start_background_instance>},
+    {"is_instance_alive", lua::wrap<l_is_instance_alive>},
+    {"terminate_instance", lua::wrap<l_terminate_instance>},
     {nullptr, nullptr}
 };