extend libblock

doc/en/scripting/builtins/libblock.md

@@ -154,19 +154,22 @@ The function returns a table with the results or nil if the ray does not hit any
 
 The result will use the destination table instead of creating a new one if the optional argument specified.
 
-## Model
-
-Block model information.
+## Model and physics
 
 ```lua
 -- returns block model type (block/aabb/custom/...)
-block.get_model(id: int) -> str
+block.get_model(id: int, [optional] variant_index: int = 0) -> str
 
 -- returns block model name
-block.model_name(id: int) -> str
+block.model_name(id: int, [optional] variant_index: int = 0) -> str
 
 -- returns array of 6 textures assigned to sides of block
-block.get_textures(id: int) -> string table
+block.get_textures(id: int, [optional] variant_index: int = 0) -> string table
+
+-- returns array of two vectors (arrays of 3 numbers):
+-- 1. Minimum point of the hitbox
+-- 2. Hitbox size
+block.get_hitbox(id: int, rotation_index: int, [optional] hitbox_index: int = 0) -> {vec3, vec3}
 ```
 
 ## Data fields

doc/ru/scripting/builtins/libblock.md

@@ -157,19 +157,20 @@ block.seek_origin(x: int, y: int, z: int) -> int, int, int
 
 ```lua
 -- возвращает тип модели блока (block/aabb/custom/...)
-block.get_model(id: int) -> string
+block.get_model(id: int, [опционально] variant_index: int = 0) -> string
 
 -- возвращает имя модели блока
-block.model_name(id: int) -> string
+block.model_name(id: int, [опционально] variant_index: int = 0) -> string
 
 -- возвращает массив из 6 текстур, назначенных на стороны блока
-block.get_textures(id: int) -> table<string>
+block.get_textures(id: int, [опционально] variant_index: int = 0) -> table<string>
 
 -- Возвращает массив из двух векторов (массивов из 3 чисел):
 -- 1. Минимальная точка хитбокса
 -- 2. Размер хитбокса
 -- rotation_index - индекс поворота блока
-block.get_hitbox(id: int, rotation_index: int) -> {vec3, vec3}
+-- hitbox_index - индекс хитбокса
+block.get_hitbox(id: int, rotation_index: int, [опционально] hitbox_index: int = 0) -> {vec3, vec3}
 ```
 
 ## Данные блоков

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

@@ -349,11 +349,23 @@ static int l_caption(lua::State* L) {
     return 0;
 }
 
+static lua::Integer get_variant_index(lua::State* L, const Block* const block, int argumentIndex) {
+    const auto variantIndex = lua::gettop(L) >= argumentIndex ? lua::tointeger(L, argumentIndex) : 0;
+    const size_t variantsSize = block->variants->variants.size();
+    if (variantIndex < 0 || variantIndex >= variantsSize) {
+        throw std::out_of_range(
+            "variant index out of bounds [0, " + std::to_string(variantsSize - 1) + "]");
+    }
+    return variantIndex;
+}
+
 static int l_get_textures(lua::State* L) {
     if (auto def = get_block_def(L)) {
+        const auto& textureFaces = (def->variants ? def->variants->variants[get_variant_index(L, def, 2)].textureFaces :
+            def->defaults.textureFaces);
         lua::createtable(L, 6, 0);
         for (size_t i = 0; i < 6; i++) {
-            lua::pushstring(L, def->defaults.textureFaces[i]); // TODO: variant argument
+            lua::pushstring(L, textureFaces[i]);
             lua::rawseti(L, i + 1);
         }
         return 1;
@@ -364,8 +376,8 @@ static int l_get_textures(lua::State* L) {
 
 static int l_model_name(lua::State* L) {
     if (auto def = get_block_def(L)) {
-        // TODO: variant argument
-        const auto& modelName = def->defaults.model.name;
+        const auto& modelName = (def->variants ? def->variants->variants[get_variant_index(L, def, 2)].model.name :
+            def->defaults.model.name);
         if (modelName.empty()) {
             return lua::pushlstring(L, def->name + ".model");
         }
@@ -376,8 +388,9 @@ static int l_model_name(lua::State* L) {
 
 static int l_get_model(lua::State* L) {
     if (auto def = get_block_def(L)) {
-        // TODO: variant argument
-        return lua::pushlstring(L, BlockModelTypeMeta.getName(def->defaults.model.type));
+        const BlockModelType modelType = (def->variants ? def->variants->variants[get_variant_index(L, def, 2)].model.type :
+            def->defaults.model.type);
+        return lua::pushlstring(L, BlockModelTypeMeta.getName(modelType));
     }
     return 0;
 }
@@ -385,12 +398,13 @@ static int l_get_model(lua::State* L) {
 static int l_get_hitbox(lua::State* L) {
     if (auto def = get_block_def(L)) {
         size_t rotation = lua::tointeger(L, 2);
+        const size_t hitboxIndex = static_cast<size_t>(lua::gettop(L) >= 3 ? lua::tointeger(L, 3) : 0);
         if (def->rotatable) {
             rotation %= def->rotations.MAX_COUNT;
         } else {
             rotation = 0;
         }
-        auto& hitbox = def->rt.hitboxes[rotation].at(0);
+        auto& hitbox = def->rt.hitboxes[rotation].at(hitboxIndex);
         lua::createtable(L, 2, 0);
 
         lua::pushvec3(L, hitbox.min());