add ladder block rotation

src/content/loading/BlockLoader.cpp

@@ -151,6 +151,8 @@ template<> void ContentUnitLoader<Block>::loadUnit(
         def.rotations = BlockRotProfile::PANE;
     } else if (profile == BlockRotProfile::STAIRS_NAME) {
         def.rotations = BlockRotProfile::STAIRS;
+    } else if (profile == BlockRotProfile::LADDER_NAME) {
+        def.rotations = BlockRotProfile::LADDER;
     } else if (profile != "none") {
         logger.error() << "unknown rotation profile " << profile;
         def.rotatable = false;

src/logic/PlayerController.cpp

@@ -340,6 +340,19 @@ static int determine_rotation(
                 if (camDir.z > 0.0f) return BLOCK_DIR_SOUTH | verticalBit;
                 if (camDir.z < 0.0f) return BLOCK_DIR_NORTH | verticalBit;
             }
+        } else if (name == "ladder") {
+            if (norm.x < 0.0f) return BLOCK_DIR_EAST;
+            if (norm.x > 0.0f) return BLOCK_DIR_WEST;
+            if (norm.z > 0.0f) return BLOCK_DIR_NORTH;
+            if (norm.z < 0.0f) return BLOCK_DIR_SOUTH;
+            if (abs(camDir.x) > abs(camDir.z)) {
+                if (camDir.x > 0.0f) return BLOCK_DIR_EAST;
+                if (camDir.x < 0.0f) return BLOCK_DIR_WEST;
+            }
+            if (abs(camDir.x) < abs(camDir.z)) {
+                if (camDir.z > 0.0f) return BLOCK_DIR_SOUTH;
+                if (camDir.z < 0.0f) return BLOCK_DIR_NORTH;
+            }
         }
     }
     return 0;

src/voxels/Block.cpp

@@ -109,6 +109,17 @@ const BlockRotProfile BlockRotProfile::STAIRS {
     8
 };
 
+const BlockRotProfile BlockRotProfile::LADDER {
+    "ladder",
+    {
+        {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}},    // North
+        {{0, 0, -1}, {0, 1, 0}, {1, 0, 0}},   // East
+        {{-1, 0, 0}, {0, 1, 0}, {0, 0, -1}},  // South
+        {{0, 0, 1}, {0, 1, 0}, {-1, 0, 0}},   // West
+    },
+    4
+};
+
 Block::Block(const std::string& name)
     : name(name), caption(util::id_to_caption(name)) {
     for (int i = 0; i < defaults.textureFaces.size(); i++) {

src/voxels/Block.hpp

@@ -90,9 +90,13 @@ struct BlockRotProfile {
     /// @brief Stairs, stairs and stairs
     static const BlockRotProfile STAIRS;
 
+    /// @brief Ladders, wall signs, paintings
+    static const BlockRotProfile LADDER;
+
     static inline std::string PIPE_NAME = "pipe";
     static inline std::string PANE_NAME = "pane";
     static inline std::string STAIRS_NAME = "stairs";
+    static inline std::string LADDER_NAME = "ladder";
 };
 
 enum class BlockModelType {

src/world/generator/VoxelFragment.cpp

@@ -219,7 +219,8 @@ std::unique_ptr<VoxelFragment> VoxelFragment::rotated(const Content& content) co
                                     | ((voxel.state.segment & 0b100) >> 2);
                 auto& def = content.blocks.require(blockNames[voxel.id]);
                 if (def.rotations.name == BlockRotProfile::PANE_NAME ||
-                      def.rotations.name == BlockRotProfile::PIPE_NAME) {
+                      def.rotations.name == BlockRotProfile::PIPE_NAME ||
+                      def.rotations.name == BlockRotProfile::LADDER_NAME) {
                     if (voxel.state.rotation < 4) {
                         voxel.state.rotation = (voxel.state.rotation + 3) & 0b11;
                     }