perf: optimize chunk generation

include/Cubed/gameplay/block.hpp

@@ -17,9 +17,22 @@ struct Block : public BlockTexture{
 };
 
 struct BlockRenderData {
-    glm::vec3 pos;
     std::vector<bool> draw_face;
     unsigned block_id;
+    BlockRenderData() = default;
+    BlockRenderData(const BlockRenderData&) = default;
+    BlockRenderData& operator=(const BlockRenderData&) = default;
+    BlockRenderData(BlockRenderData&& data) :
+        draw_face(std::move(data.draw_face)),
+        block_id(data.block_id)
+    {
+        
+    }
+    BlockRenderData& operator=(BlockRenderData&& data) {
+        draw_face = std::move(data.draw_face);
+        block_id = data.block_id;
+        return *this;
+    }
 };
 
 struct LookBlock {

include/Cubed/gameplay/chunk.hpp

@@ -10,6 +10,9 @@ class World;
 
 class Chunk {
 private:
+
+    bool m_is_gened = false;
+    bool m_dirty = false;
     ChunkPos m_chunk_pos;
     World& m_world;
     // the index is a array of block id
@@ -31,7 +34,9 @@ public:
     GLuint get_vbo() const;
     const std::vector<Vertex>& get_vertex_data() const;
     void init_chunk();
-
+    bool is_dirty() const;
+    void mark_dirty();
+    void clear_dirty();
     void set_chunk_block(int index, unsigned id);
     
 };

include/Cubed/gameplay/chunk_status.hpp

@@ -11,6 +11,16 @@ struct ChunkPos {
             return h1 ^ (h2 + 0x9e3779b9 + (h1 << 6) + (h1 >> 2));
         }
     };
+
+    ChunkPos operator+(const ChunkPos& pos) const{
+        return ChunkPos{x + pos.x, z + pos.z};
+    }
+
+    ChunkPos& operator+=(const ChunkPos& pos) {
+        x += pos.x;
+        z += pos.z;
+        return *this;
+    };
 };
 
 

include/Cubed/gameplay/world.hpp

@@ -16,7 +16,7 @@ private:
     std::unordered_map<std::size_t, Player> m_players;
     std::vector<glm::vec4> m_planes;
 
-    std::pair<int, int> chunk_pos(int world_x, int world_z);
+    std::pair<int, int> chunk_pos(int world_x, int world_z) const;
     void gen_chunks();