text: #ifndef BLOCK_TERRAIN_STRUCTURE_H
  #define BLOCK_TERRAIN_STRUCTURE_H
  /*
  Copyright (c) 2019-2022 Péter Magyar
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
  */
  
  #include "core/vector.h"
  
  #include "terrain_structure.h"
  
  #include "../defines.h"
  
  #include "core/pool_vector.h"
  
  #include "terrain_chunk.h"
  
  class BlockTerrainStructure : public TerrainStructure {
  	GDCLASS(BlockTerrainStructure, TerrainStructure);
  
  public:
  	int get_channel_type() const;
  	void set_channel_type(const int value);
  
  	int get_channel_isolevel() const;
  	void set_channel_isolevel(const int value);
  
  	int get_voxel_type(int p_x, int p_y, int p_z) const;
  	int get_voxel_isolevel(int p_x, int p_y, int p_z) const;
  
  	void set_voxel(int p_x, int p_y, int p_z, int p_type, int p_isolevel);
  
  	void _write_to_chunk(Ref<TerrainChunk> chunk);
  
  	void clear();
  
  	BlockTerrainStructure();
  	~BlockTerrainStructure();
  
  protected:
  	static void _bind_methods();
  
  public:
  	struct DataEntry {
  		int x;
  		int y;
  		int z;
  		int data_type;
  		int data_isolevel;
  	};
  
  private:
  	int _channel_type;
  	int _channel_isolevel;
  
  	Vector<DataEntry> _data;
  };
  
  #endif
  