Method LoadFloors

PanzerChasm/client/map_drawer_gl.cpp:983–1032

}

void MapDrawerGL::LoadFloors( const MapData& map_data )
{
	std::vector<FloorVertex> floors_vertices;
	for( unsigned int floor_or_ceiling= 0u; floor_or_ceiling < 2u; floor_or_ceiling++ )
	{
		floors_geometry_info[ floor_or_ceiling ].first_vertex_number= floors_vertices.size();

		const unsigned char* const in_data= floor_or_ceiling == 0u ? map_data.floor_textures : map_data.ceiling_textures;

		for( unsigned int x= 0u; x < MapData::c_map_size; x++ )
		for( unsigned int y= 0u; y < MapData::c_map_size; y++ )
		{
			const unsigned char texture_number= in_data[ x + y * MapData::c_map_size ];

			if( texture_number == MapData::c_empty_floor_texture_id ||
				texture_number == MapData::c_sky_floor_texture_id )
				continue;

			floors_vertices.resize( floors_vertices.size() + 6u );
			FloorVertex* v= floors_vertices.data() + floors_vertices.size() - 6u;

			v[0].xy[0]= x   ;  v[0].xy[1]= y;
			v[1].xy[0]= x+1u;  v[1].xy[1]= y;
			v[2].xy[0]= x+1u;  v[2].xy[1]= y+1u;
			v[3].xy[0]= x   ;  v[3].xy[1]= y+1u;

			v[0].texture_id= v[1].texture_id= v[2].texture_id= v[3].texture_id= texture_number;
			v[4]= v[0];
			v[5]= v[2];
		} // for xy

		floors_geometry_info[ floor_or_ceiling ].vertex_count=
			floors_vertices.size() - floors_geometry_info[ floor_or_ceiling ].first_vertex_number;
	} // for floor and ceiling

	floors_geometry_.VertexData(
		floors_vertices.data(),
		floors_vertices.size() * sizeof(FloorVertex),
		sizeof(FloorVertex) );

	FloorVertex v;

	floors_geometry_.VertexAttribPointer(
		0, 2, GL_UNSIGNED_BYTE, false,
		((char*)v.xy) - ((char*)&v) );

	floors_geometry_.VertexAttribPointerInt(
		1, 1, GL_UNSIGNED_BYTE,
		((char*)&v.texture_id) - ((char*)&v) );
}

void MapDrawerGL::LoadWalls( const MapData& map_data )
{