Method LightChunk

src/LightingThread.cpp:213–291

void cLightingThread::LightChunk(cLightingChunkStay & a_Item)
{
	cChunkDef::BlockNibbles BlockLight, SkyLight;
	
	ReadChunks(a_Item.m_ChunkX, a_Item.m_ChunkZ);
	
	PrepareBlockLight();
	CalcLight(m_BlockLight);
	
	PrepareSkyLight();
	
	/*
	// DEBUG: Save chunk data with highlighted seeds for visual inspection:
	cFile f4;
	if (
		f4.Open(Printf("Chunk_%d_%d_seeds.grab", a_Item.x, a_Item.z), cFile::fmWrite)
	)
	{
		for (int z = 0; z < cChunkDef::Width * 3; z++)
		{
			for (int y = cChunkDef::Height / 2; y >= 0; y--)
			{
				unsigned char Seeds     [cChunkDef::Width * 3];
				memcpy(Seeds, m_BlockTypes + y * BlocksPerYLayer + z * cChunkDef::Width * 3, cChunkDef::Width * 3);
				for (int x = 0; x < cChunkDef::Width * 3; x++)
				{
					if (m_IsSeed1[y * BlocksPerYLayer + z * cChunkDef::Width * 3 + x])
					{
						Seeds[x] = E_BLOCK_DIAMOND_BLOCK;
					}
				}
				f4.Write(Seeds, cChunkDef::Width * 3);
			}
		}
	}
	//*/
	
	CalcLight(m_SkyLight);
	
	/*
	// DEBUG: Save XY slices of the chunk data and lighting for visual inspection:
	cFile f1, f2, f3;
	if (
		f1.Open(Printf("Chunk_%d_%d_data.grab",  a_Item.x, a_Item.z), cFile::fmWrite) &&
		f2.Open(Printf("Chunk_%d_%d_sky.grab",   a_Item.x, a_Item.z), cFile::fmWrite) &&
		f3.Open(Printf("Chunk_%d_%d_glow.grab",  a_Item.x, a_Item.z), cFile::fmWrite)
	)
	{
		for (int z = 0; z < cChunkDef::Width * 3; z++)
		{
			for (int y = cChunkDef::Height / 2; y >= 0; y--)
			{
				f1.Write(m_BlockTypes + y * BlocksPerYLayer + z * cChunkDef::Width * 3, cChunkDef::Width * 3);
				unsigned char SkyLight  [cChunkDef::Width * 3];
				unsigned char BlockLight[cChunkDef::Width * 3];
				for (int x = 0; x < cChunkDef::Width * 3; x++)
				{
					SkyLight[x]   = m_SkyLight  [y * BlocksPerYLayer + z * cChunkDef::Width * 3 + x] << 4;