Method GetHeight

src/ChunkMap.cpp:1018–1040

int  cChunkMap::GetHeight(int a_BlockX, int a_BlockZ)
{
	for (;;)
	{
		cCSLock Lock(m_CSLayers);
		int ChunkX, ChunkZ, BlockY = 0;
		cChunkDef::AbsoluteToRelative(a_BlockX, BlockY, a_BlockZ, ChunkX, ChunkZ);
		cChunkPtr Chunk = GetChunk(ChunkX, ZERO_CHUNK_Y, ChunkZ);
		if (Chunk == NULL)
		{
			return 0;
		}
		
		if (Chunk->IsValid())
		{
			return Chunk->GetHeight(a_BlockX, a_BlockZ);
		}

		// The chunk is not valid, wait for it to become valid:
		cCSUnlock Unlock(Lock);
		m_evtChunkValid.Wait();
	}  // while (true)
}