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Fixed skylight going down through transparent blocks.

This commit is contained in:
Mattes D 2017-06-08 18:48:15 +02:00 committed by Lukas Pioch
parent 4e0ae63ec2
commit c82facab1b
1 changed files with 12 additions and 1 deletions
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13
src/LightingThread.cpp
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@ -368,7 +368,18 @@ void cLightingThread::PrepareSkyLight(void)
for (int x = 1; x < cChunkDef::Width * 3 - 1; x++)
{
int idx = BaseZ + x;
int Current = m_HeightMap[idx] + 1;
// Find the lowest block in this column that receives full sunlight (go through transparent blocks):
int Current = m_HeightMap[idx];
ASSERT(Current < cChunkDef::Height);
while (
(Current >= 0) &&
cBlockInfo::IsTransparent(m_BlockTypes[idx + Current * BlocksPerYLayer])
)
{
Current -= 1; // Sunlight goes down unchanged through this block
}
Current += 1; // Point to the last sunlit block, rather than the first non-transparent one
// The other neighbors don't need transparent-block-checking. At worst we'll have a few dud seeds above the ground.
int Neighbor1 = m_HeightMap[idx + 1] + 1; // X + 1
int Neighbor2 = m_HeightMap[idx - 1] + 1; // X - 1
int Neighbor3 = m_HeightMap[idx + cChunkDef::Width * 3] + 1; // Z + 1