private void SpreadBlockLight(IBoundedLitBlockCollection[,] chunkMap, int lx, int ly, int lz)
{
BlockInfo primary = _blockset.GetInfo(lx, ly, lz);
int primaryLight = _blockset.GetBlockLight(lx, ly, lz);
int priLum = Math.Max(primary.Luminance - primary.Opacity, 0);
if (primaryLight < priLum)
{
_blockset.SetBlockLight(lx, ly, lz, priLum);
}
if (primaryLight > primary.Luminance - 1 && !primary.TransmitsLight)
{
return;
}
int xdim = _xdim;
int ydim = _ydim;
int zdim = _zdim;
Queue <LightRecord> spread = new Queue <LightRecord>();
if (ly > 0)
{
spread.Enqueue(new LightRecord(lx, ly - 1, lz, primary.Luminance - 1));
}
if (ly < ydim - 1)
{
spread.Enqueue(new LightRecord(lx, ly + 1, lz, primary.Luminance - 1));
}
spread.Enqueue(new LightRecord(lx - 1, ly, lz, primary.Luminance - 1));
spread.Enqueue(new LightRecord(lx + 1, ly, lz, primary.Luminance - 1));
spread.Enqueue(new LightRecord(lx, ly, lz - 1, primary.Luminance - 1));
spread.Enqueue(new LightRecord(lx, ly, lz + 1, primary.Luminance - 1));
while (spread.Count > 0)
{
LightRecord rec = spread.Dequeue();
int xi = rec.x + xdim;
int zi = rec.z + zdim;
IBoundedLitBlockCollection cc = chunkMap[xi / xdim, zi / zdim];
if (cc == null)
{
continue;
}
int x = xi % xdim;
int y = rec.y;
int z = zi % zdim;
BlockInfo info = cc.GetInfo(x, y, z);
int light = cc.GetBlockLight(x, y, z);
int dimStr = Math.Max(rec.str - info.Opacity, 0);
if (dimStr > light)
{
cc.SetBlockLight(x, y, z, dimStr);
if (info.TransmitsLight)
{
int strength = (info.Opacity > 0) ? dimStr : dimStr - 1;
if (rec.y > 0)
{
spread.Enqueue(new LightRecord(rec.x, rec.y - 1, rec.z, strength));
}
if (rec.y < ydim - 1)
{
spread.Enqueue(new LightRecord(rec.x, rec.y + 1, rec.z, strength));
}
spread.Enqueue(new LightRecord(rec.x - 1, rec.y, rec.z, strength));
spread.Enqueue(new LightRecord(rec.x + 1, rec.y, rec.z, strength));
spread.Enqueue(new LightRecord(rec.x, rec.y, rec.z - 1, strength));
spread.Enqueue(new LightRecord(rec.x, rec.y, rec.z + 1, strength));
}
}
}
}
private void UpdateBlockLight()
{
IBoundedLitBlockCollection[,] chunkMap = LocalBlockLightMap();
int xdim = _xdim;
int ydim = _ydim;
int zdim = _zdim;
while (_update.Count > 0)
{
BlockKey k = _update.Dequeue();
int index = LightBitmapIndex(k);
_lightbit[index] = false;
int xi = k.x + xdim;
int zi = k.z + zdim;
IBoundedLitBlockCollection cc = chunkMap[xi / xdim, zi / zdim];
if (cc == null)
{
continue;
}
int lle = NeighborLight(chunkMap, k.x, k.y, k.z - 1);
int lln = NeighborLight(chunkMap, k.x - 1, k.y, k.z);
int lls = NeighborLight(chunkMap, k.x, k.y, k.z + 1);
int llw = NeighborLight(chunkMap, k.x + 1, k.y, k.z);
int lld = NeighborLight(chunkMap, k.x, k.y - 1, k.z);
int llu = NeighborLight(chunkMap, k.x, k.y + 1, k.z);
int x = xi % xdim;
int y = k.y;
int z = zi % zdim;
int lightval = cc.GetBlockLight(x, y, z);
BlockInfo info = cc.GetInfo(x, y, z);
int light = Math.Max(info.Luminance, 0);
light = Math.Max(light, lle);
light = Math.Max(light, lln);
light = Math.Max(light, lls);
light = Math.Max(light, llw);
light = Math.Max(light, lld);
light = Math.Max(light, llu);
light = Math.Max(light - info.Opacity, 0);
if (light != lightval)
{
//Console.WriteLine("Block Light: ({0},{1},{2}) " + lightval + " -> " + light, k.x, k.y, k.z);
cc.SetBlockLight(x, y, z, light);
if (info.TransmitsLight)
{
if (k.y > 0)
{
QueueRelight(new BlockKey(k.x, k.y - 1, k.z));
}
if (k.y < ydim - 1)
{
QueueRelight(new BlockKey(k.x, k.y + 1, k.z));
}
QueueRelight(new BlockKey(k.x - 1, k.y, k.z));
QueueRelight(new BlockKey(k.x + 1, k.y, k.z));
QueueRelight(new BlockKey(k.x, k.y, k.z - 1));
QueueRelight(new BlockKey(k.x, k.y, k.z + 1));
}
}
}
}
