private bool CheckLightPropagation(ChunkLightPropagInfo info)
{
return(CheckLightPropagation(info.pos, info.propagationFlag, info.recursionDepth));
}
// Checks if neighbor chunks should have light propagated
// MUST BE USED AFTER THE CalculateLightMap FUNCTION
// Returns true if should update current chunk and false if not
public bool CheckLightPropagation(ChunkPos pos, byte flag = 255, int recursionDepth = 0)
{
byte propagationFlag;
ChunkPos neighbor;
bool updateCurrent = false;
byte updateCode = 0;
if (recursionDepth >= 5)
{
return(false);
}
if (flag == 255)
{
propagationFlag = this.chunks[pos].data.GetPropagationFlag();
}
else
{
propagationFlag = flag;
}
// None
if (propagationFlag == 0)
{
return(false);
}
// xm
if ((propagationFlag & 1) != 0)
{
neighbor = new ChunkPos(pos.x - 1, pos.z);
if (this.chunks.ContainsKey(neighbor))
{
updateCode = VoxelData.PropagateLight(this.chunks[pos].data, this.chunks[neighbor].data, 0);
if ((updateCode & 4) == 4)
{
AddToUpdate(neighbor, noLight: false);
}
if (((updateCode & 7) == 2 || (updateCode & 7) == 3) && (updateCode & 4) != 4)
{
AddToUpdate(neighbor, noLight: true);
}
if ((updateCode & 7) == 1 || (updateCode & 7) == 3)
{
AddToUpdate(pos, noLight: true);
}
if (updateCode >= 8)
{
toCallLightCascade.Add(new ChunkLightPropagInfo(neighbor, (byte)(updateCode >> 3), recursionDepth + 1));
}
}
}
// xp
if ((propagationFlag & 2) != 0)
{
neighbor = new ChunkPos(pos.x + 1, pos.z);
if (this.chunks.ContainsKey(neighbor))
{
updateCode = VoxelData.PropagateLight(this.chunks[pos].data, this.chunks[neighbor].data, 1);
if ((updateCode & 4) == 4)
{
AddToUpdate(neighbor, noLight: false);
}
if (((updateCode & 7) == 2 || (updateCode & 7) == 3) && (updateCode & 4) != 4)
{
AddToUpdate(neighbor, noLight: true);
}
if ((updateCode & 7) == 1 || (updateCode & 7) == 3)
{
AddToUpdate(pos, noLight: true);
}
if (updateCode >= 8)
{
toCallLightCascade.Add(new ChunkLightPropagInfo(neighbor, (byte)(updateCode >> 3), recursionDepth + 1));
}
}
}
// zm
if ((propagationFlag & 4) != 0)
{
neighbor = new ChunkPos(pos.x, pos.z - 1);
if (this.chunks.ContainsKey(neighbor))
{
updateCode = VoxelData.PropagateLight(this.chunks[pos].data, this.chunks[neighbor].data, 2);
if ((updateCode & 4) == 4)
{
AddToUpdate(neighbor, noLight: false);
}
if (((updateCode & 7) == 2 || (updateCode & 7) == 3) && (updateCode & 4) != 4)
{
AddToUpdate(neighbor, noLight: true);
}
if ((updateCode & 7) == 1 || (updateCode & 7) == 3)
{
AddToUpdate(pos, noLight: true);
}
if (updateCode >= 8)
{
toCallLightCascade.Add(new ChunkLightPropagInfo(neighbor, (byte)(updateCode >> 3), recursionDepth + 1));
}
}
}
// zp
if ((propagationFlag & 8) != 0)
{
neighbor = new ChunkPos(pos.x, pos.z + 1);
if (this.chunks.ContainsKey(neighbor))
{
updateCode = VoxelData.PropagateLight(this.chunks[pos].data, this.chunks[neighbor].data, 3);
if ((updateCode & 4) == 4)
{
AddToUpdate(neighbor, noLight: false);
}
if (((updateCode & 7) == 2 || (updateCode & 7) == 3) && (updateCode & 4) != 4)
{
AddToUpdate(neighbor, noLight: true);
}
if ((updateCode & 7) == 1 || (updateCode & 7) == 3)
{
AddToUpdate(pos, noLight: true);
}
if (updateCode >= 8)
{
toCallLightCascade.Add(new ChunkLightPropagInfo(neighbor, (byte)(updateCode >> 3), recursionDepth + 1));
}
}
}
while (toCallLightCascade.Count > 0)
{
ChunkLightPropagInfo info = toCallLightCascade[0];
toCallLightCascade.RemoveAt(0);
CheckLightPropagation(info);
}
return(updateCurrent);
}
