// Scatters the initial light throughout the map.
public static void Scatter(int worldX, int worldZ, Queue <Vector3i> sunNodes, Queue <Vector3i> lightNodes)
{
for (int x = worldX; x < worldX + Chunk.Size; x++)
{
for (int z = worldZ; z < worldZ + Chunk.Size; z++)
{
int ray = MapLight.GetRay(x, z);
int maxY = ComputeMaxY(x, z, ray);
for (int y = ray; y <= maxY; y++)
{
if (y >= Map.Height)
{
continue;
}
sunNodes.Enqueue(new Vector3i(x, y, z));
byte light = Map.GetBlock(x, y, z).LightEmitted();
if (light > LightUtils.MinLight)
{
MapLight.SetLight(x, y, z, light);
lightNodes.Enqueue(new Vector3i(x, y, z));
}
}
}
}
ScatterNodes(sunNodes, true);
BlockLightEngine.ScatterNodes(lightNodes, true);
}
private static void RemoveNodes(Queue <Vector3i> nodes)
{
Queue <Vector3i> newLights = new Queue <Vector3i>();
while (nodes.Count > 0)
{
Vector3i pos = nodes.Dequeue();
if (pos.y < 0 || pos.y >= Map.Height)
{
continue;
}
int light = MapLight.GetLight(pos.x, pos.y, pos.z) - 1;
MapLight.SetLight(pos.x, pos.y, pos.z, LightUtils.MinLight);
if (light <= LightUtils.MinLight)
{
continue;
}
for (int i = 0; i < 6; i++)
{
Vector3i nextPos = pos + Vector3i.directions[i];
if (Map.InBounds(nextPos.x, nextPos.z))
{
Block block = Map.GetBlock(nextPos.x, nextPos.y, nextPos.z);
if (block.IsTransparent())
{
if (MapLight.GetLight(nextPos.x, nextPos.y, nextPos.z) <= light)
{
nodes.Enqueue(nextPos);
}
else
{
newLights.Enqueue(nextPos);
}
}
if (block.LightEmitted() > LightUtils.MinLight)
{
newLights.Enqueue(nextPos);
}
Map.FlagChunkForUpdate(nextPos.x, nextPos.y, nextPos.z);
}
}
}
ScatterNodes(newLights, false);
}
public static bool SetMax(byte light, int x, int y, int z)
{
byte oldLight = MapLight.GetLight(x, y, z);
if (oldLight < light)
{
MapLight.SetLight(x, y, z, light);
return(true);
}
return(false);
}
public static void Recompute(Vector3i pos, Queue <Vector3i> nodes)
{
byte oldLight = MapLight.GetLight(pos.x, pos.y, pos.z);
byte light = Map.GetBlock(pos.x, pos.y, pos.z).LightEmitted();
if (oldLight > light)
{
Remove(pos, nodes);
}
if (light > LightUtils.MinLight)
{
MapLight.SetLight(pos.x, pos.y, pos.z, light);
Scatter(pos, nodes);
}
else
{
Update(pos, nodes);
}
}
private static void Remove(Vector3i pos, Queue <Vector3i> nodes)
{
MapLight.SetLight(pos.x, pos.y, pos.z, LightUtils.MaxLight);
nodes.Enqueue(pos);
RemoveNodes(nodes);
}
