public void Run(World world)
{
if (Area.Size > 16 * 16 * 128) {
Console.WriteLine("[LightingEngine] Tried to run a too big update");
return;
}
for (int x = Area.X1; x <= Area.X2; x++) {
for (int z = Area.Z1; z <= Area.Z2; z++) {
if (!world.IsLoaded(x, z))
continue;
for (int y = Area.Y1; y <= Area.Y2; y++) {
int oldLight = world.GetLight(Type, x, y, z);
int newLight = 0;
int blockType = world.GetBlockType(x, y, z);
int lightBlocked = Math.Max(1, Block.LightAbsorbs[blockType]);
int lightEmitted = 0;
if (Type == LightType.Sky) {
// Blocks directly hit by sky light scatter light
if (world.RecievesSkyLight(x, y, z))
lightEmitted = 15;
} else if (Type == LightType.Block) {
lightEmitted = Block.LightEmits[blockType];
}
// All light gets absorbed, no need to check neighbors
if (lightBlocked >= 15 && lightEmitted == 0)
newLight = 0;
else {
// Find the highest light from the neighbors
newLight = Math.Max(0, GetHighestNeighbor(world, x, y, z) - lightBlocked);
// Emitted light always takes precedence
if (lightEmitted > newLight)
newLight = lightEmitted;
}
// Light changed, scatter it to neighbors
if (oldLight != newLight) {
world.SetLight(Type, x, y, z, newLight);
int neighborLight = Math.Max(0, newLight - 1);
// Definitely update blocks we already passed in the loop
engine.TryUpdateTile(Type, x - 1, y, z, neighborLight);
engine.TryUpdateTile(Type, x, y - 1, z, neighborLight);
engine.TryUpdateTile(Type, x, y, z - 1, neighborLight);
// Only update following blocks if we aren't going to update them in this loop
if (x + 1 >= Area.X2)
engine.TryUpdateTile(Type, x + 1, y, z, neighborLight);
if (y + 1 >= Area.Y2)
engine.TryUpdateTile(Type, x, y + 1, z, neighborLight);
if (z + 1 >= Area.Z2)
engine.TryUpdateTile(Type, x, y, z + 1, neighborLight);
}
}
}
}
}
