public static void UpdateLighting(int x, int y, int z)
{
//Debug.Log("update lighting");
//float start = Time.realtimeSinceStartup;
Queue <Vector3Int> skyLightQueue = new Queue <Vector3Int>();
Vector3Int p = new Vector3Int();
// init
for (int i = -15; i <= 15; i++)
{
for (int j = -15; j <= 15; j++)
{
p.Set(x + i, y, z + j);
int chunkX = Mathf.FloorToInt(p.x / 16f);
int chunkZ = Mathf.FloorToInt(p.z / 16f);
int xInChunk = p.x - chunkX * 16;
int zInChunk = p.z - chunkZ * 16;
NBTChunk chunk = GetChunk(chunkX, chunkZ);
for (int temp_y = chunk.Sections.Count * 16 - 1; temp_y >= 0; temp_y--)
{
chunk.SetSkyLightByte(xInChunk, temp_y, zInChunk, 0);
}
}
}
HashSet <Vector3Int> skyLightSet = new HashSet <Vector3Int>();
// light from sun (no vertical falloff)
for (int i = -15; i <= 15; i++)
{
for (int j = -15; j <= 15; j++)
{
p.Set(x + i, y, z + j);
int chunkX = Mathf.FloorToInt(p.x / 16f);
int chunkZ = Mathf.FloorToInt(p.z / 16f);
int xInChunk = p.x - chunkX * 16;
int zInChunk = p.z - chunkZ * 16;
NBTChunk chunk = GetChunk(chunkX, chunkZ);
int temp_y = chunk.Sections.Count * 16 - 1;
while (NBTGeneratorManager.LightCanTravel(chunk.GetBlockByte(xInChunk, temp_y, zInChunk)))
{
chunk.SetSkyLightByte(xInChunk, temp_y, zInChunk, 15);
skyLightSet.Add(new Vector3Int(p.x, temp_y, p.z));
if (temp_y == 0)
{
break;
}
else
{
temp_y--;
}
}
}
}
foreach (Vector3Int skyLightPos in skyLightSet)
{
if (skyLightSet.Contains(skyLightPos + Vector3Int.left) &&
skyLightSet.Contains(skyLightPos + Vector3Int.right) &&
skyLightSet.Contains(skyLightPos + Vector3Int.forward) &&
skyLightSet.Contains(skyLightPos + Vector3Int.back))
{
continue;
}
skyLightQueue.Enqueue(new Vector3Int(skyLightPos.x, skyLightPos.y, skyLightPos.z));
}
int count = 0;
int setcount = 0;
// light propagation (use flood fill)
Vector3Int[] arr = new Vector3Int[6];
while (skyLightQueue.Count > 0)
{
count++;
p = skyLightQueue.Dequeue();
byte skyLight = GetSkyLightByte(p.x, p.y, p.z);
arr[0] = p + Vector3Int.left;
arr[1] = p + Vector3Int.right;
arr[2] = p + Vector3Int.up;
arr[3] = p + Vector3Int.down;
arr[4] = p + Vector3Int.forward;
arr[5] = p + Vector3Int.back;
for (int i = 0; i < 6; i++)
{
Vector3Int nextPos = arr[i];
if (NBTGeneratorManager.IsTransparent(GetBlockByte(nextPos.x, nextPos.y, nextPos.z)))
{
byte nextSkyLight = GetSkyLightByte(nextPos.x, nextPos.y, nextPos.z);
if (nextSkyLight < skyLight - 1)
{
setcount++;
//Debug.Log("SetSkyLightByte,nextPos=" + nextPos.x + "," + nextPos.y + "," + nextPos.z);
SetSkyLightByte(nextPos.x, nextPos.y, nextPos.z, (byte)(skyLight - 1));
if (skyLight > 2)
{
skyLightQueue.Enqueue(nextPos);
}
}
}
}
}
//float end = Time.realtimeSinceStartup;
//Debug.Log("time cost =" + (end - start) + ", actual propagation count=" + count + ",setcount=" + setcount);
}