bool ReadChunkData(int x1, int y1, int z1, ref bool outAllAir) // only assign this variable once
{
bool allAir = true, allSolid = true;
fixed(BlockID *mapPtr = map.blocks)
{
for (int yy = -1; yy < 17; yy++)
{
int y = yy + y1;
if (y < 0)
{
continue;
}
if (y >= height)
{
break;
}
for (int zz = -1; zz < 17; zz++)
{
int z = zz + z1;
if (z < 0)
{
continue;
}
if (z >= length)
{
break;
}
int index = (y * length + z) * width + (x1 - 1 - 1);
int chunkIndex = (yy + 1) * extChunkSize2 + (zz + 1) * extChunkSize + (-1 + 1) - 1;
for (int xx = -1; xx < 17; xx++)
{
int x = xx + x1;
index++;
chunkIndex++;
if (x < 0)
{
continue;
}
if (x >= width)
{
break;
}
BlockID rawBlock = mapPtr[index];
allAir = allAir && info.Draw[rawBlock] == DrawType.Gas;
allSolid = allSolid && info.FullOpaque[rawBlock];
chunk[chunkIndex] = rawBlock;
}
}
}
outAllAir = allAir;
if (x1 == 0 || y1 == 0 || z1 == 0 || x1 + chunkSize >= width ||
y1 + chunkSize >= height || z1 + chunkSize >= length)
{
allSolid = false;
}
if (allAir || allSolid)
{
return(true);
}
light.LightHint(x1 - 1, z1 - 1, mapPtr);
return(false);
}
}
bool BuildChunk(int x1, int y1, int z1, ref bool allAir)
{
light = game.Lighting;
PreStretchTiles(x1, y1, z1);
BlockID *chunkPtr = stackalloc BlockID[extChunkSize3]; chunk = chunkPtr;
byte * countsPtr = stackalloc byte[chunkSize3 * Side.Sides]; counts = countsPtr;
int * bitsPtr = stackalloc int[extChunkSize3]; bitFlags = bitsPtr;
MemUtils.memset((IntPtr)chunkPtr, 0, 0, extChunkSize3 * sizeof(BlockID));
bool allSolid = false;
fixed(BlockRaw *mapPtr = map.blocks)
{
#if !ONLY_8BIT
if (BlockInfo.MaxUsed >= 256)
{
ReadChunkData_16Bit(x1, y1, z1, mapPtr, ref allAir, ref allSolid);
}
else
{
ReadChunkData_8Bit(x1, y1, z1, mapPtr, ref allAir, ref allSolid);
}
#else
ReadChunkData_8Bit(x1, y1, z1, mapPtr, ref allAir, ref allSolid);
#endif
if (x1 == 0 || y1 == 0 || z1 == 0 || x1 + chunkSize >= width ||
y1 + chunkSize >= height || z1 + chunkSize >= length)
{
allSolid = false;
}
if (allAir || allSolid)
{
return(false);
}
light.LightHint(x1 - 1, z1 - 1, mapPtr);
}
MemUtils.memset((IntPtr)countsPtr, 1, 0, chunkSize3 * Side.Sides);
int xMax = Math.Min(width, x1 + chunkSize);
int yMax = Math.Min(height, y1 + chunkSize);
int zMax = Math.Min(length, z1 + chunkSize);
chunkEndX = xMax; chunkEndZ = zMax;
Stretch(x1, y1, z1);
PostStretchTiles(x1, y1, z1);
for (int y = y1, yy = 0; y < yMax; y++, yy++)
{
for (int z = z1, zz = 0; z < zMax; z++, zz++)
{
int chunkIndex = (yy + 1) * extChunkSize2 + (zz + 1) * extChunkSize + (0 + 1);
for (int x = x1, xx = 0; x < xMax; x++, xx++)
{
curBlock = chunk[chunkIndex];
if (BlockInfo.Draw[curBlock] != DrawType.Gas)
{
int index = ((yy << 8) | (zz << 4) | xx) * Side.Sides;
X = x; Y = y; Z = z;
cIndex = chunkIndex;
RenderTile(index);
}
chunkIndex++;
}
}
}
return(true);
}
