/*unsafe bool CalculateHeightmapCoverage(int x1, int z1, int xCount, int zCount, int elemsLeft, int* skip, BlockRaw* mapPtr) {
* int prevRunCount = 0;
* for (int y = height - 1; y >= 0; y--) {
* if (elemsLeft <= 0) return true;
* int mapIndex = x1 + width * (z1 + y * length);
* int heightmapIndex = x1 + z1 * width;
*
* for (int z = 0; z < zCount; z++) {
* int baseIndex = mapIndex;
* int index = z * xCount;
* for (int x = 0; x < xCount;) {
* int curRunCount = skip[index];
* x += curRunCount; mapIndex += curRunCount; index += curRunCount;
*
* if (x < xCount && BlockInfo.BlocksLight[mapPtr[mapIndex]]) {
* int lightOffset = (BlockInfo.LightOffset[mapPtr[mapIndex]] >> Side.Top) & 1;
* heightmap[heightmapIndex + x] = (short)(y - lightOffset);
* elemsLeft--;
* skip[index] = 0;
* int offset = prevRunCount + curRunCount;
* int newRunCount = skip[index - offset] + 1;
*
* // consider case 1 0 1 0, where we are at 0
* // we need to make this 3 0 0 0 and advance by 1
* int oldRunCount = (x - offset + newRunCount) < xCount ? skip[index - offset + newRunCount] : 0;
* if (oldRunCount != 0) {
* skip[index - offset + newRunCount] = 0;
* newRunCount += oldRunCount;
* }
* skip[index - offset] = newRunCount;
* x += oldRunCount; index += oldRunCount; mapIndex += oldRunCount;
* prevRunCount = newRunCount;
* } else {
* prevRunCount = 0;
* }
* x++; mapIndex++; index++;
* }
* prevRunCount = 0;
* heightmapIndex += width;
* mapIndex = baseIndex + width; // advance one Z
* }
* }
* return false;
* }*/
unsafe bool CalculateHeightmapCoverage_2(int x1, int z1, int xCount, int zCount, int elemsLeft, int *skip)
{
int prevRunCount = 0;
for (int y = height - 1; y >= 0; y--)
{
if (elemsLeft <= 0)
{
return(true);
}
int mapIndex = x1 + width * (z1 + y * length);
int heightmapIndex = x1 + z1 * width;
for (int z = 0; z < zCount; z++)
{
int baseIndex = mapIndex;
int index = z * xCount;
for (int x = 0; x < xCount;)
{
int curRunCount = skip[index];
x += curRunCount; mapIndex += curRunCount; index += curRunCount;
int x2 = mapIndex % width;
int y2 = mapIndex / oneY; // posIndex / (width * length)
int z2 = (mapIndex / width) % length;
if (x < xCount && BlockInfo.BlocksLight[ChunkHandler.GetBlock(x2, y2, z2)])
{
int lightOffset = (BlockInfo.LightOffset[ChunkHandler.GetBlock(x2, y2, z2)] >> Side.Top) & 1;
heightmap[heightmapIndex + x] = (short)(y - lightOffset);
elemsLeft--;
skip[index] = 0;
int offset = prevRunCount + curRunCount;
int newRunCount = skip[index - offset] + 1;
// consider case 1 0 1 0, where we are at 0
// we need to make this 3 0 0 0 and advance by 1
int oldRunCount = (x - offset + newRunCount) < xCount ? skip[index - offset + newRunCount] : 0;
if (oldRunCount != 0)
{
skip[index - offset + newRunCount] = 0;
newRunCount += oldRunCount;
}
skip[index - offset] = newRunCount;
x += oldRunCount; index += oldRunCount; mapIndex += oldRunCount;
prevRunCount = newRunCount;
}
else
{
prevRunCount = 0;
}
x++; mapIndex++; index++;
}
prevRunCount = 0;
heightmapIndex += width;
mapIndex = baseIndex + width; // advance one Z
}
}
return(false);
}
int CalcHeightAt(int x, int maxY, int z, int index)
{
int mapIndex = (maxY * length + z) * width + x;
//BlockRaw[] blocks = game.World.blocks1;
for (int y = maxY; y >= 0; y--)
{
//BlockID block = blocks[mapIndex];
BlockID block = ChunkHandler.GetBlock(x, y, z);
if (BlockInfo.BlocksLight[block])
{
int offset = (BlockInfo.LightOffset[block] >> Side.Top) & 1;
heightmap[index] = (short)(y - offset);
return(y - offset);
}
mapIndex -= oneY;
}
heightmap[index] = -10;
return(-10);
}
void ResetNeighourChunk(int cx, int cy, int cz, BlockID block,
int y, int index, int nY)
{
World world = game.World;
int minY = cy << 4;
int x = index % width;
int z = (index / width) % length;
// Update if any blocks in the chunk are affected by light change
for (; y >= minY; y--)
{
BlockID other = ChunkHandler.GetBlock(x, y, z);
bool affected = y == nY?Needs(block, other) : BlockInfo.Draw[other] != DrawType.Gas;
if (affected)
{
renderer.RefreshChunk(cx, cy, cz); return;
}
index -= world.Width * world.Length;
}
}
