public static List <BlockSurface> getChunkSurface(BlockChunk chunk, BlockTypeFunBase blockFun, int normalIndex)
{
int stepX = normalIndex == 0 ? -1 : (normalIndex == 1 ? 1 : 0);
int stepY = normalIndex == 2 ? -1 : (normalIndex == 3 ? 1 : 0);
int stepZ = normalIndex == 4 ? -1 : (normalIndex == 5 ? 1 : 0);
List <BlockSurface> surfacePoints = new List <BlockSurface>();
for (int x = 0; x < Const.ChunkSize; x++)
{
for (int y = 0; y < Const.ChunkSize; y++)
{
for (int z = 0; z < Const.ChunkSize; z++)
{
int nextX = x + stepX;
int nextY = y + stepY;
int nextZ = z + stepZ;
short block = chunk.getBlock(x, y, z);
bool isCurrentVisible = blockFun.isVisible(block);
bool isNextOpacity = blockFun.isOpacity(chunk.getBlockSmart(nextX, nextY, nextZ));
if (isCurrentVisible && !isNextOpacity)
{
BlockSurface surface = new BlockSurface(new Vector3(x, y, z), block, new float[4], new float[4]);
for (int v = 0; v < 4; v++)
{
surface.smallAo[v] = getVertexSmallAo(chunk, blockFun, x, y, z, normalIndex, v);
}
surfacePoints.Add(surface);
}
}
}
}
return(surfacePoints);
}
private static float getVertexSmallAo(BlockChunk blocks, BlockTypeFunBase blockFun, int x, int y, int z, int faceIndex, int vertixIndex)
{
float rlt = 1.0f;
int offset0X = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 0, 0];
int offset0Y = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 0, 1];
int offset0Z = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 0, 2];
bool bBlock0 = blockFun.isOpacity(blocks.getBlockSmart(x + offset0X, y + offset0Y, z + offset0Z));
int offset1X = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 1, 0];
int offset1Y = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 1, 1];
int offset1Z = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 1, 2];
bool bBlock1 = blockFun.isOpacity(blocks.getBlockSmart(x + offset1X, y + offset1Y, z + offset1Z));
int offset2X = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 2, 0];
int offset2Y = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 2, 1];
int offset2Z = Const.VertexAdjacencyOffset[faceIndex, vertixIndex, 2, 2];
bool bBlock2 = blockFun.isOpacity(blocks.getBlockSmart(x + offset2X, y + offset2Y, z + offset2Z));
if (bBlock0 && bBlock2) //如果两个共边对角块都是实体，则共点对角块存不存在已经无所谓，说明是三面内角
{
rlt *= 0.7f;
}
else if ((bBlock0 && bBlock1) || (bBlock1 && bBlock2)) //如果有一个共边对角块和一个共点对角块，则说明是阶梯的内角
{
rlt *= 0.8f;
}
else if (bBlock0 || bBlock1 || bBlock2)
{
rlt *= 0.8f;
}
else
{
rlt *= 1.0f;
}
return(rlt);
}
