//
// Rest of marching cubes algorithm (on CPU)
//
//更新三角形面片的顶点位置
private void updateVertices2(GPUEdgeVertices vert)
{
int cubeIndex = vert.index;
for (int k = 0; triTable[cubeIndex][k] != -1; k += 3)
{
this.vertices.Add(this.findVertex(vert, this.triTable[cubeIndex][k]));
this.vertices.Add(this.findVertex(vert, this.triTable[cubeIndex][k + 2]));
this.vertices.Add(this.findVertex(vert, this.triTable[cubeIndex][k + 1]));
}
}
private Vector3 findVertex(GPUEdgeVertices vert, int i)
{
if (i == 0)
{
return(vert.edge0);
}
else if (i == 1)
{
return(vert.edge1);
}
else if (i == 2)
{
return(vert.edge2);
}
else if (i == 3)
{
return(vert.edge3);
}
else if (i == 4)
{
return(vert.edge4);
}
else if (i == 5)
{
return(vert.edge5);
}
else if (i == 6)
{
return(vert.edge6);
}
else if (i == 7)
{
return(vert.edge7);
}
else if (i == 8)
{
return(vert.edge8);
}
else if (i == 9)
{
return(vert.edge9);
}
else if (i == 10)
{
return(vert.edge10);
}
else
{
return(vert.edge11);
}
}
//
// GPU metaball falloff function summator & part of marching cubes algorithm
//
private GPUEdgeVertices[] runComputeShader(GPUBall[] gpuBalls)
{
// pass data to the compute shader
this.metaballsBuffer.SetData(gpuBalls);
this.shader.SetInt("numMetaballs", gpuBalls.Length);
this.shader.SetInt("width", this.width);
this.shader.SetInt("height", this.height);
this.shader.SetFloat("threshold", this.container.threshold);
// Run, Forrest, run!
this.shader.Dispatch(this.shaderKernel, this.width / 8, this.height / 8, this.depth / 8);
// parse returned vertex data and return it
GPUEdgeVertices[] output = new GPUEdgeVertices[this.verticesBuffer.count];
this.verticesBuffer.GetData(output);
return(output);
}