}//get copnfig
private void ExtractTriangles(ref Cube cube, byte value, MeshBuilder_FloatVertex builder)
{
if (MCTable.TriTable[value, 0] != -1)
{
int index = 0;
while (MCTable.TriTable[value, index] != -1)
{
int e0index = MCTable.TriTable[value, index];
int e1index = MCTable.TriTable[value, index + 1];
int e2index = MCTable.TriTable[value, index + 2];
Int16Triple e0p0 = cube.cubeImageIndices[Cube.EdgeIndexToEdgeVertexIndex[e0index, 0]];
Int16Triple e0p1 = cube.cubeImageIndices[Cube.EdgeIndexToEdgeVertexIndex[e0index, 1]];
Int16Triple e1p0 = cube.cubeImageIndices[Cube.EdgeIndexToEdgeVertexIndex[e1index, 0]];
Int16Triple e1p1 = cube.cubeImageIndices[Cube.EdgeIndexToEdgeVertexIndex[e1index, 1]];
Int16Triple e2p0 = cube.cubeImageIndices[Cube.EdgeIndexToEdgeVertexIndex[e2index, 0]];
Int16Triple e2p1 = cube.cubeImageIndices[Cube.EdgeIndexToEdgeVertexIndex[e2index, 1]];
Point3d e0pm = GetIntersetedPoint(e0p0, e0p1);
Point3d e1pm = GetIntersetedPoint(e1p0, e1p1);
Point3d e2pm = GetIntersetedPoint(e2p0, e2p1);
builder.AddTriangle(e0pm, e1pm, e2pm);
index += 3;
}
}
}//extract triangles and put them into mesh builder
}//judge if a voxel is inside the surface
public Mesh GeneratorSurface()
{
MeshBuilder_FloatVertex builder = new MeshBuilder_FloatVertex(bmp.width + 2, bmp.height + 2, bmp.depth + 2);// this class can build mesh from independent triangles
for (int k = 0; k < bmp.depth - 1; k++)
{
for (int j = 0; j < bmp.height - 1; j++)
{
for (int i = 0; i < bmp.width - 1; i++)
{
Cube cell = new Cube(i, j, k); //builde Cube for Cell at i j k
byte config = GetConfig(ref cell); // get byte config for the cell
ExtractTriangles(ref cell, config, builder); // extract triangles from cell and push into
}
}
}
return(builder.GetMesh());
}
