private void PolygonizeCubes()
{
this.NumTriangles = 0;
MarchingCubesVertex[] vertlist = new MarchingCubesVertex[12];
for (int k = 0; k < this.Z - 1; k++)
{
for (int j = 0; j < this.Y - 1; j++)
{
for (int i = 0; i < this.X - 1; i++)
{
this.PolygonizeCube(i, j, k, vertlist);
}
}
}
}
private void PolygonizeCube(int i, int j, int k, MarchingCubesVertex[] vertlist)
{
int index = 0;
if (this.isInside[(k * this.Y + j) * this.X + i] < 0f)
{
index = 1; //|= 1;
}
//x+1
if (this.isInside[(k * this.Y + j) * this.X + i + 1] < 0f)
{
index |= 2;
}
//z+1, x+1
if (this.isInside[((k + 1) * this.Y + j) * this.X + i + 1] < 0f)
{
index |= 4;
}
//z+1
if (this.isInside[((k + 1) * this.Y + j) * this.X + i] < 0f)
{
index |= 8;
}
//y+1
if (this.isInside[(k * this.Y + j + 1) * this.X + i] < 0f)
{
index |= 16;
}
//y+1, x+1
if (this.isInside[(k * this.Y + j + 1) * this.X + i + 1] < 0f)
{
index |= 32;
}
//z+1, y+1, x+1
if (this.isInside[((k + 1) * this.Y + j + 1) * this.X + i + 1] < 0f)
{
index |= 64;
}
//z+1, y+1
if (this.isInside[((k + 1) * this.Y + j + 1) * this.X + i] < 0f)
{
index |= 128;
}
//index fungerar som ett gäng flaggor, 255 = 11111111 = alla if-satser kördes
//om index tex = 21 = 10101 betyder det att if-sats nr 1, 3 och 5 kördes
if (Data.edgeTable[index] != 0)
{
if ((Data.edgeTable[index] & 1) != 0)
{
//x-1?
vertlist[0] = this.xv[(k * this.Y + j) * (this.X - 1) + i];
}
if ((Data.edgeTable[index] & 2) != 0)
{
vertlist[1] = this.zv[((k * this.Y + j) * this.X) + i + 1];
}
if ((Data.edgeTable[index] & 4) != 0)
{
vertlist[2] = this.xv[((((k + 1) * this.Y) + j) * (this.X - 1)) + i];
}
if ((Data.edgeTable[index] & 8) != 0)
{
vertlist[3] = this.zv[(((k * this.Y) + j) * this.X) + i];
}
if ((Data.edgeTable[index] & 16) != 0)
{
vertlist[4] = this.xv[(((k * this.Y) + (j + 1)) * (this.X - 1)) + i];
}
if ((Data.edgeTable[index] & 32) != 0)
{
vertlist[5] = this.zv[(((k * this.Y) + (j + 1)) * this.X) + (i + 1)];
}
if ((Data.edgeTable[index] & 64) != 0)
{
vertlist[6] = this.xv[((((k + 1) * this.Y) + (j + 1)) * (this.X - 1)) + i];
}
if ((Data.edgeTable[index] & 128) != 0)
{
vertlist[7] = this.zv[(((k * this.Y) + (j + 1)) * this.X) + i];
}
if ((Data.edgeTable[index] & 256) != 0)
{
vertlist[8] = this.yv[(((k * (this.Y - 1)) + j) * this.X) + i];
}
if ((Data.edgeTable[index] & 512) != 0)
{
vertlist[9] = this.yv[(((k * (this.Y - 1)) + j) * this.X) + (i + 1)];
}
if ((Data.edgeTable[index] & 1024) != 0)
{
vertlist[10] = this.yv[((((k + 1) * (this.Y - 1)) + j) * this.X) + (i + 1)];
}
if ((Data.edgeTable[index] & 2048) != 0)
{
vertlist[11] = this.yv[((((k + 1) * (this.Y - 1)) + j) * this.X) + i];
}
for (int m = 0; Data.triTable[index, m] != -1; m += 3)
{
this.Triangles[this.NumTriangles].v0 = vertlist[Data.triTable[index, m]];
this.Triangles[this.NumTriangles].v1 = vertlist[Data.triTable[index, m + 1]];
this.Triangles[this.NumTriangles].v2 = vertlist[Data.triTable[index, m + 2]];
this.NumTriangles++;
}
}
}
