public void CalculateMedialAx(ref Voxel[, ,] grid, ref float[, ,] disField, out bool[, ,] result)
{
int l = grid.GetLength(0);
int m = grid.GetLength(1);
int n = grid.GetLength(2);
result = new bool[l, m, n];
int r = (int)Math.Ceiling(FindMax(ref disField));
int[,] lut = new int[MAXWEIGHTING, MAXLUTENTRY];
CompLutMask(l, m, n, ref lut, 0, r * r);
for (int i = 0; i < l; ++i)
{
for (int j = 0; j < m; ++j)
{
for (int k = 0; k < n; ++k)
{
bool set = grid[i, j, k].set;
for (int vIdx = 0; vIdx < MAXWEIGHTING; ++vIdx)
{
LutVec org = mask.vg[vIdx];
for (int h = 0; h < 46; ++h)
{
LutVec v = CalculatePermutation(h, ref org);
if (v.x == 0 && v.y == 0 && v.z == 0 && v.r == 0)
{
continue;
}
if (i + v.x >= 0 && i + v.x < l && j + v.y >= 0 && j + v.y < m && k + v.z >= 0 && k + v.z < n)
{
set &= disField[i + v.x, j + v.y, k + v.z] <= lut[vIdx, (int)disField[i, j, k]];
}
if (!set)
{
break;
}
}
if (!set)
{
break;
}
}
result[i, j, k] = set;
}
}
}
}
private void CompLutCol(ref int[] CT, int lx, int ly, int lz, LutVec vec, int idx, int rMax, ref int[,] Lut)
{
int r1, r2, rb, l2 = ly * lz;
for (int r = 0; r <= rMax; ++r)
{
Lut[idx, r] = 0;
}
for (int z = 0; z < lz - vec.z; ++z)
{
for (int y = 0; y <= z && y < ly; ++y)
{
for (int x = 0; x <= y && x < lx; ++x)
{
r1 = CT[x * l2 + y * lz + z] + 1;
r2 = CT[(x + vec.x) * l2 + (y + vec.y) * lz + z + vec.z] + 1;
if (r1 <= rMax && r2 > Lut[idx, r1])
{
Lut[idx, r1] = r2;
}
}
}
}
rb = 0;
for (int ra = 0; ra < rMax; ++ra)
{
if (Lut[idx, ra] > rb)
{
rb = Lut[idx, ra];
}
else
{
Lut[idx, ra] = rb;
}
}
}
private LutVec CalculatePermutation(int i, ref LutVec vec)
{
LutVec result = vec;
if (i >= 8 && i < 16)
{
result.x = vec.z;
result.y = vec.x;
result.z = vec.y;
}
else if (i >= 16 && i < 24)
{
result.x = vec.y;
result.y = vec.z;
result.z = vec.x;
}
else if (i >= 24 && i < 32)
{
result.x = vec.x;
result.y = vec.z;
result.z = vec.y;
}
else if (i >= 32 && i < 40)
{
result.x = vec.y;
result.y = vec.x;
result.z = vec.z;
}
else if (i >= 40 && i < 46)
{
result.x = vec.z;
result.y = vec.y;
result.z = vec.x;
}
if (i % 8 == 1)
{
result.x = -result.x;
result.y = result.y;
result.z = result.z;
}
else if (i % 8 == 2)
{
result.x = result.x;
result.y = -result.y;
result.z = result.z;
}
else if (i % 8 == 3)
{
result.x = result.x;
result.y = result.y;
result.z = -result.z;
}
else if (i % 8 == 4)
{
result.x = -result.x;
result.y = -result.y;
result.z = result.z;
}
else if (i % 8 == 5)
{
result.x = -result.x;
result.y = result.y;
result.z = -result.z;
}
else if (i % 8 == 6)
{
result.x = result.x;
result.y = -result.y;
result.z = -result.z;
}
else if (i % 8 == 7)
{
result.x = -result.x;
result.y = -result.y;
result.z = -result.z;
}
return(result);
}