Function computeGrid

modules/mpi/tutorials/ospMPIDistribTutorialPartialRepl.cpp:166–180

Compute an X x Y x Z grid to have 'num' grid cells, only gives a nice grid for numbers with even factors since we don't search for factors of the number, we just try dividing by two

// only gives a nice grid for numbers with even factors since
// we don't search for factors of the number, we just try dividing by two
vec3i computeGrid(int num)
{
  vec3i grid(1);
  int axis = 0;
  int divisor = 0;
  while (computeDivisor(num, divisor)) {
    grid[axis] *= divisor;
    num /= divisor;
    axis = (axis + 1) % 3;
  }
  if (num != 1) {
    grid[axis] *= num;
  }
  return grid;
}

VolumeBrick makeLocalVolume(const int mpiRank, const int mpiWorldSize)
{