mm->vox integers per FSL fslmeants INPUT

gistfile1.txt

FSL fslmeants INPUT
------------------------------------------------
Appears to round coordinate floats to integers via MISCMATHS::round 
(adding or subtracting .5 then truncating decimal via cast):

If user inputs mm coordinates as fslmeants argument (-c --usemm), fslmeants
rounds to integer voxel coordinates using call to MISCMATHS::round().

From fslmeants.cc:

	...
	238     if (usemm.value()) {
	239       // convert from mm to newimage voxels
	240       v = (vin[0].newimagevox2mm_mat()).i() * v;
	241     } else {
	...
	244     }
	245     x = v(1);  y = v(2);  z = v(3);
	246     mask(MISCMATHS::round(x),MISCMATHS::round(y),MISCMATHS::round(z)) = 1.0;
	...

...which calls round() from miscmaths.cc :

	 ...
	 455   // General mathematical functions
	 456 
	 457   int round(int x) { return x; }
	 458 
	 459   int round(float x)
	 460     {
	 461       if (x>0.0) return ((int) (x+0.5));
	 462       else       return ((int) (x-0.5));
	 463     }
	 464 
	 465    int round(double x)
	 466    {
	 467      if (x>0.0) return ((int) (x+0.5));
	 468      else       return ((int) (x-0.5));
	 469    }
	 ...