Test-cases: fixed ceter determination of generated test cases

Signed-off-by: Nicola Vigano <vigano@yoda.esrf.fr>

zUtil_Deformation/gtDefSyntheticGrainCreate.m

@@ -49,6 +49,11 @@ detgeo = parameters.detgeo;
 % Update labgeo
 parameters.labgeo = labgeo;
 
+if (~isfield(parameters.fsim, 'oversizeVol') ...
+        || isempty(parameters.fsim.oversizeVol))
+    parameters.fsim.oversizeVol = 1.2;
+end
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %%% Load grain parameters
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -142,7 +147,7 @@ end
 fprintf('\b\b: Done in %g seconds.\nComputing voxel centers..', toc(c))
 c = tic();
 
-fedpars.vox000sam = grain.center - (ngv / 2 + 0.5) .* recgeo(1).voxsize;
+fedpars.vox000sam = grain.center - (ngv / 2) .* recgeo(1).voxsize;
 
 % Elements' positions in the sample volume in mm!
 [gv.cs, gv.d] = compute_voxel_centers(gv, dmvol, fedpars, recgeo(1));
@@ -228,8 +233,8 @@ for n = 1:num_dets
     stack = cat(3, stack{:});
 
     vol_size = gtGeoSam2Sam(grsize, recgeo(1), recgeo(n), 1);
-    vol_size = ceil(vol_size * 1.2);
-    if (is_nearfield)
+    vol_size = ceil(vol_size * parameters.fsim.oversizeVol);
+    if (is_nearfield && size(intvol, 3) == 2) % This handles the 2D case
         vol_size(3) = max(vol_size(3), 8);
     end