Correction of grain center in the case of real data

Signed-off-by: Lorenzo Valzania <valzania@rnice7-0308.esrf.fr>

7_fed2/gtFedTestLoadData_v2.m

@@ -91,10 +91,14 @@ gv.ind = gv.ind';
 % Elements' positions in the sample volume in mm!
 gv.cs = fedpars.vox000sam(ones(nv, 1), :)' + gv.ind .* recgeo(1).voxsize(ones(nv, 1), :)';
 
-% Grain center position in sample in mm!
-gc = fedpars.vox000sam + (grsize/2 + [0.5, 0.5, 0.5]) .* recgeo(1).voxsize;
-fedpars.graincentsam = gc;
-grain.center = gc;
+if (~(isfield(fedpars, 'is_real_data') && fedpars.is_real_data))
+    % Grain center position in sample in mm!
+    gc = fedpars.vox000sam + (grsize/2 + [0.5, 0.5, 0.5]) .* recgeo(1).voxsize
+    grain.center = gc;
+    fedpars.graincentsam = gc;
+else
+    gc = grain.center;
+end
 
 % Element diffracting power
 if (~exist('intvol', 'var') || isempty(intvol))