Bug fix from Erik Schnetter

git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/CartGrid3D/trunk@120 c78560ca-4b45-4335-b268-5f3340f3cb52

1 files changed, 8 insertions, 4 deletions

diff --git a/src/CartGrid3D.c b/src/CartGrid3D.c
index e637ee2..178e13a 100644
--- a/src/CartGrid3D.c
+++ b/src/CartGrid3D.c
@@ -223,7 +223,9 @@ void CartGrid3D(CCTK_ARGUMENTS)
     } 
     else 
     {
-      x_origin = (- cctk_gsh[0]/2 + 0.5) * this_dx;
+      x_origin = - 0.5 * (cctk_gsh[0]-1 - cntstag[0] * (cctk_gsh[0]-1)%2)
+	* this_dx;
+      x_origin=0;
     }
     
     if (domainsym[2]) 
@@ -232,7 +234,9 @@ void CartGrid3D(CCTK_ARGUMENTS)
     } 
     else 
     {
-      y_origin = (- cctk_gsh[1]/2 + 0.5) * this_dy;
+      y_origin = - 0.5 * (cctk_gsh[1]-1 - cntstag[1] * (cctk_gsh[1]-1)%2)
+	* this_dy;
+      y_origin=0;
     }
     
     if (domainsym[4]) 
@@ -241,9 +245,9 @@ void CartGrid3D(CCTK_ARGUMENTS)
     } 
     else 
     {
-      z_origin = (- cctk_gsh[2]/2 + 0.5) * this_dz;
+      z_origin = - 0.5 * (cctk_gsh[2]-1 - cntstag[2] * (cctk_gsh[2]-1)%2)
+       * this_dz;
     }
-    
   }
 
   /* Set spatial coordinates */