From 7e3d910014154f123516600ba23b63eff2b6c0a7 Mon Sep 17 00:00:00 2001
From: schnetter <schnetter@1bf05452-ddb3-4880-bfa1-00436340132b>
Date: Fri, 9 May 2003 13:31:16 +0000
Subject: Apply boundary conditions only where bbox!=0.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/Periodic/trunk@5 1bf05452-ddb3-4880-bfa1-00436340132b
---
 param.ccl      |  4 ++++
 src/periodic.c | 39 +++++++++++++++++++++++++++------------
 2 files changed, 31 insertions(+), 12 deletions(-)

diff --git a/param.ccl b/param.ccl
index cf32df5..43429e7 100644
--- a/param.ccl
+++ b/param.ccl
@@ -1,6 +1,10 @@
 # Parameter definitions for thorn Periodic
 # $Header$
 
+BOOLEAN verbose "Produce screen output while applying boundary conditions"
+{
+} "no"
+
 BOOLEAN periodic "Periodic boundary conditions"
 {
 } "no"
diff --git a/src/periodic.c b/src/periodic.c
index 12b5e73..d63e065 100644
--- a/src/periodic.c
+++ b/src/periodic.c
@@ -22,6 +22,7 @@ BndPeriodicVI (cGH const * restrict const cctkGH,
   
   cGroup group;
   cGroupDynamicData data;
+  char * restrict fullname;
   void * restrict varptr;
   struct xferinfo * restrict xferinfo;
   int do_periodic[3];
@@ -35,6 +36,15 @@ BndPeriodicVI (cGH const * restrict const cctkGH,
   assert (stencil);
   assert (vi>=0 && vi<CCTK_NumVars());
   
+  if (verbose) {
+    fullname = CCTK_FullName(vi);
+    assert (fullname);
+    CCTK_VInfo (CCTK_THORNSTRING,
+                "Applying periodicity boundary conditions to %s",
+                fullname);
+    free (fullname);
+  }
+  
   /* Get and check group info */
   gi = CCTK_GroupIndexFromVarI (vi);
   assert (gi>=0 && gi<CCTK_NumGroups());
@@ -76,7 +86,7 @@ BndPeriodicVI (cGH const * restrict const cctkGH,
           xferinfo[d].src.nghostzones = data.nghostzones[d];
           xferinfo[d].src.off         = 0;
           xferinfo[d].src.str         = 1;
-          xferinfo[d].src.len         = data.lsh        [d];
+          xferinfo[d].src.len         = data.gsh        [d];
           
           xferinfo[d].dst.gsh         = data.gsh        [d];
           xferinfo[d].dst.lbnd        = data.lbnd       [d];
@@ -86,23 +96,28 @@ BndPeriodicVI (cGH const * restrict const cctkGH,
           xferinfo[d].dst.nghostzones = data.nghostzones[d];
           xferinfo[d].dst.off         = 0;
           xferinfo[d].dst.str         = 1;
-          xferinfo[d].dst.len         = data.lsh        [d];
+          xferinfo[d].dst.len         = data.gsh        [d];
           
           xferinfo[d].xpose = d;
           xferinfo[d].flip  = 0;
         }
         
-        if (f==0) {
-          /* Fill in lower face */
-          xferinfo[dir].src.off = data.gsh[dir] - 2 * stencil[dir];
-          xferinfo[dir].src.len = stencil[dir];
-          xferinfo[dir].dst.len = stencil[dir];
+        if (cctkGH->cctk_bbox[2*dir+f]) {
+          if (f==0) {
+            /* Fill in lower face */
+            xferinfo[dir].src.off = data.gsh[dir] - 2 * stencil[dir];
+            xferinfo[dir].src.len = stencil[dir];
+            xferinfo[dir].dst.len = stencil[dir];
+          } else {
+            /* Fill in upper face */
+            xferinfo[dir].src.off = stencil[dir];
+            xferinfo[dir].src.len = stencil[dir];
+            xferinfo[dir].dst.off = data.gsh[dir] - stencil[dir];
+            xferinfo[dir].dst.len = stencil[dir];
+          }
         } else {
-          /* Fill in upper face */
-          xferinfo[dir].src.off = stencil[dir];
-          xferinfo[dir].src.len = stencil[dir];
-          xferinfo[dir].dst.off = data.gsh[dir] - stencil[dir];
-          xferinfo[dir].dst.len = stencil[dir];
+          xferinfo[dir].src.len = 0;
+          xferinfo[dir].dst.len = 0;
         }
         
         ierr = Slab_Transfer (cctkGH, group.dim, xferinfo, -1,
-- 
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