From 9b8fb63abc14ea5260b8fe2ce73a32c16a60e3ca Mon Sep 17 00:00:00 2001
From: rhaas <rhaas@c3c03602-0f4f-0410-b3fa-d2c81c8a7dc5>
Date: Mon, 17 Jun 2013 16:34:47 +0000
Subject: handle vector groups of vectors and higher order tensors

this patch adds support for groups of the form

CCTK_REAL vvel[3] "group of vectors"
{
  vvelx, vvely, vvelz
}

it changes how the vector/tensor component is constructed from the variable
index. It assumes that Cactus order variables as
vvelx[0], vvelx[1], vvelx[2], vvely[0], ...


git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/RotatingSymmetry90/trunk@89 c3c03602-0f4f-0410-b3fa-d2c81c8a7dc5
---
 src/interpolate.c        |  74 +++++++++++++++++++---------------
 src/rotatingsymmetry90.c | 102 ++++++++++++++++++++++++++++++-----------------
 2 files changed, 107 insertions(+), 69 deletions(-)

diff --git a/src/interpolate.c b/src/interpolate.c
index 4594844..4087119 100644
--- a/src/interpolate.c
+++ b/src/interpolate.c
@@ -292,15 +292,19 @@ Rot90_CheckTensorTypes (CCTK_ARGUMENTS)
   for (gi=0; gi<CCTK_NumGroups(); ++gi) {
     
     char tensortypealias[100];
-    int numvars, firstvar;
+    int numvars, firstvar, vectorlength;
     int table;
     int ierr;
+    cGroup group;
     
     numvars = CCTK_NumVarsInGroupI(gi);
     if (numvars == 0) continue;
     assert (numvars>0);
     firstvar = CCTK_FirstVarIndexI(gi);
     assert (firstvar>=0);
+    ierr = CCTK_GroupData (gi, &group);
+    assert (!ierr);
+    vectorlength = group.vectorlength;
     table = CCTK_GroupTagsTableI(gi);
     assert (table>=0);
     
@@ -348,30 +352,31 @@ Rot90_CheckTensorTypes (CCTK_ARGUMENTS)
     } else if (CCTK_EQUALS (tensortypealias, "u")
                || CCTK_EQUALS (tensortypealias, "d"))
     {
-      /* vector */
-      assert (numvars == DIM);
+      /* vector, special case */
+      assert ((numvars == DIM*vectorlength) ||
+              (numvars == DIM && vectorlength == DIM));
     } else if (CCTK_EQUALS (tensortypealias, "4u")
                || CCTK_EQUALS (tensortypealias, "4d"))
     {
       /* 4-vector */
-      assert (numvars == DIM+1);
+      assert (numvars == (DIM+1)*vectorlength);
     } else if (CCTK_EQUALS (tensortypealias, "uu")
                || CCTK_EQUALS (tensortypealias, "ud")
                || CCTK_EQUALS (tensortypealias, "du")
                || CCTK_EQUALS (tensortypealias, "dd")) {
       /* tensor */
-      assert (numvars == DIM*DIM);
+      assert (numvars == DIM*DIM*vectorlength);
     } else if (CCTK_EQUALS (tensortypealias, "uu_sym")
                || CCTK_EQUALS (tensortypealias, "dd_sym")) {
       /* symmetric tensor */
-      assert (numvars == DIM*(DIM+1)/2);
+      assert (numvars == DIM*(DIM+1)/2*vectorlength);
     } else if (CCTK_EQUALS (tensortypealias, "ddd_sym")) {
       /* 3rd rank tensor, symmetric in last 2 indices */
-      assert (numvars == DIM*DIM*(DIM+1)/2);
+      assert (numvars == DIM*DIM*(DIM+1)/2*vectorlength);
     } else if (CCTK_EQUALS (tensortypealias, "4uu_sym")
                || CCTK_EQUALS (tensortypealias, "4dd_sym")) {
       /* symmetric 4-tensor */
-      assert (numvars == (DIM+1)*(DIM+2)/2);
+      assert (numvars == (DIM+1)*(DIM+2)/2*vectorlength);
     } else {
       char * groupname = CCTK_GroupName(gi);
       assert (groupname);
@@ -617,7 +622,8 @@ Rot90_SymmetryInterpolate (CCTK_POINTER_TO_CONST const cctkGH,
   if (output_array_indices[m]!=-1) {
     
     int vi, gi;
-    int numvars, firstvar;
+    int numvars, firstvar, vectorlength;
+    cGroup group;
     int table;
     
     char tensortypealias[100];
@@ -630,7 +636,7 @@ Rot90_SymmetryInterpolate (CCTK_POINTER_TO_CONST const cctkGH,
     int num_time_derivs;
     int num_derivs;
     int time_level;
-    
+
     /* Get some variable information */
     vi = output_array_indices[m];
     assert (vi>=0 && vi<CCTK_NumVars());
@@ -642,6 +648,9 @@ Rot90_SymmetryInterpolate (CCTK_POINTER_TO_CONST const cctkGH,
     assert (firstvar>=0);
     table = CCTK_GroupTagsTableI(gi);
     assert (table>=0);
+    ierr = CCTK_GroupData (gi, &group);
+    assert (!ierr);
+    vectorlength = group.vectorlength;
     
     /* Get the tensor type alias */
     ierr = Util_TableGetString
@@ -697,72 +706,73 @@ Rot90_SymmetryInterpolate (CCTK_POINTER_TO_CONST const cctkGH,
                || CCTK_EQUALS (tensortypealias, "d"))
     {
       /* vector */
-      assert (numvars == DIM);
+      assert ((numvars == DIM*vectorlength) ||
+              (numvars == DIM && vectorlength == DIM));
       tensortype = &vector;
       basevar = firstvar;
-      var = vi - basevar;
+      var = (vi - basevar) / vectorlength;
     } else if (CCTK_EQUALS (tensortypealias, "4u")
                || CCTK_EQUALS (tensortypealias, "4d"))
     {
       /* 4-vector */
-      assert (numvars == DIM+1);
-      if (vi == firstvar) {
+      assert (numvars == (DIM+1)*vectorlength);
+      if ((vi - firstvar) / vectorlength == 0) {
         /* temporal component */
         int const off = 0;
         tensortype = &scalar;
-        basevar = firstvar + off;
-        var = vi - basevar;
+        basevar = firstvar + off * vectorlength;
+        var = (vi - basevar) / vectorlength;
       } else {
         /* spatial components */
         int const off = 1;
         tensortype = &vector;
-        basevar = firstvar + off;
-        var = vi - basevar;
+        basevar = firstvar + off * vectorlength;
+        var = (vi - basevar) / vectorlength;
       }
     } else if (CCTK_EQUALS (tensortypealias, "uu")
                || CCTK_EQUALS (tensortypealias, "ud")
                || CCTK_EQUALS (tensortypealias, "du")
                || CCTK_EQUALS (tensortypealias, "dd")) {
       /* tensor */
-      assert (numvars == DIM*DIM);
+      assert (numvars == DIM*DIM*vectorlength);
       tensortype = &tensor;
       basevar = firstvar;
-      var = vi - basevar;
+      var = (vi - basevar) / vectorlength;
     } else if (CCTK_EQUALS (tensortypealias, "uu_sym")
                || CCTK_EQUALS (tensortypealias, "dd_sym")) {
       /* symmetric tensor */
-      assert (numvars == DIM*(DIM+1)/2);
+      assert (numvars == DIM*(DIM+1)/2*vectorlength);
       tensortype = &symmtensor;
       basevar = firstvar;
-      var = vi - basevar;
+      var = (vi - basevar) / vectorlength;
     } else if (CCTK_EQUALS (tensortypealias, "ddd_sym")) {
       /* 3rd rank tensor, symmetric in last 2 indices */
-      assert (numvars == DIM*DIM*(DIM+1)/2);
+      assert (numvars == DIM*DIM*(DIM+1)/2*vectorlength);
       tensortype = &symmtensor3b;
       basevar = firstvar;
-      var = vi - basevar;
+      var = (vi - basevar) / vectorlength;
     } else if (CCTK_EQUALS (tensortypealias, "4uu_sym")
                || CCTK_EQUALS (tensortypealias, "4dd_sym")) {
       /* symmetric 4-tensor */
-      assert (numvars == (DIM+1)*(DIM+2)/2);
-      if (vi == firstvar) {
+      assert (numvars == (DIM+1)*(DIM+2)/2*vectorlength);
+      if ((vi - firstvar) / vectorlength == 0) {
         /* temporal-temporal component */
         int const off = 0;
         tensortype = &scalar;
-        basevar = firstvar + off;
-        var = vi - basevar;
+        basevar = firstvar + off * vectorlength;
+        var = (vi - basevar) / vectorlength;
       } else if (vi < firstvar+DIM+1) {
         /* temporal-spatial components */
         int const off = 1;
         tensortype = &vector;
-        basevar = firstvar + off;
-        var = vi - basevar;
+        basevar = firstvar + off * vectorlength;
+        var = (vi - basevar) / vectorlength;
       } else {
         /* spatial-spatial components */
         int const off = DIM+1;
         tensortype = &symmtensor;
-        basevar = firstvar + off;
-        var = vi - basevar;
+        basevar = firstvar + off * vectorlength;
+        var = (vi - basevar) / vectorlength;
       }
     } else {
       char * groupname = CCTK_GroupName(gi);
diff --git a/src/rotatingsymmetry90.c b/src/rotatingsymmetry90.c
index 038de32..f1e784f 100644
--- a/src/rotatingsymmetry90.c
+++ b/src/rotatingsymmetry90.c
@@ -78,6 +78,7 @@ int BndRot90VI (cGH const * restrict const cctkGH,
   char * restrict fullname;
   void * restrict * restrict varptrs;
   int * restrict vartypes;
+  int * restrict vectorlengths;
   int firstvar;
   
   char tensortypealias[100];
@@ -139,6 +140,8 @@ int BndRot90VI (cGH const * restrict const cctkGH,
   assert (nvars==0 || varptrs);
   vartypes = malloc (nvars * sizeof  *vartypes);
   assert (nvars==0 || vartypes);
+  vectorlengths = malloc (nvars * sizeof  *vectorlengths);
+  assert (nvars==0 || vectorlengths);
   for (var=0; var<nvars; ++var) {
     gis[var] = CCTK_GroupIndexFromVarI (vis[var]);
     assert (gis[var]>=0 && gis[var]<CCTK_NumGroups());
@@ -156,6 +159,10 @@ int BndRot90VI (cGH const * restrict const cctkGH,
     
     vartypes[var] = group.vartype;
     assert (vartypes[var] >= 0);
+
+    vectorlengths[var] = group.vectorlength;
+    assert (vectorlengths[var]>=0);
+    assert (vectorlengths[var]==1 || group.vectorgroup);
   }
   
   for (d=0; d<group.dim; ++d) {
@@ -227,10 +234,19 @@ int BndRot90VI (cGH const * restrict const cctkGH,
     
     for (var=0; var<nvars; ++var) {
       
+      /* Cactus lays out variables of a group
+       * CCTK_REAL vel[3] {vx,vy,vz}
+       * like this:
+       * vx[0], vx[1], vx[2], vy[0], vy[1], ...
+       * so the component x,y,z is given by index / vectorlength and the
+       * vector index vx[i] by index % vectorlength.
+       */
+      const int vectorlength = vectorlengths[var];
+
       /* Find tensor type, source variable, and parity */
       {
         int table;
-        
+
         numvars = CCTK_NumVarsInGroupI(gis[var]);
         assert (numvars>0);
         firstvar = CCTK_FirstVarIndexI(gis[var]);
@@ -239,7 +255,7 @@ int BndRot90VI (cGH const * restrict const cctkGH,
         assert (index>=0 && index<numvars);
         table = CCTK_GroupTagsTableI(gis[var]);
         assert (table>=0);
-        
+
         ierr = Util_TableGetString
           (table, sizeof tensortypealias, tensortypealias, "tensortypealias");
         if (ierr == UTIL_ERROR_TABLE_NO_SUCH_KEY) {
@@ -276,31 +292,32 @@ int BndRot90VI (cGH const * restrict const cctkGH,
         } else if (CCTK_EQUALS (tensortypealias, "u")
                    || CCTK_EQUALS (tensortypealias, "d")) {
           /* vector */
-          assert (numvars == DIM);
+          assert ((numvars == DIM*vectorlength) ||
+                  (numvars == DIM && vectorlength == DIM));
         } else if (CCTK_EQUALS (tensortypealias, "4u")
                    || CCTK_EQUALS (tensortypealias, "4d")) {
           /* 4-vector */
-          assert (numvars == DIM+1);
+          assert (numvars == (DIM+1)*vectorlength);
         } else if (CCTK_EQUALS (tensortypealias, "uu")
                    || CCTK_EQUALS (tensortypealias, "ud")
                    || CCTK_EQUALS (tensortypealias, "du")
                    || CCTK_EQUALS (tensortypealias, "dd")) {
           /* tensor */
-          assert (numvars == DIM*DIM);
+          assert (numvars == DIM*DIM*vectorlength);
         } else if (CCTK_EQUALS (tensortypealias, "uu_sym")
                    || CCTK_EQUALS (tensortypealias, "dd_sym")) {
           /* symmetric tensor */
-          assert (numvars == DIM*(DIM+1)/2);
+          assert (numvars == DIM*(DIM+1)/2*vectorlength);
         } else if (CCTK_EQUALS (tensortypealias, "ddd_sym")) {
           /* 3rd rank tensor, symmetric in last 2 indices */
-          assert (numvars == DIM*DIM*(DIM+1)/2);
+          assert (numvars == DIM*DIM*(DIM+1)/2*vectorlength);
         } else if (CCTK_EQUALS (tensortypealias, "4uu_sym")
                    || CCTK_EQUALS (tensortypealias, "4dd_sym")) {
           /* symmetric 4-tensor */
-          assert (numvars == (DIM+1)*(DIM+2)/2);
+          assert (numvars == (DIM+1)*(DIM+2)/2*vectorlength);
         } else if (CCTK_EQUALS (tensortypealias, "weylscalars_real")) {
           /* Weyl scalars, stored as 10 real numbers */
-          assert (numvars == 10);
+          assert (numvars == 10*vectorlength);
         } else {
           char * groupname = CCTK_GroupName(gis[var]);
           assert (groupname);
@@ -324,22 +341,28 @@ int BndRot90VI (cGH const * restrict const cctkGH,
                  || CCTK_EQUALS (tensortypealias, "d")) {
         /* vector */
         int srcindex;
-        assert (index>=0 && index<DIM);
-        srcindex = convert_index (step, index, alldirs, &parities[var]);
+        /* special case for vel[i] */
+        assert (index>=0 && index<DIM*vectorlength);
+        if(numvars == DIM && vectorlength == DIM) {
+          srcindex = convert_index (step, index, alldirs, &parities[var]);
+        } else {
+          srcindex = index % vectorlength + vectorlength *
+                     convert_index (step, index/vectorlength, alldirs, &parities[var]);
+        }
         srcvi = firstvar + srcindex;
       } else if (CCTK_EQUALS (tensortypealias, "4u")
                  || CCTK_EQUALS (tensortypealias, "4d")) {
         /* 4-vector */
-        assert (index>=0 && index<DIM+1);
-        if (index==0) {
+        assert (index>=0 && index<(DIM+1)*vectorlength);
+        if (index/vectorlength==0) {
           /* temporal component */
           srcvi = firstvar;
         } else {
           /* spatial components */
           int srcindex;
           int const off = 1;
-          srcindex
-            = off + convert_index (step, index-off, alldirs, &parities[var]);
+          srcindex = index % vectorlength + vectorlength * (off +
+                     convert_index (step, index/vectorlength-off, alldirs, &parities[var]));
           srcvi = firstvar + srcindex;
         }
       } else if (CCTK_EQUALS (tensortypealias, "uu")
@@ -351,12 +374,13 @@ int BndRot90VI (cGH const * restrict const cctkGH,
         int index1, index2;
         int srcindex1, srcindex2;
         int srcindex;
-        assert (index>=0 && index<DIM*DIM);
-        index1 = index / DIM;
-        index2 = index % DIM;
+        assert (index>=0 && index<DIM*DIM*vectorlength);
+        index1 = (index / vectorlength) / DIM;
+        index2 = (index / vectorlength) % DIM;
         srcindex1 = convert_index (step, index1, alldirs, &parities[var]);
         srcindex2 = convert_index (step, index2, alldirs, &parities[var]);
-        srcindex = srcindex1 * DIM + srcindex2;
+        srcindex = index % vectorlength +
+                   (srcindex1 * DIM + srcindex2) * vectorlength;
         srcvi = firstvar + srcindex;
       } else if (CCTK_EQUALS (tensortypealias, "uu_sym")
                  || CCTK_EQUALS (tensortypealias, "dd_sym")) {
@@ -364,18 +388,19 @@ int BndRot90VI (cGH const * restrict const cctkGH,
         int index1, index2;
         int srcindex1, srcindex2;
         int srcindex;
-        assert (index>=0 && index<DIM*(DIM+1)/2);
+        assert (index>=0 && index<DIM*(DIM+1)/2*vectorlength);
         {
           int const expand1[DIM*(DIM+1)/2] = { 0,0,0,1,1,2 };
           int const expand2[DIM*(DIM+1)/2] = { 0,1,2,1,2,2 };
-          index1 = expand1[index];
-          index2 = expand2[index];
+          index1 = expand1[index/vectorlength];
+          index2 = expand2[index/vectorlength];
         }
         srcindex1 = convert_index (step, index1, alldirs, &parities[var]);
         srcindex2 = convert_index (step, index2, alldirs, &parities[var]);
         {
           int const compact[DIM][DIM] = { { 0,1,2 }, { 1,3,4 }, { 2,4,5 } };
-          srcindex = compact[srcindex1][srcindex2];
+          srcindex = index % vectorlength +
+                     compact[srcindex1][srcindex2]*vectorlength;
         }
         srcvi = firstvar + srcindex;
       } else if (CCTK_EQUALS (tensortypealias, "ddd_sym")) {
@@ -383,7 +408,7 @@ int BndRot90VI (cGH const * restrict const cctkGH,
         int index1, index2, index3;
         int srcindex1, srcindex2, srcindex3;
         int srcindex;
-        assert (index>=0 && index<DIM*DIM*(DIM+1)/2);
+        assert (index>=0 && index<DIM*DIM*(DIM+1)/2*vectorlength);
         {
           int const expand1[DIM*DIM*(DIM+1)/2] =
             { 0,0,0,0,0,0, 1,1,1,1,1,1, 2,2,2,2,2,2 };
@@ -391,9 +416,9 @@ int BndRot90VI (cGH const * restrict const cctkGH,
             { 0,0,0,1,1,2, 0,0,0,1,1,2, 0,0,0,1,1,2 };
           int const expand3[DIM*DIM*(DIM+1)/2] =
             { 0,1,2,1,2,2, 0,1,2,1,2,2, 0,1,2,1,2,2 };
-          index1 = expand1[index];
-          index2 = expand2[index];
-          index3 = expand3[index];
+          index1 = expand1[index/vectorlength];
+          index2 = expand2[index/vectorlength];
+          index3 = expand3[index/vectorlength];
         }
         srcindex1 = convert_index (step, index1, alldirs, &parities[var]);
         srcindex2 = convert_index (step, index2, alldirs, &parities[var]);
@@ -403,22 +428,23 @@ int BndRot90VI (cGH const * restrict const cctkGH,
             { { {  0, 1, 2 }, {  1, 3, 4 }, {  2, 4, 5 } },
               { {  6, 7, 8 }, {  7, 9,10 }, {  8,10,11 } },
               { { 12,13,14 }, { 13,15,16 }, { 14,16,17 } } };
-          srcindex = compact[srcindex1][srcindex2][srcindex3];
+          srcindex = index % vectorlength +
+                     compact[srcindex1][srcindex2][srcindex3]*vectorlength;
         }
         srcvi = firstvar + srcindex;
       } else if (CCTK_EQUALS (tensortypealias, "4uu_sym")
                  || CCTK_EQUALS (tensortypealias, "4dd_sym")) {
         /* symmetric 4-tensor */
-        assert (index>=0 && index<(DIM+1)*(DIM+2)/2);
-        if (index==0) {
+        assert (index>=0 && index<(DIM+1)*(DIM+2)/2*vectorlength);
+        if (index/vectorlength==0) {
           /* temporal-temporal component */
           srcvi = firstvar;
-        } else if (index<DIM+1) {
+        } else if (index<(DIM+1)*vectorlength) {
           /* temporal-spatial components */
           int srcindex;
           int const off = 1;
-          srcindex
-            = off + convert_index (step, index-off, alldirs, &parities[var]);
+          srcindex = index % vectorlength + vectorlength * (off +
+                     convert_index (step, index/vectorlength-off, alldirs, &parities[var]));
           srcvi = firstvar + srcindex;
         } else {
           /* spatial-spatial components */
@@ -429,20 +455,21 @@ int BndRot90VI (cGH const * restrict const cctkGH,
           {
             int const expand1[DIM*(DIM+1)/2] = { 0,0,0,1,1,2 };
             int const expand2[DIM*(DIM+1)/2] = { 0,1,2,1,2,2 };
-            index1 = expand1[index-off];
-            index2 = expand2[index-off];
+            index1 = expand1[index/vectorlength-off];
+            index2 = expand2[index/vectorlength-off];
           }
           srcindex1 = convert_index (step, index1, alldirs, &parities[var]);
           srcindex2 = convert_index (step, index2, alldirs, &parities[var]);
           {
             int const compact[DIM][DIM] = { { 0,1,2 }, { 1,3,4 }, { 2,4,5 } };
-            srcindex = off + compact[srcindex1][srcindex2];
+            srcindex = index % vectorlength + vectorlength *
+                       (off + compact[srcindex1][srcindex2]);
           }
           srcvi = firstvar + srcindex;
         }
       } else if (CCTK_EQUALS (tensortypealias, "weylscalars_real")) {
         /* Weyl scalars, stored as 10 reals */
-        assert (index>=0 && index<10);
+        assert (index>=0 && index<10*vectorlength);
         srcvi = vis[var];
       } else {
         assert (0);
@@ -803,6 +830,7 @@ int BndRot90VI (cGH const * restrict const cctkGH,
   
   free (gis);
   free (varptrs);
+  free (vectorlengths);
   free (vartypes);
   free (parities);
   free (srcptrs);
-- 
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