From 3b17f6feb768ef00a03bfb1ac12c39eb46b5f238 Mon Sep 17 00:00:00 2001
From: schnetter <schnetter@6ca9aeac-0e4f-0410-a746-fe4df63e9d0c>
Date: Thu, 11 Aug 2005 16:30:21 +0000
Subject: Support taking space or time derivatives while interpolating.  So far
 implemented only for interpolating into 1D arrays.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/InterpToArray/trunk@5 6ca9aeac-0e4f-0410-a746-fe4df63e9d0c
---
 param.ccl    | 10 ++++++++++
 src/interp.c | 35 ++++++++++++++++++++++++++++++++++-
 2 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/param.ccl b/param.ccl
index fee89d6..ab270b4 100644
--- a/param.ccl
+++ b/param.ccl
@@ -59,6 +59,16 @@ STRING array1d_vars[100] "Names of the grid functions that should be interpolate
   "^[A-Za-z][A-Za-z0-9_]*[:][:][A-Za-z][A-Za-z0-9_]*$" :: "grid function name"
 } ""
 
+INT array1d_spacederivs[100] "Space derivative orders for each grid function"
+{
+  0:* :: ""
+} 0
+
+INT array1d_timederivs[100] "Time derivative order for each grid function"
+{
+  0:* :: ""
+} 0
+
 REAL array1d_x0 "Origin" STEERABLE=always
 {
   *:* :: ""
diff --git a/src/interp.c b/src/interp.c
index badaead..91a84b8 100644
--- a/src/interp.c
+++ b/src/interp.c
@@ -28,6 +28,8 @@ InterpToArray (CCTK_ARGUMENTS)
   CCTK_INT * restrict inputs;
   CCTK_INT * restrict output_types;
   CCTK_POINTER * restrict outputs;
+  CCTK_INT * restrict operation_codes;
+  CCTK_INT * restrict time_deriv_order;
   
   int nvars;
   int npoints;
@@ -97,7 +99,7 @@ InterpToArray (CCTK_ARGUMENTS)
       for (n=0; n<nvars; ++n) {
         outputs[n] = &scalars[npoints * n];
       }
-    
+
       ierr = CCTK_InterpGridArrays
         (cctkGH, 3, interpolator, options_table, coord_handle,
          npoints, CCTK_VARIABLE_REAL, coords,
@@ -165,19 +167,50 @@ InterpToArray (CCTK_ARGUMENTS)
       for (n=0; n<nvars; ++n) {
         outputs[n] = &arrays1d[npoints * n];
       }
+
+      operation_codes = malloc (nvars * sizeof * operation_codes);
+      assert (operation_codes);
+    
+      for (n=0; n<nvars; ++n) {
+        operation_codes[n] = array1d_spacederivs[n];
+      }
+    
+      ierr = Util_TableSetIntArray
+        (options_table, nvars, operation_codes, "operation_codes");
+      assert (! ierr);
+
+      time_deriv_order = malloc (nvars * sizeof * time_deriv_order);
+      assert (time_deriv_order);
+    
+      for (n=0; n<nvars; ++n) {
+        time_deriv_order[n] = array1d_timederivs[n];
+      }
     
+      ierr = Util_TableSetIntArray
+        (options_table, nvars, time_deriv_order, "time_deriv_order");
+      assert (! ierr);
+
       ierr = CCTK_InterpGridArrays
         (cctkGH, 3, interpolator, options_table, coord_handle,
          npoints, CCTK_VARIABLE_REAL, coords,
          nvars, inputs,
          nvars, output_types, outputs);
+      assert (! ierr);
+    
+      ierr = Util_TableDeleteKey (options_table, "operation_codes");
+      assert (! ierr);
     
+      ierr = Util_TableDeleteKey (options_table, "time_deriv_order");
+      assert (! ierr);
+
       free (coordsx);
       free (coordsy);
       free (coordsz);
       free (inputs);
       free (output_types);
       free (outputs);
+      free (operation_codes);
+      free (time_deriv_order);
     }
   }
   
-- 
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