From 98bc87067e54f21301d12619588c271488edd412 Mon Sep 17 00:00:00 2001
From: tradke <tradke@94b1c47f-dcfd-45ef-a468-0854c0e9e350>
Date: Thu, 10 Jun 2004 16:40:47 +0000
Subject: Implement downsampling for IOASCII output. Set
 IO::out_downsample_[xyz] to change to default of no downsampling.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/IOASCII/trunk@182 94b1c47f-dcfd-45ef-a468-0854c0e9e350
---
 src/Write1D.c | 9 ++++++++-
 src/Write2D.c | 8 ++++++--
 src/Write3D.c | 8 ++++++--
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/src/Write1D.c b/src/Write1D.c
index 8ab3057..d40cb79 100644
--- a/src/Write1D.c
+++ b/src/Write1D.c
@@ -142,6 +142,7 @@ int IOASCII_Write1D (const cGH *GH, int vindex, const char *alias)
   FILE *file[8];
   CCTK_REAL offset;
   CCTK_REAL coord_lower[3];
+  CCTK_INT downsample[3];
   CCTK_INT *origin, *direction;
   CCTK_INT hsize, extent;
   CCTK_INT vindices[2];
@@ -263,6 +264,12 @@ int IOASCII_Write1D (const cGH *GH, int vindex, const char *alias)
   direction  = origin + gdata.dim;
   extent_int = malloc ((gdata.dim + 1) * sizeof (int));
 
+  /* set downsampling vector from I/O parameters */
+  downsample[0] = out_downsample_x;
+  downsample[1] = out_downsample_y;
+  downsample[2] = out_downsample_z;
+  downsample[3] = 1;
+
   /* get the variable's extents, compute the extent for 3D-diagonals as the
      minimum of grid points in each direction */
   CCTK_GroupgshVI (GH, gdata.dim, extent_int, vindex);
@@ -330,7 +337,7 @@ int IOASCII_Write1D (const cGH *GH, int vindex, const char *alias)
 
     mapping = Hyperslab_GlobalMappingByIndex (GH, vindex, 1,
                                               direction, origin, &extent,
-                                              NULL, /* downsample */
+                                              &downsample[dir],
                                               -1,   /* table handle */
                                               NULL  /* conversion fn */,
                                               &hsize);
diff --git a/src/Write2D.c b/src/Write2D.c
index 4c7db4d..5ddb038 100644
--- a/src/Write2D.c
+++ b/src/Write2D.c
@@ -142,7 +142,8 @@ int IOASCII_Write2D (const cGH *GH, int vindex, const char *alias)
   char *fullname, *groupname;
   int extent_int[3];
   CCTK_REAL offset[2];
-  CCTK_INT vindices[3], origin[3], extent[2], direction[6], hsize[2];
+  CCTK_INT vindices[3], origin[3], extent[2], direction[6], downsample[2],
+           hsize[2];
   void *hdata[3];
   FILE **fileset;
   DECLARE_CCTK_PARAMETERS
@@ -248,14 +249,17 @@ int IOASCII_Write2D (const cGH *GH, int vindex, const char *alias)
     if (dir == 0)
     {
       dir_i = 0; dir_j = 1;   /* xy */
+      downsample[0] = out_downsample_x; downsample[1] = out_downsample_y;
     }
     else if (dir == 1)
     {
       dir_i = 0; dir_j = 2;   /* xz */
+      downsample[0] = out_downsample_x; downsample[1] = out_downsample_z;
     }
     else
     {
       dir_i = 1; dir_j = 2;   /* yz */
+      downsample[0] = out_downsample_y; downsample[1] = out_downsample_z;
     }
 
     /* set the extent vector */
@@ -275,7 +279,7 @@ int IOASCII_Write2D (const cGH *GH, int vindex, const char *alias)
 
     mapping = Hyperslab_GlobalMappingByIndex (GH, vindex, 2,
                                               direction, origin, extent,
-                                              NULL, /* downsample */
+                                              downsample,
                                               -1,   /* table handle */
                                               NULL  /* conversion fn */,
                                               hsize);
diff --git a/src/Write3D.c b/src/Write3D.c
index 56fb233..4a6bab7 100644
--- a/src/Write3D.c
+++ b/src/Write3D.c
@@ -137,7 +137,7 @@ int IOASCII_Write3D (const cGH *GH, int vindex, const char *alias)
   int extent_int[3];
   CCTK_REAL offset[3];
   int mapping;
-  CCTK_INT vindices[4], extent[3], hsize[3];
+  CCTK_INT vindices[4], extent[3], downsample[3], hsize[3];
   const CCTK_INT origin[] = {0, 0, 0},
                  direction[] = {1, 0, 0, 0, 1, 0, 0, 0, 1};
   DECLARE_CCTK_PARAMETERS
@@ -227,10 +227,14 @@ int IOASCII_Write3D (const cGH *GH, int vindex, const char *alias)
     extent[i] = extent_int[i];
   }
 
+  downsample[0] = out_downsample_x;
+  downsample[1] = out_downsample_y;
+  downsample[2] = out_downsample_z;
+
   /* get the hyperslab mapping */
   mapping = Hyperslab_GlobalMappingByIndex (GH, vindex, 3,
                                             direction, origin, extent,
-                                            NULL, /* downsample */
+                                            downsample,
                                             -1,   /* table handle */
                                             NULL  /* conversion fn */,
                                             hsize);
-- 
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