From b734491a7e6fa4ef792ed80f557ba5eb666d84e2 Mon Sep 17 00:00:00 2001
From: Mike Park <Mike.Park@NASA.gov>
Date: Mon, 26 Jul 2021 05:11:42 -0400
Subject: [PATCH] winds (flips) the tri written to avm

---
 src/ref_gather.c | 13 +++++++++++++
 src/ref_part.c   |  7 +++++++
 2 files changed, 20 insertions(+)

diff --git a/src/ref_gather.c b/src/ref_gather.c
index c8cf20754..afd1d3ced 100644
--- a/src/ref_gather.c
+++ b/src/ref_gather.c
@@ -2623,10 +2623,23 @@ static REF_STATUS ref_gather_avm(REF_GRID ref_grid, const char *filename) {
     REF_BOOL select_faceid = REF_FALSE;
     REF_INT faceid = 0;
     REF_BOOL pad = REF_TRUE;
+    REF_INT cell, temp_node;
+    /* avm winds tri different than EGADS */
+    each_ref_cell_valid_cell(ref_cell, cell) {
+      temp_node = ref_cell_c2n(ref_cell, 2, cell);
+      ref_cell_c2n(ref_cell, 2, cell) = ref_cell_c2n(ref_cell, 1, cell);
+      ref_cell_c2n(ref_cell, 1, cell) = temp_node;
+    }
     RSS(ref_gather_cell(ref_node, ref_cell, faceid_insted_of_c2n, always_id,
                         swap_endian, sixty_four_bit, select_faceid, faceid, pad,
                         file),
         "nodes");
+    /* wind back (flip) after write */
+    each_ref_cell_valid_cell(ref_cell, cell) {
+      temp_node = ref_cell_c2n(ref_cell, 2, cell);
+      ref_cell_c2n(ref_cell, 2, cell) = ref_cell_c2n(ref_cell, 1, cell);
+      ref_cell_c2n(ref_cell, 1, cell) = temp_node;
+    }
   } else {
     REF_CELL ref_cell = ref_grid_tet(ref_grid);
     REF_BOOL faceid_insted_of_c2n = REF_FALSE;
diff --git a/src/ref_part.c b/src/ref_part.c
index ff96e668d..3b49a8168 100644
--- a/src/ref_part.c
+++ b/src/ref_part.c
@@ -1706,9 +1706,16 @@ static REF_STATUS ref_part_avm(REF_GRID *ref_grid_ptr, REF_MPI ref_mpi,
     REF_CELL ref_cell = ref_grid_tri(ref_grid);
     REF_INT version = 0;
     REF_BOOL pad = REF_FALSE;
+    REF_INT cell, temp_node;
     RSS(ref_part_meshb_cell(ref_cell, ntet, ref_node, nnode, version, pad,
                             file),
         "read tri");
+    /* avm winds tri different than EGADS */
+    each_ref_cell_valid_cell(ref_cell, cell) {
+      temp_node = ref_cell_c2n(ref_cell, 2, cell);
+      ref_cell_c2n(ref_cell, 2, cell) = ref_cell_c2n(ref_cell, 1, cell);
+      ref_cell_c2n(ref_cell, 1, cell) = temp_node;
+    }
   } else {
     REF_FILEPOS conn_offset, faceid_offset;
     REF_BOOL swap_endian = REF_FALSE;