From 2fde94041e4e1b66ec18911b910ee391303001f8 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Tue, 4 May 2004 23:33:45 +0000
Subject: [PATCH] fix vertex-ordering

---
 pandatool/src/dxfprogs/eggToDXFLayer.cxx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pandatool/src/dxfprogs/eggToDXFLayer.cxx b/pandatool/src/dxfprogs/eggToDXFLayer.cxx
index 4e4ee7fbe2..a4f634700d 100644
--- a/pandatool/src/dxfprogs/eggToDXFLayer.cxx
+++ b/pandatool/src/dxfprogs/eggToDXFLayer.cxx
@@ -180,9 +180,11 @@ write_3d_face(EggPolygon *poly, ostream &out) {
     out << "0\n3DFACE\n"
 	<< "8\n" << _group->get_name() << "\n";
 
+    // Since DXF uses a clockwise ordering convention, we must
+    // reverse the order in which we write out the vertices.
     int i;
-    EggPolygon::iterator vi;
-    for (i = 0, vi = poly->begin(); vi != poly->end(); ++i, ++vi) {
+    EggPolygon::reverse_iterator vi;
+    for (i = 0, vi = poly->rbegin(); vi != poly->rend(); ++i, ++vi) {
       EggVertex *vtx = (*vi);
       LVecBase3d pos = vtx->get_pos3() * _group->get_vertex_frame();
       out << 10 + i << "\n" << pos[0] << "\n"