From f3df0336964ba5b847e06f7044f0b4bd4d91a623 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Wed, 17 Mar 2010 22:31:45 +0000
Subject: [PATCH] fix is_2d() bug

---
 panda/src/pgraph/transformState.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/panda/src/pgraph/transformState.cxx b/panda/src/pgraph/transformState.cxx
index 3326d1172a..5d90849609 100644
--- a/panda/src/pgraph/transformState.cxx
+++ b/panda/src/pgraph/transformState.cxx
@@ -1758,7 +1758,7 @@ do_invert_compose(const TransformState *other) const {
   // _inv_mat has been allocated and filled in.
   nassertr(_inv_mat != (LMatrix4f *)NULL, make_invalid());
 
-  if (is_2d()) {
+  if (is_2d() && other->is_2d()) {
     const LMatrix4f &i = *_inv_mat;
     LMatrix3f inv3(i(0, 0), i(0, 1), i(0, 3),
                    i(1, 0), i(1, 1), i(1, 3),