From dbc464f831f674c79adfdf69f4d0d5d4727e3afc Mon Sep 17 00:00:00 2001
From: "erwin.coumans" <erwin.coumans@08e121b0-ae19-0410-a57b-3be3395fd4fd>
Date: Thu, 26 Jun 2008 23:52:39 +0000
Subject: [PATCH] Applied patch from Alex Silverman, to swap the
 partId/triangleId correctly.
 http://code.google.com/p/bullet/issues/detail?id=54 Thanks for the patch!

---
 Extras/GIMPACT/src/Bullet/btGImpactCollisionAlgorithm.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Extras/GIMPACT/src/Bullet/btGImpactCollisionAlgorithm.cpp b/Extras/GIMPACT/src/Bullet/btGImpactCollisionAlgorithm.cpp
index fd6ac20cf..31b5ab0aa 100755
--- a/Extras/GIMPACT/src/Bullet/btGImpactCollisionAlgorithm.cpp
+++ b/Extras/GIMPACT/src/Bullet/btGImpactCollisionAlgorithm.cpp
@@ -651,7 +651,10 @@ void btGImpactCollisionAlgorithm::gimpact_vs_shape(btCollisionObject * body0,
 	while(i--)
 	{
 		int child_index = collided_results[i];
-		m_triface0 = child_index;
+        if(swapped)
+    		m_triface1 = child_index;
+        else
+            m_triface0 = child_index;
 
 		btCollisionShape * colshape0 = retriever0.getChildShape(child_index);