From 0ed7b5c508484e0c137b467f9d34346e351ad484 Mon Sep 17 00:00:00 2001
From: Erwin Coumans <erwincoumans@erwins-mbp.amd.com>
Date: Thu, 16 Jan 2014 15:53:53 -0800
Subject: [PATCH] adding check on low number of vertices fixes Mac OSX crash

---
 .../NarrowphaseCollision/kernels/satClipHullContacts.cl   | 8 ++++----
 .../NarrowphaseCollision/kernels/satClipHullContacts.h    | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/Bullet3OpenCL/NarrowphaseCollision/kernels/satClipHullContacts.cl b/src/Bullet3OpenCL/NarrowphaseCollision/kernels/satClipHullContacts.cl
index 9e9440531..c5c57cab0 100644
--- a/src/Bullet3OpenCL/NarrowphaseCollision/kernels/satClipHullContacts.cl
+++ b/src/Bullet3OpenCL/NarrowphaseCollision/kernels/satClipHullContacts.cl
@@ -189,8 +189,8 @@ int clipFaceGlobal(__global const float4* pVtxIn, int numVertsIn, float4 planeNo
 	float ds, de;
 	int numVertsOut = 0;
     //double-check next test
-    //	if (numVertsIn < 2)
-    //		return 0;
+    	if (numVertsIn < 2)
+    		return 0;
     
 	float4 firstVertex=pVtxIn[numVertsIn-1];
 	float4 endVertex = pVtxIn[0];
@@ -239,8 +239,8 @@ int clipFace(const float4* pVtxIn, int numVertsIn, float4 planeNormalWS,float pl
 	float ds, de;
 	int numVertsOut = 0;
 //double-check next test
-//	if (numVertsIn < 2)
-//		return 0;
+	if (numVertsIn < 2)
+		return 0;
 
 	float4 firstVertex=pVtxIn[numVertsIn-1];
 	float4 endVertex = pVtxIn[0];
diff --git a/src/Bullet3OpenCL/NarrowphaseCollision/kernels/satClipHullContacts.h b/src/Bullet3OpenCL/NarrowphaseCollision/kernels/satClipHullContacts.h
index f5250b192..5d863b487 100644
--- a/src/Bullet3OpenCL/NarrowphaseCollision/kernels/satClipHullContacts.h
+++ b/src/Bullet3OpenCL/NarrowphaseCollision/kernels/satClipHullContacts.h
@@ -568,8 +568,8 @@ static const char* satClipKernelsCL= \
 "	float ds, de;\n"
 "	int numVertsOut = 0;\n"
 "    //double-check next test\n"
-"    //	if (numVertsIn < 2)\n"
-"    //		return 0;\n"
+"    	if (numVertsIn < 2)\n"
+"    		return 0;\n"
 "    \n"
 "	float4 firstVertex=pVtxIn[numVertsIn-1];\n"
 "	float4 endVertex = pVtxIn[0];\n"
@@ -615,8 +615,8 @@ static const char* satClipKernelsCL= \
 "	float ds, de;\n"
 "	int numVertsOut = 0;\n"
 "//double-check next test\n"
-"//	if (numVertsIn < 2)\n"
-"//		return 0;\n"
+"	if (numVertsIn < 2)\n"
+"		return 0;\n"
 "	float4 firstVertex=pVtxIn[numVertsIn-1];\n"
 "	float4 endVertex = pVtxIn[0];\n"
 "	\n"