From 3dfe2108cfab31ba3ee5527e217d0d8e99a51162 Mon Sep 17 00:00:00 2001
From: git perforce import user <a@b>
Date: Tue, 25 Oct 2016 12:29:14 -0600
Subject: Initial commit: PhysX 3.4.0 Update @ 21294896 APEX 1.4.0 Update @
 21275617

[CL 21300167]
---
 .../Source/GeomUtils/src/contact/GuFeatureCode.cpp | 128 +++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 PhysX_3.4/Source/GeomUtils/src/contact/GuFeatureCode.cpp

(limited to 'PhysX_3.4/Source/GeomUtils/src/contact/GuFeatureCode.cpp')

diff --git a/PhysX_3.4/Source/GeomUtils/src/contact/GuFeatureCode.cpp b/PhysX_3.4/Source/GeomUtils/src/contact/GuFeatureCode.cpp
new file mode 100644
index 00000000..f9bbd7e9
--- /dev/null
+++ b/PhysX_3.4/Source/GeomUtils/src/contact/GuFeatureCode.cpp
@@ -0,0 +1,128 @@
+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and related documentation and
+// any modifications thereto. Any use, reproduction, disclosure, or
+// distribution of this software and related documentation without an express
+// license agreement from NVIDIA Corporation is strictly prohibited.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2008-2016 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
+
+#include "GuConvexEdgeFlags.h"
+#include "GuFeatureCode.h"
+
+using namespace physx;
+using namespace Gu;
+
+static FeatureCode computeFeatureCode(PxReal u, PxReal v)
+{
+	// Analysis
+	if(u==0.0f)
+	{
+		if(v==0.0f)
+		{
+			// Vertex 0
+			return FC_VERTEX0;
+		}
+		else if(v==1.0f)
+		{
+			// Vertex 2
+			return FC_VERTEX2;
+		}
+		else
+		{
+			// Edge 0-2
+			return FC_EDGE20;
+		}
+	}
+	else if(u==1.0f)
+	{
+		if(v==0.0f)
+		{
+			// Vertex 1
+			return FC_VERTEX1;
+		}
+	}
+	else
+	{
+		if(v==0.0f)
+		{
+			// Edge 0-1
+			return FC_EDGE01;
+		}
+		else
+		{
+			if((u+v)>=0.9999f)
+			{
+				// Edge 1-2
+				return FC_EDGE12;
+			}
+			else
+			{
+				// Face
+				return FC_FACE;
+			}
+		}
+	}
+	return FC_UNDEFINED;
+}
+
+
+bool Gu::selectNormal(PxU8 data, PxReal u, PxReal v)
+{
+	bool useFaceNormal = false;
+	const FeatureCode FC = computeFeatureCode(u, v);
+	switch(FC)
+	{
+		case FC_VERTEX0:
+			if(!(data & (Gu::ETD_CONVEX_EDGE_01|Gu::ETD_CONVEX_EDGE_20)))
+				useFaceNormal = true;
+			break;
+		case FC_VERTEX1:
+			if(!(data & (Gu::ETD_CONVEX_EDGE_01|Gu::ETD_CONVEX_EDGE_12)))
+				useFaceNormal = true;
+			break;
+		case FC_VERTEX2:
+			if(!(data & (Gu::ETD_CONVEX_EDGE_12|Gu::ETD_CONVEX_EDGE_20)))
+				useFaceNormal = true;
+			break;
+		case FC_EDGE01:
+			if(!(data & Gu::ETD_CONVEX_EDGE_01))
+				useFaceNormal = true;
+			break;
+		case FC_EDGE12:
+			if(!(data & Gu::ETD_CONVEX_EDGE_12))
+				useFaceNormal = true;
+			break;
+		case FC_EDGE20:
+			if(!(data & Gu::ETD_CONVEX_EDGE_20))
+				useFaceNormal = true;
+			break;
+		case FC_FACE:
+			useFaceNormal = true;
+			break;
+		case FC_UNDEFINED:
+			break;
+	};
+	return useFaceNormal;
+}
+
-- 
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