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]
---
 PhysX_3.4/Samples/SampleCustomGravity/Planet.cpp | 151 +++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 PhysX_3.4/Samples/SampleCustomGravity/Planet.cpp

(limited to 'PhysX_3.4/Samples/SampleCustomGravity/Planet.cpp')

diff --git a/PhysX_3.4/Samples/SampleCustomGravity/Planet.cpp b/PhysX_3.4/Samples/SampleCustomGravity/Planet.cpp
new file mode 100644
index 00000000..5f347a88
--- /dev/null
+++ b/PhysX_3.4/Samples/SampleCustomGravity/Planet.cpp
@@ -0,0 +1,151 @@
+// 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 "Planet.h"
+#include "RendererMemoryMacros.h"
+#include "foundation/PxPlane.h"
+#include "foundation/PxAssert.h"
+#include "PxTkRandom.h"
+
+PlanetMesh::PlanetMesh() :
+	mNbVerts	(0),
+	mNbTris		(0),
+	mVerts		(NULL),
+	mIndices	(NULL)
+{
+}
+
+PlanetMesh::~PlanetMesh()
+{
+	DELETEARRAY(mIndices);
+	DELETEARRAY(mVerts);
+}
+
+PxU8 PlanetMesh::checkCulling(const PxVec3& center, PxU32 index0, PxU32 index1, PxU32 index2) const
+{
+	const PxPlane tmp(mVerts[index0], mVerts[index1], mVerts[index2]);
+	return tmp.distance(center)>0.0f;
+}
+
+void PlanetMesh::generate(const PxVec3& center, PxF32 radius, PxU32 nbX, PxU32 nbY)
+{
+	DELETEARRAY(mIndices);
+	DELETEARRAY(mVerts);
+
+	mNbVerts = 6*nbX*nbY;
+	mVerts = new PxVec3[mNbVerts];
+	PxU32 index=0;
+	for(PxU32 i=0;i<6;i++)
+	{
+		for(PxU32 y=0;y<nbY;y++)
+		{
+			const PxF32 coeffY = float(y)/float(nbY-1);
+			for(PxU32 x=0;x<nbX;x++)
+			{
+				const PxF32 coeffX = float(x)/float(nbX-1);
+				const PxF32 xr = coeffX-0.5f;
+				const PxF32 yr = coeffY-0.5f;
+
+				PxVec3 offset;
+				if(i==0)
+				{
+					offset = PxVec3(xr, yr, 0.5f);
+				}
+				else if(i==1)
+				{
+					offset = PxVec3(xr, yr, -0.5f);
+				}
+				else if(i==2)
+				{
+					offset = PxVec3(xr, 0.5f, yr);
+				}
+				else if(i==3)
+				{
+					offset = PxVec3(xr, -0.5f, yr);
+				}
+				else if(i==4)
+				{
+					offset = PxVec3(0.5f, xr, yr);
+				}
+				else
+				{
+					offset = PxVec3(-0.5f, xr, yr);
+				}
+
+				offset.normalize();
+
+				const float h = sinf(offset.z*10.0f)*sinf(offset.x*10.0f)*sinf(offset.y*10.0f)*2.0f;
+
+				offset *= (radius + h);
+
+				mVerts[index++] = center + offset;
+			}
+		}
+	}
+	PX_ASSERT(index==mNbVerts);
+
+	mNbTris = 6*(nbX-1)*(nbY-1)*2;
+	mIndices = new PxU32[mNbTris*3];
+	PxU32 offset = 0;
+	PxU32 baseOffset = 0;
+	for(PxU32 i=0;i<6;i++)
+	{
+		for(PxU32 y=0;y<nbY-1;y++)
+		{
+			for(PxU32 x=0;x<nbX-1;x++)
+			{
+				const PxU32 index0a = baseOffset + x;
+				const PxU32 index1a = baseOffset + x + nbX;
+				const PxU32 index2a = baseOffset + x + nbX + 1;
+
+				const PxU32 index0b = index0a;
+				const PxU32 index1b = index2a;
+				const PxU32 index2b = baseOffset + x + 1;
+
+				{
+					const PxU8 c = checkCulling(center, index0a, index1a, index2a);
+					mIndices[offset]		= index0a;
+					mIndices[offset+1+c]	= index1a;
+					mIndices[offset+2-c]	= index2a;
+					offset+=3;
+				}
+				{
+					const PxU8 c = checkCulling(center, index0b, index1b, index2b);
+					mIndices[offset]		= index0b;
+					mIndices[offset+1+c]	= index1b;
+					mIndices[offset+2-c]	= index2b;
+					offset+=3;
+				}
+			}
+			baseOffset += nbX;
+		}
+		baseOffset += nbX;
+	}
+	PX_ASSERT(offset==mNbTris*3);
+}
\ No newline at end of file
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