Add visual samples.

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diff --git a/NvCloth/samples/SampleBase/renderer/PxRenderBuffer.h b/NvCloth/samples/SampleBase/renderer/PxRenderBuffer.h
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+// 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) 2008-2017 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
+
+
+#ifndef PX_FOUNDATION_PXRENDERBUFFER_H
+#define PX_FOUNDATION_PXRENDERBUFFER_H
+
+/** \addtogroup common
+@{
+*/
+
+#include "PxPhysXCommonConfig.h"
+#include "foundation/PxVec3.h"
+#include "foundation/PxMat33.h"
+#include "foundation/PxBounds3.h"
+
+#if !PX_DOXYGEN
+namespace physx
+{
+#endif
+
+/**
+\brief Default color values used for debug rendering.
+*/
+struct PxDebugColor
+{
+	enum Enum
+	{
+		eARGB_BLACK		= 0xff000000,
+		eARGB_RED		= 0xffff0000,
+		eARGB_GREEN		= 0xff00ff00,
+		eARGB_BLUE		= 0xff0000ff,
+		eARGB_YELLOW	= 0xffffff00,
+		eARGB_MAGENTA	= 0xffff00ff,
+		eARGB_CYAN		= 0xff00ffff,
+		eARGB_WHITE		= 0xffffffff,
+		eARGB_GREY		= 0xff808080,
+		eARGB_DARKRED	= 0x88880000,
+		eARGB_DARKGREEN	= 0x88008800,
+		eARGB_DARKBLUE	= 0x88000088
+	};
+};
+
+/**
+\brief Used to store a single point and colour for debug rendering.
+*/
+struct PxDebugPoint
+{
+	PxDebugPoint(const PxVec3& p, const PxU32& c)
+		: pos(p), color(c) {}
+
+	PxVec3	pos;
+	PxU32	color;
+};
+
+/**
+\brief Used to store a single line and colour for debug rendering.
+*/
+struct PxDebugLine
+{
+	PxDebugLine(const PxVec3& p0, const PxVec3& p1, const PxU32& c)
+		: pos0(p0), color0(c), pos1(p1), color1(c) {}
+
+	PxVec3	pos0;
+	PxU32	color0;
+	PxVec3	pos1;
+	PxU32	color1;
+};
+
+/**
+\brief Used to store a single triangle and colour for debug rendering.
+*/
+struct PxDebugTriangle
+{
+	PxDebugTriangle(const PxVec3& p0, const PxVec3& p1, const PxVec3& p2, const PxU32& c)
+		: pos0(p0), color0(c), pos1(p1), color1(c), pos2(p2), color2(c) {}
+
+	PxVec3	pos0;
+	PxU32	color0;
+	PxVec3	pos1;
+	PxU32	color1;
+	PxVec3	pos2;
+	PxU32	color2;
+};
+
+/**
+\brief Used to store a text for debug rendering. Doesn't own 'string' array.
+*/
+struct PxDebugText
+{
+	PxDebugText() : string(0) {}
+
+	PxDebugText(const PxVec3& p, const PxReal& s, const PxU32& c, const char* str)
+		: position(p), size(s), color(c), string(str) {}
+
+	PxVec3		position;
+	PxReal		size;
+	PxU32		color;
+	const char*	string;
+};
+
+/**
+\brief Interface for points, lines, triangles, and text buffer.
+*/
+class PxRenderBuffer
+{
+public:
+	virtual ~PxRenderBuffer() {}
+
+	virtual PxU32 getNbPoints() const = 0;
+	virtual const PxDebugPoint* getPoints() const = 0;
+
+	virtual PxU32 getNbLines() const = 0;
+	virtual const PxDebugLine* getLines() const = 0;
+
+	virtual PxU32 getNbTriangles() const = 0;
+	virtual const PxDebugTriangle* getTriangles() const = 0;
+
+	virtual PxU32 getNbTexts() const = 0;
+	virtual const PxDebugText* getTexts() const = 0;
+
+	virtual void append(const PxRenderBuffer& other) = 0;
+	virtual void clear() = 0;
+};
+
+#if !PX_DOXYGEN
+} // namespace physx
+#endif
+
+/** @} */
+#endif