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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) 2008-2014 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 NV_NVFOUNDATION_NVVEC2_H
+#define NV_NVFOUNDATION_NVVEC2_H
+
+/** \addtogroup foundation
+@{
+*/
+
+#include "NvMath.h"
+
+#if !NV_DOXYGEN
+namespace nvidia
+{
+#endif
+
+/**
+\brief 2 Element vector class.
+
+This is a 2-dimensional vector class with public data members.
+*/
+class NvVec2
+{
+  public:
+	/**
+	\brief default constructor leaves data uninitialized.
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2()
+	{
+	}
+
+	/**
+	\brief zero constructor.
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2(NvZERO r) : x(0.0f), y(0.0f)
+	{
+		NV_UNUSED(r);
+	}
+
+	/**
+	\brief Assigns scalar parameter to all elements.
+
+	Useful to initialize to zero or one.
+
+	\param[in] a Value to assign to elements.
+	*/
+	explicit NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2(float a) : x(a), y(a)
+	{
+	}
+
+	/**
+	\brief Initializes from 2 scalar parameters.
+
+	\param[in] nx Value to initialize X component.
+	\param[in] ny Value to initialize Y component.
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2(float nx, float ny) : x(nx), y(ny)
+	{
+	}
+
+	/**
+	\brief Copy ctor.
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2(const NvVec2& v) : x(v.x), y(v.y)
+	{
+	}
+
+	// Operators
+
+	/**
+	\brief Assignment operator
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2& operator=(const NvVec2& p)
+	{
+		x = p.x;
+		y = p.y;
+		return *this;
+	}
+
+	/**
+	\brief element access
+	*/
+	NV_DEPRECATED NV_CUDA_CALLABLE NV_FORCE_INLINE float& operator[](int index)
+	{
+		NV_ASSERT(index >= 0 && index <= 1);
+
+		return reinterpret_cast<float*>(this)[index];
+	}
+
+	/**
+	\brief element access
+	*/
+	NV_DEPRECATED NV_CUDA_CALLABLE NV_FORCE_INLINE const float& operator[](int index) const
+	{
+		NV_ASSERT(index >= 0 && index <= 1);
+
+		return reinterpret_cast<const float*>(this)[index];
+	}
+
+	/**
+	\brief returns true if the two vectors are exactly equal.
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE bool operator==(const NvVec2& v) const
+	{
+		return x == v.x && y == v.y;
+	}
+
+	/**
+	\brief returns true if the two vectors are not exactly equal.
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE bool operator!=(const NvVec2& v) const
+	{
+		return x != v.x || y != v.y;
+	}
+
+	/**
+	\brief tests for exact zero vector
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE bool isZero() const
+	{
+		return x == 0.0f && y == 0.0f;
+	}
+
+	/**
+	\brief returns true if all 2 elems of the vector are finite (not NAN or INF, etc.)
+	*/
+	NV_CUDA_CALLABLE NV_INLINE bool isFinite() const
+	{
+		return NvIsFinite(x) && NvIsFinite(y);
+	}
+
+	/**
+	\brief is normalized - used by API parameter validation
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE bool isNormalized() const
+	{
+		const float unitTolerance = 1e-4f;
+		return isFinite() && NvAbs(magnitude() - 1) < unitTolerance;
+	}
+
+	/**
+	\brief returns the squared magnitude
+
+	Avoids calling NvSqrt()!
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE float magnitudeSquared() const
+	{
+		return x * x + y * y;
+	}
+
+	/**
+	\brief returns the magnitude
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE float magnitude() const
+	{
+		return NvSqrt(magnitudeSquared());
+	}
+
+	/**
+	\brief negation
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 operator-() const
+	{
+		return NvVec2(-x, -y);
+	}
+
+	/**
+	\brief vector addition
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 operator+(const NvVec2& v) const
+	{
+		return NvVec2(x + v.x, y + v.y);
+	}
+
+	/**
+	\brief vector difference
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 operator-(const NvVec2& v) const
+	{
+		return NvVec2(x - v.x, y - v.y);
+	}
+
+	/**
+	\brief scalar post-multiplication
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 operator*(float f) const
+	{
+		return NvVec2(x * f, y * f);
+	}
+
+	/**
+	\brief scalar division
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 operator/(float f) const
+	{
+		f = 1.0f / f; // PT: inconsistent notation with operator /=
+		return NvVec2(x * f, y * f);
+	}
+
+	/**
+	\brief vector addition
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2& operator+=(const NvVec2& v)
+	{
+		x += v.x;
+		y += v.y;
+		return *this;
+	}
+
+	/**
+	\brief vector difference
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2& operator-=(const NvVec2& v)
+	{
+		x -= v.x;
+		y -= v.y;
+		return *this;
+	}
+
+	/**
+	\brief scalar multiplication
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2& operator*=(float f)
+	{
+		x *= f;
+		y *= f;
+		return *this;
+	}
+	/**
+	\brief scalar division
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2& operator/=(float f)
+	{
+		f = 1.0f / f; // PT: inconsistent notation with operator /
+		x *= f;
+		y *= f;
+		return *this;
+	}
+
+	/**
+	\brief returns the scalar product of this and other.
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE float dot(const NvVec2& v) const
+	{
+		return x * v.x + y * v.y;
+	}
+
+	/** return a unit vector */
+
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 getNormalized() const
+	{
+		const float m = magnitudeSquared();
+		return m > 0.0f ? *this * NvRecipSqrt(m) : NvVec2(0, 0);
+	}
+
+	/**
+	\brief normalizes the vector in place
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE float normalize()
+	{
+		const float m = magnitude();
+		if(m > 0.0f)
+			*this /= m;
+		return m;
+	}
+
+	/**
+	\brief a[i] * b[i], for all i.
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 multiply(const NvVec2& a) const
+	{
+		return NvVec2(x * a.x, y * a.y);
+	}
+
+	/**
+	\brief element-wise minimum
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 minimum(const NvVec2& v) const
+	{
+		return NvVec2(NvMin(x, v.x), NvMin(y, v.y));
+	}
+
+	/**
+	\brief returns MIN(x, y);
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE float minElement() const
+	{
+		return NvMin(x, y);
+	}
+
+	/**
+	\brief element-wise maximum
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE NvVec2 maximum(const NvVec2& v) const
+	{
+		return NvVec2(NvMax(x, v.x), NvMax(y, v.y));
+	}
+
+	/**
+	\brief returns MAX(x, y);
+	*/
+	NV_CUDA_CALLABLE NV_FORCE_INLINE float maxElement() const
+	{
+		return NvMax(x, y);
+	}
+
+	float x, y;
+};
+
+NV_CUDA_CALLABLE static NV_FORCE_INLINE NvVec2 operator*(float f, const NvVec2& v)
+{
+	return NvVec2(f * v.x, f * v.y);
+}
+
+#if !NV_DOXYGEN
+} // namespace nvidia
+#endif
+
+/** @} */
+#endif // #ifndef NV_NVFOUNDATION_NVVEC2_H