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PxVec2.h

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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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#ifndef PXFOUNDATION_PXVEC2_H
#define PXFOUNDATION_PXVEC2_H

#include "foundation/PxMath.h"

#if !PX_DOXYGEN
namespace physx
{
#endif

class PxVec2
{
  public:
    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2()
    {
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2(PxZERO r) : x(0.0f), y(0.0f)
    {
        PX_UNUSED(r);
    }

    explicit PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2(float a) : x(a), y(a)
    {
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2(float nx, float ny) : x(nx), y(ny)
    {
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2(const PxVec2& v) : x(v.x), y(v.y)
    {
    }

    // Operators

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2& operator=(const PxVec2& p)
    {
        x = p.x;
        y = p.y;
        return *this;
    }

    PX_DEPRECATED PX_CUDA_CALLABLE PX_FORCE_INLINE float& operator[](int index)
    {
        PX_ASSERT(index >= 0 && index <= 1);

        return reinterpret_cast<float*>(this)[index];
    }

    PX_DEPRECATED PX_CUDA_CALLABLE PX_FORCE_INLINE const float& operator[](int index) const
    {
        PX_ASSERT(index >= 0 && index <= 1);

        return reinterpret_cast<const float*>(this)[index];
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE bool operator==(const PxVec2& v) const
    {
        return x == v.x && y == v.y;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE bool operator!=(const PxVec2& v) const
    {
        return x != v.x || y != v.y;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE bool isZero() const
    {
        return x == 0.0f && y == 0.0f;
    }

    PX_CUDA_CALLABLE PX_INLINE bool isFinite() const
    {
        return PxIsFinite(x) && PxIsFinite(y);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE bool isNormalized() const
    {
        const float unitTolerance = 1e-4f;
        return isFinite() && PxAbs(magnitude() - 1) < unitTolerance;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE float magnitudeSquared() const
    {
        return x * x + y * y;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE float magnitude() const
    {
        return PxSqrt(magnitudeSquared());
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 operator-() const
    {
        return PxVec2(-x, -y);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 operator+(const PxVec2& v) const
    {
        return PxVec2(x + v.x, y + v.y);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 operator-(const PxVec2& v) const
    {
        return PxVec2(x - v.x, y - v.y);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 operator*(float f) const
    {
        return PxVec2(x * f, y * f);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 operator/(float f) const
    {
        f = 1.0f / f; // PT: inconsistent notation with operator /=
        return PxVec2(x * f, y * f);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2& operator+=(const PxVec2& v)
    {
        x += v.x;
        y += v.y;
        return *this;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2& operator-=(const PxVec2& v)
    {
        x -= v.x;
        y -= v.y;
        return *this;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2& operator*=(float f)
    {
        x *= f;
        y *= f;
        return *this;
    }
    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2& operator/=(float f)
    {
        f = 1.0f / f; // PT: inconsistent notation with operator /
        x *= f;
        y *= f;
        return *this;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE float dot(const PxVec2& v) const
    {
        return x * v.x + y * v.y;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 getNormalized() const
    {
        const float m = magnitudeSquared();
        return m > 0.0f ? *this * PxRecipSqrt(m) : PxVec2(0, 0);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE float normalize()
    {
        const float m = magnitude();
        if(m > 0.0f)
            *this /= m;
        return m;
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 multiply(const PxVec2& a) const
    {
        return PxVec2(x * a.x, y * a.y);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 minimum(const PxVec2& v) const
    {
        return PxVec2(PxMin(x, v.x), PxMin(y, v.y));
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE float minElement() const
    {
        return PxMin(x, y);
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE PxVec2 maximum(const PxVec2& v) const
    {
        return PxVec2(PxMax(x, v.x), PxMax(y, v.y));
    }

    PX_CUDA_CALLABLE PX_FORCE_INLINE float maxElement() const
    {
        return PxMax(x, y);
    }

    float x, y;
};

PX_CUDA_CALLABLE static PX_FORCE_INLINE PxVec2 operator*(float f, const PxVec2& v)
{
    return PxVec2(f * v.x, f * v.y);
}

#if !PX_DOXYGEN
} // namespace physx
#endif

#endif // #ifndef PXFOUNDATION_PXVEC2_H

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