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Copyright ©2015 Advanced Micro Devices, Inc. All rights reserved.

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•   Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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#ifndef FLOAT2_H
#define FLOAT2_H

#ifdef WIN32
#ifdef EXPORT_API
#define FRAPI __declspec(dllexport)
#else
#define FRAPI __declspec(dllimport)
#endif
#else
#define FRAPI
#endif

#include <cmath>
#include <algorithm>

namespace FireRays
{
    class FRAPI float2
    {
    public:
        float2(float xx = 0.f, float yy = 0.f) : x(xx), y(yy) {}

        float& operator [](int i)       { return *(&x + i); }
        float  operator [](int i) const { return *(&x + i); }
        float2 operator-() const        { return float2(-x, -y); }

        float  sqnorm() const           { return x*x + y*y; }
        void   normalize()              { (*this)/=(std::sqrt(sqnorm()));} 

        float2& operator += (float2 const& o) { x+=o.x; y+=o.y; return *this; }
        float2& operator -= (float2 const& o) { x-=o.x; y-=o.y; return *this; }
        float2& operator *= (float2 const& o) { x*=o.x; y*=o.y; return *this; }
        float2& operator *= (float c) { x*=c; y*=c; return *this; }
        float2& operator /= (float c) { float cinv = 1.f/c; x*=cinv; y*=cinv; return *this; }

        float x, y;
    };


    inline float2 operator+(float2 const& v1, float2 const& v2)
    {
        float2 res = v1;
        return res+=v2;
    }

    inline float2 operator-(float2 const& v1, float2 const& v2)
    {
        float2 res = v1;
        return res-=v2;
    }

    inline float2 operator*(float2 const& v1, float2 const& v2)
    {
        float2 res = v1;
        return res*=v2;
    }

    inline float2 operator*(float2 const& v1, float c)
    {
        float2 res = v1;
        return res*=c;
    }

    inline float2 operator*(float c, float2 const& v1)
    {
        return operator*(v1, c);
    }

    inline float dot(float2 const& v1, float2 const& v2)
    {
        return v1.x * v2.x + v1.y * v2.y;
    }

    inline float2 normalize(float2 const& v)
    {
        float2 res = v;
        res.normalize();
        return res;
    }

    inline float2 vmin(float2 const& v1, float2 const& v2)
    {
        return float2(std::min(v1.x, v2.x), std::min(v1.y, v2.y));
    }


    inline float2 vmax(float2 const& v1, float2 const& v2)
    {
        return float2(std::max(v1.x, v2.x), std::max(v1.y, v2.y));
    }
}

#endif // FLOAT2_H