CWE-ou-minkata/Sources/Plasma/CoreLib/hsPoint2.h

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*==LICENSE==*/
#ifndef hsPoint2_Defined
#define hsPoint2_Defined

#include <cmath>

struct hsPolar {
    float       fRadius;
    float       fAngle;
};

struct hsPoint2 {
    float  fX, fY;

    hsPoint2& Set(float x, float y)
    {
        fX = x;
        fY = y;
        return *this;
    }
    hsPoint2& operator+=(const hsPoint2& s)
    {
        this->fX += s.fX;
        this->fY += s.fY;
        return *this;
    }
    hsPoint2& operator-=(const hsPoint2& s)
    {
        this->fX -= s.fX;
        this->fY -= s.fY;
        return *this;
    }

    int operator==(const hsPoint2& ss) const
    {
        return (ss.fX == fX && ss.fY == fY);
    }
    int operator!=(const hsPoint2& ss)
    {
        return !(ss == *this);
    }

    friend hsPoint2 operator+(const hsPoint2& s, const hsPoint2& t)
    {
        hsPoint2  result;
        result.Set(s.fX + t.fX, s.fY + t.fY);
        return result;
    }
    friend hsPoint2 operator-(const hsPoint2& s, const hsPoint2& t)
    {
        hsPoint2  result;
        result.Set(s.fX - t.fX, s.fY - t.fY);
        return result;
    }
    friend hsPoint2 operator-(const hsPoint2& s)
    {
        hsPoint2  result = { -s.fX, -s.fY };
        return result;
    }

    friend hsPoint2 operator*(const hsPoint2& s, float t)
        {
            hsPoint2   result;
            result.Set(s.fX * t, s.fY * t);
            return result;
        }
    friend hsPoint2 operator*(float t, const hsPoint2& s)
        {
            hsPoint2   result;
            result.Set(s.fX * t, s.fY * t);
            return result;
        }

    hsPoint2*  Grid(float period);
    bool       CloseEnough(const hsPoint2* p, float tolerance) const;

    float       MagnitudeSquared() const { return fX * fX + fY * fY; }
    float       Magnitude() const { return Magnitude(fX, fY); }
    hsPolar*    ToPolar(hsPolar* polar) const;

    static float    Magnitude(float x, float y) { return sqrt(x * x + y * y); }
    static float Distance(const hsPoint2& p1, const hsPoint2& p2);
    static hsPoint2    Average(const hsPoint2& a, const hsPoint2& b)
                    {
                        hsPoint2   result;
                        result.Set((a.fX + b.fX) * float(0.5), (a.fY + b.fY) * float(0.5));
                        return result;
                    }
    static float ComputeAngle(const hsPoint2& a, const hsPoint2& b, const hsPoint2& c);
};

#endif  // hsPoint2_Defined