src/Vector.h

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#pragma once

#include "common.h"

// 3-Vector class
class Vector
{
public:
        Vector()
        {
                m_vfElements[0] = 0.0f;
                m_vfElements[1] = 0.0f;
                m_vfElements[2] = 0.0f;
        };

        Vector(const float fX, const float fY, const float fZ)
        {
                m_vfElements[0] = fX;
                m_vfElements[1] = fY;
                m_vfElements[2] = fZ;
        };

        Vector::Vector(const float vfValues[])
        {
                m_vfElements[0] = vfValues[0];
                m_vfElements[1] = vfValues[1];
                m_vfElements[2] = vfValues[2];
        };

        ~Vector()
        {
        };

        void Set(const float fX, const float fY, const float fZ)
        {
                m_vfElements[0] = fX;
                m_vfElements[1] = fY;
                m_vfElements[2] = fZ;
        };

        void SetX(const float fX)
        {
                m_vfElements[0] = fX;
        };

        void SetY(const float fY)
        {
                m_vfElements[1] = fY;
        };

        void SetZ(const float fZ)
        {
                m_vfElements[2] = fZ;
        };

        const float * Get() const
        {
                return m_vfElements;
        };

        const float Get(const unsigned int uIndex) const
        {
                return m_vfElements[uIndex];
        };

        const float GetX() const
        {
                return m_vfElements[0];
        };

        const float GetY() const
        {
                return m_vfElements[1];
        };

        const float GetZ() const
        {
                return m_vfElements[2];
        };

        const float GetMagnitude() const
        {
                return sqrtf(GetX()*GetX() + GetY()*GetY() + GetZ()*GetZ());
        };

        const float GetSquaredMagnitude() const
        {
                return (GetX()*GetX() + GetY()*GetY() + GetZ()*GetZ());
        };

        const float GetDot(const Vector &vecOther) const
        {
                return (GetX() * vecOther.GetX() + GetY()*vecOther.GetY() + GetZ()*vecOther.GetZ());
        };

        const Vector GetCross(const Vector &vecOther) const
        {
                return Vector(GetY()*vecOther.GetZ() - GetZ()*vecOther.GetY(), GetZ()*vecOther.GetX() - GetX() * vecOther.GetZ(), GetX()*vecOther.GetY() - GetY()*vecOther.GetX()); 
        };

        const Vector GetNormalized() const
        {
                Vector vecNew = *this;
                float fMagnitude = vecNew.GetMagnitude();

                if (fMagnitude > 0.0f)
                        vecNew /= fMagnitude;

                return vecNew;
        };

        const Vector GetInverse() const
        {
                return Vector(1.0f/GetX(),1.0f/GetY(),1.0f/GetZ());
        };

        void normalize()
        {
                (*this) = GetNormalized();
        };

        void invert()
        {
                (*this) = GetInverse();
        };

        const bool operator==(const Vector & vecOther) const
        {
                return (GetX() == vecOther.GetX()) && (GetY() == vecOther.GetY()) && (GetZ() == vecOther.GetZ());
        };

        const bool operator!=(const Vector & vecOther) const
        {
                return !(*this == vecOther);
        };

        float & operator[](const unsigned int uIndex)
        {
                return m_vfElements[uIndex];
        };

        const float operator[](const unsigned int uIndex) const
        {
                return m_vfElements[uIndex];
        };

        const Vector & operator+=(const Vector & vecOther)
        {
                SetX(GetX()+vecOther.GetX());
                SetY(GetY()+vecOther.GetY());
                SetZ(GetZ()+vecOther.GetZ());
                return *this;
        };

        const Vector & operator-=(const Vector & vecOther)
        {
                SetX(GetX()-vecOther.GetX());
                SetY(GetY()-vecOther.GetY());
                SetZ(GetZ()-vecOther.GetZ());
                return *this;
        };

        const Vector & operator*=(const Vector & vecOther)
        {
                SetX(GetX()*vecOther.GetX());
                SetY(GetY()*vecOther.GetY());
                SetZ(GetZ()*vecOther.GetZ());
                return *this;
        };

        const Vector & operator*=(const float & fOther)
        {
                SetX(GetX()*fOther);
                SetY(GetY()*fOther);
                SetZ(GetZ()*fOther);
                return *this;
        };

        const Vector & operator/=(const Vector & vecOther)
        {
                SetX(GetX()/vecOther.GetX());
                SetY(GetY()/vecOther.GetY());
                SetZ(GetZ()/vecOther.GetZ());
                return *this;
        };

        const Vector & operator/=(const float & fOther)
        {
                SetX(GetX()/fOther);
                SetY(GetY()/fOther);
                SetZ(GetZ()/fOther);
                return *this;
        };

        const Vector operator+(const Vector & vecOther) const
        {
                Vector vecNew = *this;
                vecNew += vecOther;
                return vecNew;
        };

        const Vector operator-(const Vector & vecOther) const
        {
                Vector vecNew = *this;
                vecNew -= vecOther;
                return vecNew;
        };

        const Vector operator*(const Vector & vecOther) const
        {
                Vector vecNew = *this;
                vecNew *= vecOther;
                return vecNew;
        };

        const Vector operator*(const float & fOther) const
        {
                Vector vecNew = *this;
                vecNew *= fOther;
                return vecNew;
        };

        const Vector operator/(const Vector & vecOther) const
        {
                Vector vecNew = *this;
                vecNew /= vecOther;
                return vecNew;
        };

        const Vector operator/(const float & fOther) const
        {
                Vector vecNew = *this;
                vecNew /= fOther;
                return vecNew;
        };

        const Vector operator-() const
        {
                return Vector(-GetX(),-GetY(),-GetZ());
        };

private:
        float m_vfElements[3];
};

inline std::ostream & operator<< (std::ostream & os, const Vector & vecVector)
{
        os << "(" << vecVector.GetX() << ";" << vecVector.GetY() << ";" << vecVector.GetZ() << ")";
        return os;
}

inline std::istream & operator>> (std::istream & is, Vector & vecVector)
{

        float fX,fY,fZ;
        if (is >> eat("(") >> fX >> eat(";") >> fY >> eat(";") >> fZ >> eat(")"))
                vecVector.Set(fX,fY,fZ);

        return is;
}

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