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TMat2

This template represents 2x2 matrix. It uses row major order of data.

You can find more information in comments below.

template<class TYPE>
union TMat2
{
    struct
    {
        TYPE _11, _12; // First row
        TYPE _21, _22; // Second row
    };
    TVec2<TYPE> Rows[2]; // Rows as vectors
    TYPE Data[4]; // Elements as array
    TMatrix<TYPE, 2, 2> M; // As TMatrix

    TMat2() = default;
    TMat2(const TMat2 &other) = default;
    TMat2(TMat2 &&other) = default;

    // Create with specified elements
    TMat2(
        const TYPE m11, const TYPE m12,
        const TYPE m21, const TYPE m22);

    // Create with specified rows
    TMat2(const TVec2<TYPE> &row1, const TVec2<TYPE> &row2);

    // Create diagonal matrix
    TMat2(const TYPE diagonal, const TYPE other);

    // Create from TMatrix
    TMat2(const TMatrix<TYPE, 2, 2> &m);

    TMat2 &operator=(const TMat2 &other) = default;
    TMat2 &operator=(TMat2 &&other) = default;

    TVec2<TYPE> operator[](const size_t row) const; // Return specified row. Used when matrix is a constant

    TVec2<TYPE> &operator[](const size_t row); // Return specified row
};

Additionally following operators exists.

template<class TYPE>
bool operator==(const TMat2<TYPE> &a, const TMat2<TYPE> &b); // Check whether matrices are equal. Can be used for non-float data types only
template<class TYPE>
bool operator!=(const TMat2<TYPE> &a, const TMat2<TYPE> &b); // Check whether matrices aren't equal. Can be used for non-float data types only
template<class TYPE>
TMat2<TYPE> operator+(const TMat2<TYPE> &m, const TYPE val); // Add matrix and scalar
template<class TYPE>
TMat2<TYPE> operator-(const TMat2<TYPE> &m, const TYPE val); // Subtruct matrix and scalar
template<class TYPE>
TMat2<TYPE> operator*(const TMat2<TYPE> &m, const TYPE val); // Multiply matrix and scalar
template<class TYPE>
TMat2<TYPE> operator/(const TMat2<TYPE> &m, const TYPE val); // Divide matrix and scalar
template<class TYPE>
TMat2<TYPE> operator+(const TYPE val, const TMat2<TYPE> &m); // Add scalar and matrix
template<class TYPE>
TMat2<TYPE> operator-(const TYPE val, const TMat2<TYPE> &m); // Subtruct scalar and matrix
template<class TYPE>
TMat2<TYPE> operator*(const TYPE val, const TMat2<TYPE> &m); // Multiply scalar and matrix
template<class TYPE>
TMat2<TYPE> operator/(const TYPE val, const TMat2<TYPE> &m); // Divide scalar and matrix
template<class TYPE>
TMat2<TYPE> &operator+=(TMat2<TYPE> &m, const TYPE val); // Add scalar to matrix
template<class TYPE>
TMat2<TYPE> &operator-=(TMat2<TYPE> &m, const TYPE val); // Subtract scalar from matrix
template<class TYPE>
TMat2<TYPE> &operator*=(TMat2<TYPE> &m, const TYPE val); // Multiply matrix by scalar
template<class TYPE>
TMat2<TYPE> &operator/=(TMat2<TYPE> &m, const TYPE val); // Divide matrix by scalar
template<class TYPE>
TVec2<TYPE> operator*(const TVec2<TYPE> &v, const TMat2<TYPE> &m); // Multiply vector and matrix
template<class TYPE>
TVec2<TYPE> operator*(const TMat2<TYPE> &m, const TVec2<TYPE> &v); // Multiply matrix and vector
template<class TYPE>
TVec2<TYPE> &operator*=(TVec2<TYPE> &v, const TMat2<TYPE> &m); // Multiply vector by matrix
template<class TYPE>
TMat2<TYPE> operator*(const TMat2<TYPE> &a, const TMat2<TYPE> &b); // Multiply matrices
template<class TYPE>
TMat2<TYPE> &operator*=(TMat2<TYPE> &a, const TMat2<TYPE> &b); // Multiply matrix by matrix

Also there are some functions which can be used with TMat2 template. Here they are.

Namespace: ntl
Include: NTL/Core/Mat2.h