GMatrix2D.h

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#pragma once
 
namespace RE
{
    class GMatrix2D
    {
    public:
        GMatrix2D()
        {
            SetIdentity();
        }
 
        GMatrix2D(float a_v0, float a_v1, float a_v2, float a_v3, float a_v4, float a_v5)
        {
            SetMatrix(a_v0, a_v1, a_v2, a_v3, a_v4, a_v5);
        }
 
        GMatrix2D& operator=(const GMatrix2D& a_rhs)
        {
            for (std::size_t i = 0; i < std::extent<decltype(data), 0>::value; ++i) {
                for (std::size_t j = 0; j < std::extent<decltype(data), 1>::value; ++j) {
                    data[i][j] = a_rhs.data[i][j];
                }
            }
            return *this;
        }
 
        inline void SetMatrix(const GMatrix2D& a_matrix)
        {
            data[0][0] = a_matrix.data[0][0];
            data[0][1] = a_matrix.data[0][1];
            data[0][2] = a_matrix.data[0][2];
            data[1][0] = a_matrix.data[1][0];
            data[1][1] = a_matrix.data[1][1];
            data[1][2] = a_matrix.data[1][2];
        }
 
        inline void SetMatrix(float a_v0, float a_v1, float a_v2, float a_v3, float a_v4, float a_v5)
        {
            data[0][0] = a_v0;
            data[0][1] = a_v1;
            data[0][2] = a_v4;
            data[1][0] = a_v2;
            data[1][1] = a_v3;
            data[1][2] = a_v5;
        }
 
        void SetIdentity()
        {
            data[0][0] = 1.0f;
            data[0][1] = 0.0f;
            data[0][2] = 0.0f;
            data[1][0] = 0.0f;
            data[1][1] = 1.0f;
            data[1][2] = 0.0f;
        }
 
        float data[2][3];  // 00
    };
    static_assert(sizeof(GMatrix2D) == 0x18);
}