#ifndef MATRIX_H_INCLUDED #define MATRIX_H_INCLUDED #include "vec2d.h" class matrix { public: vec2d b1, b2; }; inline vec2d operator*(matrix m, vec2d v) { return vec2d{v.x * m.b1.x + v.y * m.b2.x, v.x * m.b1.y + v.y * m.b2.y}; } #endif