void Viewport(int width, int height);
void Viewport(int x, int y, int width, int height);
void Viewport(int width, int height);
void Viewport(int x, int y, int width, int height);
void Clip(float near, float far);
const glm::mat4 &Projection() { return projection; }
void Clip(float near, float far);
const glm::mat4 &Projection() { return projection; }