void set_frustum_axis(float, float);
void set_frustum_rotation(const Geometry::Angle<float> &);
const Geometry::Angle<float> &get_field_of_view() const { return fov; }
void set_frustum_axis(float, float);
void set_frustum_rotation(const Geometry::Angle<float> &);
const Geometry::Angle<float> &get_field_of_view() const { return fov; }