public static extern void matrix4_rotate_aa(out matrix4 dst, out matrix4 m, out axisang aa);
public static extern void matrix3_rotate_aa(out matrix3 dst, out matrix3 m, out axisang aa);
public static extern void gs_matrix_rotaa(out axisang rot);
public static extern void matrix3_from_axisang(out matrix3 dst, out axisang aa);