2D geometrical elements and operations


xieite::intersection2d()
xieite::is_linear2d<>
xieite::line2d {}
xieite::point2d {}
xieite::polygon2d {}
xieite::ray2d {}
xieite::reflect2d()
xieite::rotate2d()
xieite::scale2d()
xieite::segment2d {}
xieite::translate2d()