public static void FillRectangle <TVertexParameters>(this IShapeDrawer2 <TVertexParameters> drawer,
                                                      Vector2 xy, Vector2 wh, TVertexParameters parameters)
 {
     drawer.FillRectangle(xy.X, xy.Y, 0, wh.X, wh.Y, parameters);
 }
 public static void FillRectangle <TVertexParameters>(this IShapeDrawer2 <TVertexParameters> drawer,
                                                      float x, float y, float w, float h, TVertexParameters parameters)
 {
     drawer.FillRectangle(x, y, 0, w, h, parameters);
 }