public static void ReverseClockDirection(this VertexStore src, VertexStore outputVxs)
{
//temp fix for reverse clock direction
Q1RectD bounds = src.GetBoundingRect();
double centerX = (bounds.Left + bounds.Width) / 2;
double centerY = (bounds.Top + bounds.Height) / 2;
//Affine aff = Affine.New(AffinePlan.Translate(-centerX, -centerY),
// AffinePlan.Scale(1, -1),//flipY,
// AffinePlan.Translate(centerX, centerY));
AffineMat aff = AffineMat.Iden();
aff.Translate(-centerX, -centerY);
aff.Translate(1, -1);//flipY
aff.Translate(centerX, centerY);
aff.TransformToVxs(src, outputVxs);
}