/// <summary>
/// create lines from curve
/// </summary>
/// <param name="vxs"></param>
public static void MakeLines(this Curve3 curve, VertexStore vxs, double x1, double y1,
double cx, double cy,
double x2, double y2)
{
CreateBezierVxs3(vxs,
x1, y1,
cx, cy,
x2, y2);
}
