public static IEnumerable <Point2D> PlotLine2D(this IPoint2D start, IPoint2D end)
{
return(Line2D.Plot(start, end));
}
public static IEnumerable <Point2D> Intersect(Triangle2D t1, Triangle2D t2)
{
return(Line2D.Intersect(new[] { t1._AB, t1._BC, t1._CA }, new[] { t2._AB, t2._BC, t2._CA }));
}