public void EdgeOrientPointOnFringe()
{
var e1 = new EdgeEx(new PointF(0, 0), new PointF(2, 0));
var e2 = new EdgeEx(new PointF(2, 0), new PointF(0, 2));
var e3 = new EdgeEx(new PointF(0, 2), new PointF(0, 0));
Assert.IsTrue(Math.Abs(e1.Orient(new PointF(1, 0))) < float.Epsilon);
Assert.IsTrue(Math.Abs(e3.Orient(new PointF(0, 1))) < float.Epsilon);
}
public void EdgeOrientPointOutside()
{
var e1 = new EdgeEx(new PointF(0, 0), new PointF(2, 0));
var e2 = new EdgeEx(new PointF(2, 0), new PointF(0, 2));
var e3 = new EdgeEx(new PointF(0, 2), new PointF(0, 0));
Assert.IsTrue(e1.Orient(new PointF(1, -1)) < 0);
Assert.IsTrue(e2.Orient(new PointF(3, 3)) < 0);
Assert.IsTrue(e3.Orient(new PointF(-1, 1)) < 0);
}
public void EdgeOrientPointInside()
{
var e1 = new EdgeEx(new PointF(0, 0), new PointF(2, 0));
var e2 = new EdgeEx(new PointF(2, 0), new PointF(0, 2));
var e3 = new EdgeEx(new PointF(0, 2), new PointF(0, 0));
var p = new PointF(0.5f, 0.5f);
Assert.IsTrue(e1.Orient(p) > 0);
Assert.IsTrue(e2.Orient(p) > 0);
Assert.IsTrue(e3.Orient(p) > 0);
}