public void RayProjectionToPlaneTest()
{
Plane3d s = new Plane3d(0, 0, 1, 0);
Ray3d r = new Ray3d(new Point3d(1, 1, 1), new Vector3d(1, 1, 1));
Assert.IsTrue((Ray3d)r.ProjectionTo(s) == new Ray3d(new Point3d(1, 1, 0), new Vector3d(1, 1, 0)));
}
