public void RayMissesCSG()
{
CSG c = new CSG("union", new Sphere(), new Cube());
Ray r = new Ray(Tuple.Point(0, 2, -5), Tuple.Vector(0, 0, 1));
List <Intersection> xs = c.LocalIntersect(r);
Assert.AreEqual(xs.Count, 0);
}
public void RayHitsCSG()
{
Shape s1 = new Sphere();
Shape s2 = new Sphere();
s2.Transform = new Translate(0, 0, 0.5).GetTransform();
CSG c = new CSG("union", s1, s2);
Ray r = new Ray(Tuple.Point(0, 0, -5), Tuple.Vector(0, 0, 1));
List <Intersection> xs = c.LocalIntersect(r);
Assert.AreEqual(xs.Count, 2);
Assert.IsTrue(Globals.EqualityOfDouble(xs[0].T, 4));
Assert.AreEqual(xs[0].S, s1);
Assert.IsTrue(Globals.EqualityOfDouble(xs[1].T, 6.5));
Assert.AreEqual(xs[1].S, s2);
}