public void ARayMissesACSGObject()
{
var c = new CSG(Operation.UNION, new Sphere(), new Cube());
var r = new Ray(new Point(0, 2, -5), new Vector(0, 0, 1));
var xs = c.Intersects(r);
Assert.AreEqual(0, xs.Count);
}
public void IntersectingRayAndCsgTestsChildrenIfBoxIsHit()
{
var left = new TestShape();
var right = new TestShape();
var shape = new CSG(Operation.DIFFERENCE, left, right);
var r = new Ray(new Point(0, 0, -5), new Vector(0, 0, 1));
var xs = shape.Intersects(r);
Assert.IsNotNull(left.SavedRay);
Assert.IsNotNull(right.SavedRay);
}
public void ARayHitsACSGObject()
{
var s1 = new Sphere();
var s2 = new Sphere
{
Transform = Transform.Translation(0, 0, 0.5)
};
var c = new CSG(Operation.UNION, s1, s2);
var r = new Ray(new Point(0, 0, -5), new Vector(0, 0, 1));
var xs = c.Intersects(r);
Assert.AreEqual(2, xs.Count);
Assert.AreEqual(4, xs[0].T);
Assert.AreEqual(s1, xs[0].Shape);
Assert.AreEqual(6.5, xs[1].T);
Assert.AreEqual(s2, xs[1].Shape);
}