public void AddingAChildToAGroup()
{
var g = new Group();
var s = new TestShape();
g.Add(s);
Assert.AreNotEqual(0, g.Count);
Assert.IsTrue(g.Contains(s));
Assert.AreEqual(g, s.Parent);
}
public void IntersectingRayAndGroupDoesntTestChildrenIfBoxIsMissed()
{
var child = new TestShape();
var shape = new Group();
shape.Add(child);
var r = new Ray(new Point(0, 0, -5), new Vector(0, 1, 0));
var xs = shape.Intersects(r);
Assert.IsNull(child.SavedRay);
}
public void IntersectingRayGroupTestsChildrenIfBoxIsHit()
{
var child = new TestShape();
var shape = new Group();
shape.Add(child);
var r = new Ray(new Point(0, 0, -5), new Vector(0, 0, 1));
var xs = shape.Intersects(r);
Assert.IsNotNull(child.SavedRay);
}
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);
}