public void A_ray_misses_a_CSG_object()
{
var csg = new CsgShape(CsgOperation.Union, new Sphere(), new Cube());
var ray = new Ray(new Point(0, 2, -5), new Vector(0, 0, 1));
var intersections = csg.LocalIntersect(ray);
intersections.Should().BeEmpty();
}
public void A_ray_hits_a_CSG_object()
{
var left = new Sphere();
var right = new Sphere(transform: Matrix4x4.CreateTranslation(0, 0, 0.5));
var csg = new CsgShape(CsgOperation.Union, left, right);
var ray = new Ray(new Point(0, 0, -5), new Vector(0, 0, 1));
var intersections = csg.LocalIntersect(ray);
intersections.Should().HaveCount(2);
intersections.Ts.Should().ContainInOrder(4, 6.5);
intersections.Shapes.Should().ContainInOrder(left, right);
}