private static void TestCase04()
{
// ShadeHit() with a reflective, transparent material
World w = new DefaultWorld();
Ray r = new Ray(Tuple.Point(0, 0, -3), Tuple.Vector(0, -Sqrt(2) / 2, Sqrt(2) / 2));
Shape floor = new Plane();
floor.Transform = Transformation.Translation(0, -1, 0);
floor.Material.Reflective = 0.5f;
floor.Material.Transparency = 0.5f;
floor.Material.RefractiveIndex = 1.5f;
w.Shapes.Add(floor);
Shape ball = new Sphere();
ball.Material.Color = Tuple.Color(1, 0, 0);
ball.Material.Ambient = 0.5f;
ball.Transform = Transformation.Translation(0, -3.5f, -0.5f);
w.Shapes.Add(ball);
List <Intersection> xs = Intersection.Aggregate(new Intersection(Sqrt(2), floor));
Computation comps = new Computation(xs[0], r, xs);
LightingModel l = new PhongReflection();
Tuple color = l.ShadeHit(w, comps, 5);
Assert.Equal(Tuple.Color(0.93391f, 0.69643f, 0.69243f), color);
}
private static void TestCase04()
{
World w = new DefaultWorld();
Ray r = new Ray(Tuple.Point(0, 0, -5), Tuple.Vector(0, 0, 1));
Shape shape = w.Shapes[0];
Intersection i = new Intersection(4, shape);
Computation comps = new Computation(i, r);
LightingModel phong = new PhongReflection();
Tuple c = phong.ShadeHit(w, comps);
Assert.Equal(Tuple.Color(0.38066f, 0.47583f, 0.2855f), c);
}
private static void TestCase05()
{
// ShadeHit() with a reflective material
World w = new DefaultWorld();
Shape shape = new Plane();
shape.Material.Reflective = 0.5f;
shape.Transform = Transformation.Translation(0, -1, 0);
w.Shapes.Add(shape);
Ray r = new Ray(Tuple.Point(0, 0, -3), Tuple.Vector(0, -Sqrt(2) / 2, Sqrt(2) / 2));
Intersection i = new Intersection(Sqrt(2), shape);
Computation comps = new Computation(i, r);
LightingModel l = new PhongReflection();
Tuple color = l.ShadeHit(w, comps);
Assert.Equal(Tuple.Color(0.87677f, 0.92436f, 0.82918f), color);
}
private static void TestCase06()
{
World w = new World();
w.Lights.Add(new PointLight(Tuple.Point(0, 0, -10), Tuple.Color(1, 1, 1)));
Shape s1 = new Sphere();
w.Shapes.Add(s1);
Shape s2 = new Sphere();
s2.Transform = Transformation.Translation(0, 0, 10);
w.Shapes.Add(s2);
Ray r = new Ray(Tuple.Point(0, 0, 5), Tuple.Vector(0, 0, 1));
Intersection i = new Intersection(4, s2);
Computation comps = new Computation(i, r);
PhongReflection phong = new PhongReflection();
Tuple c = phong.ShadeHit(w, comps);
Assert.Equal(Tuple.Color(0.1f, 0.1f, 0.1f), c);
}