public void ShadeWithReflectiveTransparentMaterial()
{
var w = new DefaultWorld();
var r = new Ray(
Vector4.CreatePosition(0, 0, -3),
Vector4.CreateDirection(0, -Math.Sqrt(2) / 2, Math.Sqrt(2) / 2));
var floor = new Plane();
floor.Transform = Transform.Translate(0, -1, 0);
floor.Material.Reflective = 0.5;
floor.Material.Transparency = 0.5;
floor.Material.RefractiveIndex = 1.5;
var ball = new Sphere();
ball.Transform = Transform.Translate(0, -3.5, -0.5);
ball.Material.Color = new Color(1, 0, 0);
ball.Material.Ambient = 0.5;
w.Objects.Add(floor);
w.Objects.Add(ball);
var xs = IntersectionList.Create(
new Intersection(Math.Sqrt(2), floor));
var comps = xs[0].Precompute(r, xs);
var c = w.Render(comps, 5);
var expected = new Color(0.93391, 0.69643, 0.69243);
const double eps = 0.00001;
var comparer = Color.GetEqualityComparer(eps);
Assert.Equal(expected, c, comparer);
}
public void TestShadingAnIntersection()
{
var w = new DefaultWorld();
var r = new Ray(Vector4.CreatePosition(0, 0, -5), Vector4.CreateDirection(0, 0, 1));
var shape = w.Objects[0];
var i = new Intersection(4, shape);
var comps = i.Precompute(r);
var c = w.Render(comps, 5);
var expected = new Color(0.38066, 0.47583, 0.2855);
const double eps = 0.00001;
var comparer = Color.GetEqualityComparer(eps);
Assert.Equal(expected, c, comparer);
}
public void TestShadingAnIntersectionFromTheInside()
{
var w = new DefaultWorld();
w.Lights.Clear();
w.Lights.Add(new PointLight(Vector4.CreatePosition(0, 0.25, 0), Color.White));
var r = new Ray(Vector4.CreatePosition(0, 0, 0), Vector4.CreateDirection(0, 0, 1));
var shape = w.Objects[1];
var i = new Intersection(0.5, shape);
var comps = i.Precompute(r);
var c = w.Render(comps, 5);
var expected = new Color(0.90498, 0.90498, 0.90498);
const double eps = 0.00001;
var comparer = Color.GetEqualityComparer(eps);
Assert.Equal(expected, c, comparer);
}
public void ShadeWithReflectiveMaterial()
{
var w = new DefaultWorld();
var plane = new Plane();
plane.Material.Reflective = 0.5;
plane.Transform = Transform.Translate(0, -1, 0);
w.Objects.Add(plane);
var r = new Ray(
Vector4.CreatePosition(0, 0, -3),
Vector4.CreateDirection(0, -Math.Sqrt(2) / 2, Math.Sqrt(2) / 2));
var i = new Intersection(Math.Sqrt(2), plane);
var comps = i.Precompute(r);
var c = w.Render(comps, 5);
var expected = new Color(0.87677, 0.92436, 0.82918);
const double eps = 0.0001;
var comparer = Color.GetEqualityComparer(eps);
Assert.Equal(expected, c, comparer);
}