public void TestIntersectionInShade()
{
var world = new World();
world.Light = new PointLight(Tuple.Point(0, 0, -10), new Color(1, 1, 1));
world.Shapes.Add(new Sphere());
world.Shapes.Add(new Sphere
{
Transform = Matrix4.Translation(0, 0, 10)
});
var s2 = new Sphere
{
Transform = Matrix4.Translation(0, 0, 10)
};
world.Shapes.Add(s2);
var ray = new Ray(Tuple.Point(0, 0, 5), Tuple.Vector(0, 0, 1));
var i = new Intersection(4, s2);
var comp = Computation.Prepare(i, ray);
var color = LightUtil.ShadeHit(world, comp);
Assert.AreEqual(new Color(0.1, 0.1, 0.1), color);
}
public void TestShadeIntersection()
{
var world = WorldBuilder.DefaultWorld();
var ray = new Ray(Tuple.Point(0, 0, -5), Tuple.Vector(0, 0, 1));
var sphere = world.Shapes[0];
var i = new Intersection(4, sphere);
var comp = Computation.Prepare(i, ray);
var color = LightUtil.ShadeHit(world, comp);
Assert.AreEqual(new Color(0.38066, 0.47583, 0.2855), color);
}
public Color ColorAt(Ray ray, int remaining = 5)
{
var intersections = Intersect(ray);
var hit = intersections.Hit();
if (hit is null)
{
return(new Color(0, 0, 0));
}
var comps = Computation.Prepare(hit, ray, intersections);
return(LightUtil.ShadeHit(this, comps, remaining));
}
public void TestShadeIntersectionInside()
{
var world = WorldBuilder.DefaultWorld();
world.Light = new PointLight(Tuple.Point(0, 0.25, 0), new Color(1, 1, 1));
var ray = new Ray(Tuple.Point(0, 0, 0), Tuple.Vector(0, 0, 1));
var sphere = world.Shapes[1];
var i = new Intersection(0.5, sphere);
var comp = Computation.Prepare(i, ray);
var color = LightUtil.ShadeHit(world, comp);
Assert.AreEqual(new Color(0.90498, 0.90498, 0.90498), color);
}
public void TestShadeHitOnReflectiveShape()
{
var world = WorldBuilder.DefaultWorld();
var plane = new Plane
{
Transform = Matrix4.Translation(0, -1, 0)
};
plane.Material.Reflective = 0.5;
world.Shapes.Add(plane);
var ray = new Ray(Tuple.Point(0, 0, -3), Tuple.Vector(0, -0.5 * System.Math.Sqrt(2), 0.5 * System.Math.Sqrt(2)));
var i = new Intersection(System.Math.Sqrt(2), plane);
var comp = Computation.Prepare(i, ray);
var col = LightUtil.ShadeHit(world, comp);
Assert.AreEqual(new Color(0.876757, 0.924340, 0.829174), col);
}
public void TestRefractShadeHit()
{
var world = WorldBuilder.DefaultWorld();
var floor = new Plane
{
Transform = Matrix4.Translation(0, -1, 0),
Material = new Material
{
Reflective = 0.5,
Transparency = 0.5,
RefractiveIndex = 1.5
}
};
var ball = new Sphere
{
Transform = Matrix4.Translation(0, -3.5, -0.5),
Material = new Material
{
Color = new Color(1, 0, 0),
Ambient = 0.5
}
};
world.Shapes.Add(floor);
world.Shapes.Add(ball);
var ray = new Ray(Tuple.Point(0, 0, -3), Tuple.Vector(0, -0.5 * System.Math.Sqrt(2), 0.5 * System.Math.Sqrt(2)));
var xs = new Intersections
{
new Intersection(System.Math.Sqrt(2), floor),
};
var comps = Computation.Prepare(xs[0], ray, xs);
var color = LightUtil.ShadeHit(world, comps, 5);
Assert.AreEqual(new Color(0.93391, 0.69643, 0.69243), color);
//Assert.AreEqual(new Color(0.93642, 0.68642, 0.68642), color);
}