public void NoShadow()
{
var world = WorldBuilder.DefaultWorld();
var point = Tuple.Point(0, 10, 0);
Assert.IsFalse(ShadowUtil.IsShadowed(world, point));
}
public void ObjectBehindPoint()
{
var world = WorldBuilder.DefaultWorld();
var point = Tuple.Point(-2, 2, -2);
Assert.IsFalse(ShadowUtil.IsShadowed(world, point));
}
public void TestColorAtMiss()
{
var world = WorldBuilder.DefaultWorld();
var ray = new Ray(Tuple.Point(0, 0, -5), Tuple.Vector(0, 1, 0));
Assert.AreEqual(new Color(0, 0, 0), world.ColorAt(ray));
}
public void BehindLight()
{
var world = WorldBuilder.DefaultWorld();
var point = Tuple.Point(-20, 20, -20);
Assert.IsFalse(ShadowUtil.IsShadowed(world, point));
}
public void InShadow()
{
var world = WorldBuilder.DefaultWorld();
var point = Tuple.Point(10, -10, 10);
Assert.IsTrue(ShadowUtil.IsShadowed(world, point));
}
public void TestColorAtBehindRay()
{
var world = WorldBuilder.DefaultWorld();
world.Shapes[0].Material.Ambient = 1;
world.Shapes[1].Material.Ambient = 1;
var ray = new Ray(Tuple.Point(0, 0, 0.75), Tuple.Vector(0, 0, -1));
Assert.AreEqual(world.Shapes[1].Material.Color, world.ColorAt(ray));
}
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 void TestDefaultWorldIntersect()
{
var world = WorldBuilder.DefaultWorld();
var ray = new Ray(Tuple.Point(0, 0, -5), Tuple.Vector(0, 0, 1));
var xs = world.Intersect(ray);
Assert.AreEqual(4, xs.Count);
Assert.AreEqual(xs[0].Distance, 4.0, Epsilon);
Assert.AreEqual(xs[1].Distance, 4.5, Epsilon);
Assert.AreEqual(xs[2].Distance, 5.5, Epsilon);
Assert.AreEqual(xs[3].Distance, 6.0, Epsilon);
}
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 TestReflectOnNonReflectiveShape()
{
var world = WorldBuilder.DefaultWorld();
world.Shapes[1].Material.Ambient = 1.0;
var ray = new Ray(Tuple.Point(0, 0, 0), Tuple.Vector(0, 0, 1));
var i = new Intersection(1, world.Shapes[1]);
var comp = Computation.Prepare(i, ray);
var col = world.ReflectedColor(comp);
Assert.AreEqual(new Color(0, 0, 0), col);
}
public void TestRenderWorldWithCamera()
{
var world = WorldBuilder.DefaultWorld();
var cam = new Camera(11, 11, PI / 2)
{
Transform = Matrix4.ViewTransform(
Tuple.Point(0, 0, -5),
Tuple.Point(0, 0, 0),
Tuple.Vector(0, 1, 0))
};
Canvas image = Renderer.Render(cam, world);
Assert.AreEqual(new Color(0.38066, 0.47583, 0.2855), image.PixelAt(5, 5));
}
public void TestRefractColor()
{
var world = WorldBuilder.DefaultWorld();
var ray = new Ray(Tuple.Point(0, 0, -5), Tuple.Vector(0, 0, 1));
var xs = new Intersections
{
new Intersection(4, world.Shapes[0]),
new Intersection(6, world.Shapes[0])
};
var comps = Computation.Prepare(xs[0], ray, xs);
var col = world.RefractColor(comps, 5);
Assert.AreEqual(new Color(0, 0, 0), col);
}
public void TestDefaultWorld()
{
var world = WorldBuilder.DefaultWorld();
Assert.AreEqual(new PointLight(Tuple.Point(-10, 10, -10), new Color(1, 1, 1)), world.Light);
Assert.IsTrue(world.Shapes.Contains(new Sphere
{
Material = new Material
{
Color = new Color(0.8, 1.0, 0.6),
Diffuse = 0.7,
Specular = 0.2
}
}));
Assert.IsTrue(world.Shapes.Contains(new Sphere
{
Transform = Matrix4.Scaling(0.5, 0.5, 0.5)
}));
}
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 TestRefractColorUnderTotalInternalReflection()
{
var world = WorldBuilder.DefaultWorld();
world.Shapes[0].Material.Transparency = 1.0;
world.Shapes[0].Material.RefractiveIndex = 1.5;
var ray = new Ray(Tuple.Point(0, 0, 0.5 * System.Math.Sqrt(2)), Tuple.Vector(0, 1, 0));
var xs = new Intersections
{
new Intersection(-0.5 * System.Math.Sqrt(2), world.Shapes[0]),
new Intersection(0.5 * System.Math.Sqrt(2), world.Shapes[0])
};
var comps = Computation.Prepare(xs[1], ray, xs);
var col = world.RefractColor(comps, 5);
Assert.AreEqual(new Color(0, 0, 0), col);
}
public void TestRefractMaxDepth()
{
var world = WorldBuilder.DefaultWorld();
world.Shapes[0].Material.Transparency = 1.0;
world.Shapes[0].Material.RefractiveIndex = 1.5;
var ray = new Ray(Tuple.Point(0, 0, -5), Tuple.Vector(0, 0, 1));
var xs = new Intersections
{
new Intersection(4, world.Shapes[0]),
new Intersection(6, world.Shapes[0])
};
var comps = Computation.Prepare(xs[0], ray, xs);
var col = world.RefractColor(comps, 0);
Assert.AreEqual(new Color(0, 0, 0), col);
}
public void TestReflectMaxDepth()
{
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 = world.ReflectedColor(comp, 0);
Assert.AreEqual(new Color(0, 0, 0), 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);
}
public void TestRefractRayColor()
{
var world = WorldBuilder.DefaultWorld();
world.Shapes[0].Material.Ambient = 1.0;
world.Shapes[0].Material.Pattern = new Test_Pattern();
world.Shapes[1].Material.Transparency = 1.0;
world.Shapes[1].Material.RefractiveIndex = 1.5;
var ray = new Ray(Tuple.Point(0, 0, 0.1), Tuple.Vector(0, 1, 0));
var xs = new Intersections
{
new Intersection(-0.9899, world.Shapes[0]),
new Intersection(-0.4899, world.Shapes[1]),
new Intersection(0.4899, world.Shapes[1]),
new Intersection(0.9899, world.Shapes[0])
};
var comps = Computation.Prepare(xs[2], ray, xs);
var col = world.RefractColor(comps, 5);
Assert.AreEqual(new Color(0, 0.998884, 0.047219), col);
}