public void RefractedColor()
{
var world = new DefaultWorld();
var sphereA = world.Shapes[0];
sphereA.Material.Ambient = 1;
sphereA.Material.Pattern = new TestPattern();
var sphereB = world.Shapes[1];
sphereB.Material.Transparency = 1;
sphereB.Material.RefractiveIndex = 1.5f;
var ray = new Ray(new Point(0, 0, 0.1f), Vector.UnitY);
var intersections = new Intersections(
new Intersection(-0.9899f, sphereA),
new Intersection(-0.4899f, sphereB),
new Intersection(0.4899f, sphereB),
new Intersection(0.9899f, sphereA));
var info = new IntersectionInfo(intersections, intersections[2], ray);
var actual = world.RefractedColor(info, 5);
Assert.Equal(new Color(0, 0.9978715f, 0.047472f), actual);
}
public void RefractedColorOpaqueSurface()
{
var world = new DefaultWorld();
var sphere = world.Shapes[0];
var ray = new Ray(new Point(0, 0, -5), Vector.UnitZ);
var intersections = new Intersections(new Intersection(4, sphere), new Intersection(6, sphere));
var info = new IntersectionInfo(intersections, intersections[0], ray);
var actual = world.RefractedColor(info, 5);
Assert.Equal(Color.Black, actual);
}
public void RefractedColorTotalInternalReflection()
{
var world = new DefaultWorld();
var sphere = world.Shapes[0];
sphere.Material.Transparency = 1;
sphere.Material.RefractiveIndex = 1.5f;
var ray = new Ray(new Point(0, 0, MathF.Sqrt(2) / 2), Vector.UnitY);
var intersections = new Intersections(new Intersection(-MathF.Sqrt(2) / 2, sphere), new Intersection(MathF.Sqrt(2) / 2, sphere));
var info = new IntersectionInfo(intersections, intersections[1], ray);
var actual = world.RefractedColor(info, 5);
Assert.Equal(Color.Black, actual);
}
public void RefractedColorMaxRecursiveDepth()
{
var world = new DefaultWorld();
var sphere = world.Shapes[0];
sphere.Material.Transparency = 1;
sphere.Material.RefractiveIndex = 1.5f;
var ray = new Ray(new Point(0, 0, -5), Vector.UnitZ);
var intersections = new Intersections(new Intersection(4, sphere), new Intersection(6, sphere));
var info = new IntersectionInfo(intersections, intersections[0], ray);
var actual = world.RefractedColor(info, 0);
Assert.Equal(Color.Black, actual);
}