public static SceneDescription SpheresReflection(float roughness = 0.01f)
{
var primitives = new List <Primitive>()
{
new GeometricPrimitive(new Sphere(Transform.Identity, 0.5f), new PlasticMaterial(new Spectrum(1), new Spectrum(1), roughness)),
new GeometricPrimitive(new Sphere(Transform.Translate(1, 0, 0), 0.25f), new MatteMaterial(new Spectrum(1, 0, 0), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(-1, 0, 0), 0.25f), new MatteMaterial(new Spectrum(0, 1, 0), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(0, 0.75f, 0), 0.25f), new MatteMaterial(new Spectrum(0, 0, 10), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(0, -1, 0), 0.25f), new MatteMaterial(new Spectrum(1, 1, 0), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(-0.7f, 0.7f, 0), 0.25f), new MirrorMaterial(new Spectrum(1))),
new GeometricPrimitive(new Sphere(Transform.Translate(0.7f, 0.7f, 0), 0.25f), new MirrorMaterial(new Spectrum(1))),
new GeometricPrimitive(new Sphere(Transform.Translate(-0.7f, -0.7f, 0), 0.25f), new MirrorMaterial(new Spectrum(1))),
new GeometricPrimitive(new Sphere(Transform.Translate(0.7f, -0.7f, 0), 0.25f), new MirrorMaterial(new Spectrum(1))),
};
var lights = new List <Light>()
{
new PointLight(Transform.Translate(1, 1, -5), new Spectrum(25)),
new PointLight(Transform.Translate(-3, -3, 3), new Spectrum(10)),
};
return(new SceneDescription(new PrimitiveList(primitives), lights, OrthographicCamera.Create(new Point3 <float>(0, 0, -5))));
}
public static SceneDescription AreaLight(bool secondLight)
{
var lightTransform = Transform.LookAt(new Point3 <float>(0.5f, 0.75f, -0.5f), new Point3 <float>(0, 0, 0), new Vector3 <float>(0, 1, 0)).Inverse();
var lightShape = new Disk(lightTransform, 0.75f);
var light = new DiffuseAreaLight(lightTransform, new Spectrum(5), lightShape, 1, true);
var lightTransform2 = Transform.LookAt(new Point3 <float>(-1, -1.5f, -1f), new Point3 <float>(0, 0, 0), new Vector3 <float>(0, 1, 0)).Inverse();
var lightShape2 = new Disk(lightTransform2, 3);
var light2 = new DiffuseAreaLight(lightTransform2, new Spectrum(1, 0.07f, 0.57f), lightShape2, 1, true);
var primitives = new List <Primitive>()
{
new GeometricPrimitive(new Sphere(Transform.Translate(0, 0, 0), 0.5f), new MatteMaterial(new Spectrum(1), 0)),
//new GeometricPrimitive(new Disk(Transform.Translate(0, -1f, 0), 2), new MatteMaterial(new Spectrum(1), 0)),
new GeometricPrimitive(lightShape, new MatteMaterial(new Spectrum(1), 0), light)
};
if (secondLight)
{
primitives.Add(new GeometricPrimitive(lightShape2, new MatteMaterial(new Spectrum(1), 0), light2));
}
var lights = new List <Light>()
{
light
};
if (secondLight)
{
lights.Add(light2);
}
return(new SceneDescription(new PrimitiveList(primitives), lights, OrthographicCamera.Create(new Point3 <float>(0, 0, -5))));
}
public static SceneDescription ManySpheres()
{
var primitives = new List <Primitive>();
for (var i = 0; i < 200; ++i)
{
var spectrum = new Spectrum(Random.Shared.NextSingle(), Random.Shared.NextSingle(), Random.Shared.NextSingle());
Material material;
if (Random.Shared.NextSingle() > 0.7)
{
material = new MirrorMaterial(spectrum);
}
else
{
//material = new MatteMaterial(spectrum, 0);
material = new PlasticMaterial(spectrum, new Spectrum(1), Random.Shared.NextSingle());
}
var transform = Transform.Translate(Random.Shared.NextSingle() * 2 - 1, Random.Shared.NextSingle() * 2 - 1, Random.Shared.NextSingle() * 2 - 1);
var radius = 0.1f + Random.Shared.NextSingle() * 0.1f;
primitives.Add(new GeometricPrimitive(new Sphere(transform, radius), material));
}
var lights = new List <Light>();
for (var i = 0; i < 5; ++i)
{
var transform = Transform.Translate(Random.Shared.NextSingle() * 2 - 1, Random.Shared.NextSingle() * 2 - 1, Random.Shared.NextSingle() * -3 - 5);
var spectrum = new Spectrum(Random.Shared.NextSingle() * 25 + 15);
lights.Add(new PointLight(transform, spectrum));
}
return(new SceneDescription(new PrimitiveList(primitives), lights, OrthographicCamera.Create(new Point3 <float>(0, 0, -5))));
}