public static SceneDescription IndirectLight()
{
// Single light source at the top
var lights = new List <Light>()
{
new PointLight(Transform.Translate(0, 5, 0), new Spectrum(100))
};
var primitives = new List <Primitive>()
{
// Small object that should only receive indirect light
// bouncing from the two side objects
new GeometricPrimitive(new Sphere(Transform.Translate(0, -1.5f, 0), 0.5f), new PlasticMaterial(new Spectrum(10), new Spectrum(10), 0.01f)),
// Big object between the light source and the small object
new GeometricPrimitive(new Sphere(Transform.Identity, 1.0f), new PlasticMaterial(new Spectrum(1), new Spectrum(1), 0.1f)),
// Side objects to reflect the light
new GeometricPrimitive(new Sphere(Transform.Translate(-10, 0, 0), 6), new MatteMaterial(new Spectrum(1, 0, 0), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(10, 0, 0), 6), new MatteMaterial(new Spectrum(0, 1, 0), 0)),
};
var camera = PerspectiveCamera.Create(new Point3 <float>(0, 0, -5), 100);
return(new SceneDescription(new PrimitiveList(primitives), lights, camera));
}
public static SceneDescription SpheresRoughness()
{
float[] roughnesses = { 0.001f, 0.01f, 0.05f, 0.1f, 0.2f, 0.4f, 0.8f };
Spectrum[] colors = { new Spectrum(1, 0, 0), new Spectrum(0, 1, 0), new Spectrum(0, 0, 1) };
var primitives = new List <Primitive>();
for (var z = -1; z < 2; ++z)
{
for (var x = -3; x < 4; ++x)
{
var material = new PlasticMaterial(colors[z + 1], new Spectrum(1), roughnesses[x + 3]);
primitives.Add(new GeometricPrimitive(new Sphere(Transform.Translate(x, 0, z), 0.25f), material));
}
}
var lights = new List <Light>()
{
new PointLight(Transform.Translate(0, 10, -3), new Spectrum(100)),
new PointLight(Transform.Translate(-5, -5, 0), new Spectrum(50))
};
//var camera = OrthographicCamera.Create(new Point3<float>(0, 3, -5), 8);
var camera = PerspectiveCamera.Create(new Point3 <float>(0, 3, -4), 100);
return(new SceneDescription(new PrimitiveList(primitives), lights, camera));
}
public static Camera MakeCamera(
string name,
ParamSet paramSet,
TransformSet cam2worldSet,
double transformStart,
double transformEnd,
Film film)
{
Camera camera = null;
MediumInterface mediumInterface = new MediumInterface(); // todo: implement graphicsState graphicsState.CreateMediumInterface();
//static_assert(MaxTransforms == 2,
// "TransformCache assumes only two transforms");
Transform[] cam2world = new Transform[]
{
// todo: implement transform cache
//transformCache.Lookup(cam2worldSet[0]),
//transformCache.Lookup(cam2worldSet[1])
cam2worldSet[0],
cam2worldSet[1]
};
AnimatedTransform animatedCam2World = new AnimatedTransform(
cam2world[0],
transformStart,
cam2world[1],
transformEnd);
switch (name)
{
case "perspective":
camera = PerspectiveCamera.Create(paramSet, animatedCam2World, film, mediumInterface.Outside);
break;
//case "orthographic":
// camera = CreateOrthographicCamera(paramSet, animatedCam2World, film, mediumInterface.Outside);
// break;
//case "realistic":
// camera = CreateRealisticCamera(paramSet, animatedCam2World, film, mediumInterface.Outside);
// break;
//case "environment":
// camera = CreateEnvironmentCamera(paramSet, animatedCam2World, film, mediumInterface.Outside);
// break;
default:
//Warning("Camera \"%s\" unknown.", name.c_str());
break;
}
paramSet.ReportUnused();
return(camera);
}
public static SceneDescription Disk()
{
var primitives = new List <Primitive>()
{
new GeometricPrimitive(new Disk(Transform.Identity, 0.5f), new MatteMaterial(new Spectrum(1), 0))
};
var lights = new List <Light>()
{
new PointLight(Transform.Translate(0, 0, -5), new Spectrum(30))
};
return(new SceneDescription(new PrimitiveList(primitives), lights, PerspectiveCamera.Create(new Point3 <float>(0, 0, -1))));
}
public static SceneDescription Spheres()
{
var primitives = new List <Primitive>()
{
new GeometricPrimitive(new Sphere(Transform.Identity, 0.5f), new MatteMaterial(new Spectrum(1), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(-0.75f, 0.5f, 0.5f), 0.25f), new MatteMaterial(new Spectrum(1, 0, 0), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(0.3f, 0.25f, -0.5f), 0.1f), new MatteMaterial(new Spectrum(0, 1, 0), 0))
};
var lights = new List <Light>()
{
new PointLight(Transform.Translate(2, 5, -2), new Spectrum(30)),
new PointLight(Transform.Translate(0, -3, -3), new Spectrum(30))
};
return(new SceneDescription(new PrimitiveList(primitives), lights, PerspectiveCamera.Create(new Point3 <float>(0, 0, -1))));
}
public static void TestRender(int spp, int height)
{
var aspectRatio = 1f;
var width = (int)(height * aspectRatio);
var from = new Point(278, 278, -800f);
var to = new Point(278, 278, 0);
var fov = MathF.Deg(278f / 400f);
//var transform = Transform.LookAt2(from, to, Vectors.Up);
var transform = Transform.Translate(278, 278, -800);
var dist = Point.Distance(from, to);
var filter = new MitchellFilter(new Vector2(2f, 2f), 0.5f, 0.25f);
var film = new Film(new PixelVector(width, height), new Bounds2D(0, 0, 1, 1), filter, 20f, 1f);
var camera = PerspectiveCamera.Create(transform, aspectRatio, 0.8f, dist, fov, film);
//var integrator = new AmbientOcclusionIntegrator(true, 64, camera,
// new HaltonSampler(spp, film.GetSampleBounds()),
// film.CroppedBounds);
//var integrator = new DepthIntegrator(700f, 1000f, camera, new HaltonSampler(spp, film.GetSampleBounds()),
// film.CroppedBounds);
//var integrator = new NormalIntegrator(camera, new HaltonSampler(spp, film.GetSampleBounds()),
// film.CroppedBounds);
//var integrator = new WhittedIntegrator(5, camera, new HaltonSampler(spp, film.GetSampleBounds()),
// film.CroppedBounds);
var integrator = new PathIntegrator(5, camera, new HaltonSampler(spp, film.GetSampleBounds()),
film.CroppedBounds, 1f, LightSampleStrategy.Uniform);
film.SetSink(new Sink(Environment.GetFolderPath(Environment.SpecialFolder.MyPictures), "tri"));
var scene = Build();
Console.WriteLine("Rendering at {0}x{1}...", width, height);
var stopwatch = new Stopwatch();
stopwatch.Start();
integrator.Render(scene);
stopwatch.Stop();
Console.WriteLine("Done ({0})", stopwatch.Elapsed);
}
public static SceneDescription LargeAreaLight()
{
var lightTransform = Transform.LookAt(new Point3 <float>(0.5f, 1.5f, 0), new Point3 <float>(0, 0, 0), new Vector3 <float>(0, 1, 0)).Inverse();
var lightShape = new Disk(lightTransform, 4);
var light = new DiffuseAreaLight(lightTransform, new Spectrum(5), lightShape, 1, true);
var primitives = new List <Primitive>()
{
new GeometricPrimitive(new Disk(Transform.Translate(0, -1, 0) * Transform.RotateX(90), 1.5f), new MatteMaterial(new Spectrum(1), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(-0.75f, -0.5f, 0), 0.25f), new MatteMaterial(new Spectrum(1, 0, 0), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(0, -0.25f, 0), 0.25f), new MatteMaterial(new Spectrum(0, 1, 0), 0)),
new GeometricPrimitive(new Sphere(Transform.Translate(0.75f, 0, 0), 0.25f), new MatteMaterial(new Spectrum(1, 1, 0), 0)),
new GeometricPrimitive(lightShape, new MatteMaterial(new Spectrum(1), 0), light)
};
var lights = new List <Light>()
{
light
};
return(new SceneDescription(new PrimitiveList(primitives), lights, PerspectiveCamera.Create(new Point3 <float>(0, 1, -1), 100)));
}
public static void RowTestByDelegate(int spp, string fileSuffix, Func <float, int, IMaterial> materialFunc)
{
var dx = 3.65f;
var nX = 11;
var delta = 1f / (nX - 1);
var prims = new List <IPrimitive>();
for (var x = 0; x < nX; x++)
{
var s1t = Transform.Translate(x * dx, 0, 0);
var s1 = new Sphere(s1t, Transform.Invert(s1t), false, 1.5f, -1.5f, 1.5f, 360);
var s1g = new GeometricPrimitive(s1, materialFunc(delta * x, x + 1), null);
prims.Add(s1g);
}
var slt = Transform.Translate(5, 2, -4);
var slg = new Sphere(slt, Transform.Invert(slt), false, 0.5f, -0.5f, 0.5f, 360);
var ls = Spectrum.FromBlackbodyT(7500);
var dl = new DiffuseAreaLight(slt, null, ls * 100, 20, slg);
var sg = new GeometricPrimitive(slg, new MatteMaterial(new ConstantTexture <Spectrum>(ls), new ConstantTexture <float>(0f), null), dl);
prims.Add(sg);
var bvh = new BVH(prims.ToArray(), SplitMethod.HLBVH);
var mid = bvh.WorldBounds.Centroid;
var width = 1200;
var height = 140;
var from = new Point(mid.X, 6f, -12f);
var to = mid;
var fov = 5.6f;
var aspectRatio = (float)width / height;
var transform = Transform.Translate(mid.X, 0f, -50f);
var dist = Point.Distance(from, to);
var filter = new MitchellFilter(new Vector2(2.5f, 2.5f), 0.7f, 0.15f);
var film = new Film(new PixelVector(width, height), new Bounds2D(0, 0, 1, 1), filter, 20f, 1f);
var camera = PerspectiveCamera.Create(transform, aspectRatio, 0.0f, dist, fov, film);
//var integrator = new WhittedIntegrator(4, camera, new HaltonSampler(spp, film.GetSampleBounds()),
// film.CroppedBounds);
var integrator = new PathIntegrator(3, camera, new HaltonSampler(spp, film.GetSampleBounds()),
film.CroppedBounds, 6f, LightSampleStrategy.Spatial);
film.SetSink(new Sink(Environment.GetFolderPath(Environment.SpecialFolder.MyPictures), "row_" + fileSuffix));
var lt = Transform.Translate(mid.X - 60, 200, -80);
var s = Spectrum.FromBlackbodyT(4500) * 100000f;
var pl1 = new PointLight(lt, null, s);
lt = Transform.Translate(mid.X + 100, 100, -200);
s = Spectrum.FromBlackbodyT(2200) * 50000f;
var pl2 = new PointLight(lt, null, s);
lt = Transform.Translate(mid.X, 1000f, 0);
s = Spectrum.FromBlackbodyT(7000) * 5f;
var pl3 = new DistantLight(lt, s, new Vector(0, -0.5f, 1));
lt = Transform.Translate(mid.X, 10, -300);
s = Spectrum.FromBlackbodyT(5500) * 100000f;
var pl4 = new PointLight(lt, null, s);
var splt = Transform.RotateX(MathF.Rad(18f)).RotateY(MathF.Rad(75)).Translate(0, 10, -8);
s = Spectrum.FromBlackbodyT(5500) * 100000f;
var sl = new SpotLight(splt, null, s, 5f, 2f);
var scene = new Scene(bvh, new ILight[] { pl1, pl2, pl3, pl4, dl, sl });
//var scene = new Scene(bvh, new ILight[] { dl });
Console.WriteLine("Rendering at {0}x{1}...", width, height);
var stopwatch = new Stopwatch();
stopwatch.Start();
integrator.Render(scene);
stopwatch.Stop();
Console.WriteLine("Done ({0})", stopwatch.Elapsed);
}
