public DiffuseAreaLight(Shape s, Spectrum l, double intensity = 1, SideEnum sd = SideEnum.Front)
{
shape = s;
Lemit = l * intensity;
side = sd;
}
public Spectrum AddTo(Spectrum v2)
{
c += v2.c;
return(this);
}
public Spectrum Li(Ray r, Scene s)
{
Spectrum L = Spectrum.ZeroSpectrum;
Spectrum B = Spectrum.Create(1);
int nbounces = 0;
while (nbounces < 20)
{
SurfaceInteraction isect = null;
//Get the object the ray intersected with
isect = s.Intersect(r).Item2;
//If the ray hasn't hit anything return 0
if (isect == null)
{
break;
}
Vector3 wo = isect.Wo;//-r.d;
//If the ray hit a light, take its emission
if (isect.Obj is Light)
{
if (nbounces == 0)
{
L = B * isect.Le(wo);
}
break;
}
//Create a light ray from the intersection point and add its emission
Spectrum Ld = Light.UniformSampleOneLight(isect, s);
L = L.AddTo(B * Ld);
//Get the materials value at this point
(Spectrum f, Vector3 wi, double pr, bool specular) = (isect.Obj as Shape).BSDF.Sample_f(wo, isect);
if (!specular)
{
B = B * f * Utils.AbsCosTheta(wi) / pr;
}
//Spawn a new ray from the intersection
r = isect.SpawnRay(wi);
if (nbounces > 3)
{
double q = 1.0 - B.Max();
if (ThreadSafeRandom.NextDouble() < q)
{
break;
}
B = B / (1 - q);
}
nbounces++;
}
return(L);
}
public Lambertian(Spectrum r)
{
kd = r;
}
public OrenNayar(Spectrum r, double roughness)
{
kd = r;
this.cov = roughness * roughness;
}
public Spectrum Li(Ray ray, Scene s)
{
var L = Spectrum.ZeroSpectrum;
var beta = Spectrum.Create(1.0);
bool specularBounce = false;
for (int nBounces = 0; nBounces < 20; nBounces++)
{
(double?d, SurfaceInteraction si) = s.Intersect(ray);
Vector3 wo = -ray.d;
if (nBounces == 0 || specularBounce)
{
if (d != null)
{
L.AddTo(beta * si.Le(wo));
}
else
{
foreach (var light in s.Lights)
{
L.AddTo(beta * Spectrum.ZeroSpectrum); // light.Le()
}
}
}
if (d == null)
{
break;
}
if (si.Obj is Light)
{
//if (nBounces == 0)
//{
// L.AddTo(beta * si.Le(wo));
//}
break;
}
if (!specularBounce)
{
L.AddTo(beta * Light.UniformSampleOneLight(si, s));
}
(Spectrum f, Vector3 wiW, double pdf, bool bxdfIsSpecular) = ((Shape)si.Obj).BSDF.Sample_f(wo, si);
specularBounce = bxdfIsSpecular;
if (f.IsBlack() || pdf == 0)
{
break;
}
var wi = si.SpawnRay(wiW);
beta = beta * f * Vector3.AbsDot(wiW, si.Normal) / pdf;
ray = wi;
if (nBounces > 3)
{
double q = 1 - beta.Max();
if (ThreadSafeRandom.NextDouble() < q)
{
break;
}
beta = beta / (1 - q);
}
}
return(L);
}
public SpecularTransmission(Spectrum r, double fresnel1, double fresnel2)
{
this.r = r;
fresnel = new FresnelDielectric(fresnel1, fresnel2);
}
/// <summary>
/// Generate Cornell Box Geometry
/// </summary>
/// <returns></returns>
public static Scene CornellBox()
{
var s = new Scene()
{
CameraOrigin = new Vector3(278, 274.4, -548),
AspectRatio = 1.0 / 1.0,
ImagePlaneWidth = 5.2
};
Shape el;
// floor
el = new Quad(556.0, 559.2, Transform.Translate(556.0 / 2, 0, 559.2 / 2).A(Transform.RotateX(-90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Gray)));
s.Elements.Add(el);
// celing
el = new Quad(556.0, 559.2, Transform.Translate(556.0 / 2, 548.8, 559.2 / 2).A(Transform.RotateX(90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Gray)));
s.Elements.Add(el);
// back
el = new Quad(556.0, 548.8, Transform.Translate(556.0 / 2, 548.8 / 2, 559.2).A(Transform.RotateX(180)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Gray)));
s.Elements.Add(el);
//right
el = new Quad(559.2, 548.8, Transform.Translate(556.0, 548.8 / 2, 559.2 / 2).A(Transform.RotateY(90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Gray)));
s.Elements.Add(el);
//left
el = new Quad(559.2, 548.8, Transform.Translate(0, 548.8 / 2, 559.2 / 2).A(Transform.RotateY(-90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Gray)));
s.Elements.Add(el);
double shade = 1;
double intensity = 20;
s.Elements.Add(new DiffuseAreaLight(new Quad(556, 200, Transform.Translate(278, 548, 559.2 - 400).A(Transform.RotateX(90))), Spectrum.Create(1), intensity));
s.Elements.Add(new DiffuseAreaLight(new Quad(556, 200, Transform.Translate(278, 0.1, 559.2 - 400).A(Transform.RotateX(270))), Spectrum.Create(1), intensity));
//s.Elements.Add(new RectangleLight(new Quad(556, 200, Transform.Translate(278, 548.8 / 2, 559.2 - 200).A(Transform.RotateX(270))), Spectrum.Create(1), intensity, false));
//s.Elements.Add(new RectangleLight(new Quad(100, 200, Transform.Translate(278, 548.8 * 3 / 4, 559.2 - 200).A(Transform.RotateX(270))), Spectrum.Create(1), intensity, false));
//s.Elements.Add(new RectangleLight(new Quad(100, 200, Transform.Translate(278, 548.8 * 1 / 4, 559.2 - 200).A(Transform.RotateX(270))), Spectrum.Create(1), intensity, false));
//left
//s.Elements.Add(new DiffuseAreaLight(new Quad(548.8, 556.0, Transform.Translate(0.1, 548.8 / 2, 559.2).A(Transform.RotateY(90))), Spectrum.Create(shade), intensity));
//right
//s.Elements.Add(new DiffuseAreaLight(new Quad(548.8, 556.0, Transform.Translate(555.9, 548.8 / 2, 559.2).A(Transform.RotateY(270))), Spectrum.Create(shade), intensity));
//s.Elements.Add(new DiffuseAreaLight(new Disk(80, 0.1, Transform.Translate(278, 0, 280).A(Transform.RotateX(-90))), Spectrum.Create(1), 20));
//s.Elements.Add(new RectangleLight(new Quad(160, 80, Transform.Translate(278, 278, 350).A(Transform.RotateX(135))), Spectrum.Create(1), 20));
double gridSize = 4;
double sphereSize = 70;
double offsetX = 550 / gridSize;
double offsetY = 550 / gridSize;
double row = 0;
double column = 0;
double z = 400;
string[] models =
{
"beige-fabric", "yellow-matte-plastic", "green-plastic", "neoprene-rubber",
"blue-rubber", "polyurethane-foam", "special-walnut-224", "yellow-phenolic",
"green-metallic-paint", "red-metallic-paint", "violet-acrylic", "grease-covered-steel",
"aluminium", "alum-bronze", "two-layer-silver", "two-layer-gold"
};
foreach (string model in models)
{
el = new Sphere(sphereSize, Transform.Translate((column + 0.5) * offsetX, (row + 0.5) * offsetY, z));
column++;
if (column % gridSize == 0)
{
row++;
column = 0;
}
el.BSDF.Add(new MERL(model, true));
//el.BSDF.Add(new SpecularReflection(Spectrum.ZeroSpectrum.FromRGB(Color.White), 1, 1.5));
s.Elements.Add(el);
}
return(s);
}
/// <summary>
/// Generate Cornell Box Geometry
/// </summary>
/// <returns></returns>
public static Scene CornellBox()
{
var s = new Scene()
{
CameraOrigin = new Vector3(278, 274.4, -548), // -800
AspectRatio = 1.0 / 1.0,
ImagePlaneWidth = 7 // 5.5
};
Shape el;
// floor
el = new Quad(556.0, 559.2 * 3, Transform.Translate(556.0 / 2, 0, 559.2 / 2).A(Transform.RotateX(-90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.White)));
s.Elements.Add(el);
// celing
el = new Quad(556.0, 559.2 * 3, Transform.Translate(556.0 / 2, 548.8, 559.2 / 2).A(Transform.RotateX(90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.White)));
s.Elements.Add(el);
// back
el = new Quad(556.0, 548.8, Transform.Translate(556.0 / 2, 548.8 / 2, 559.2).A(Transform.RotateX(180)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.White)));
s.Elements.Add(el);
// back2
el = new Quad(556.0, 548.8, Transform.Translate(556.0 / 2, 548.8 / 2, -550).A(Transform.RotateX(180)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.White)));
s.Elements.Add(el);
//double[] brdfs2 = ReadMerl.Read(@"D:\NRG seminarska\green-plastic.binary");
//right
el = new Quad(559.2 * 3, 548.8, Transform.Translate(556.0, 548.8 / 2, 559.2 / 2).A(Transform.RotateY(90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Green)));
//el.BSDF.Add(new Merl(brdfs2));
s.Elements.Add(el);
//left
el = new Quad(559.2 * 3, 548.8, Transform.Translate(0, 548.8 / 2, 559.2 / 2).A(Transform.RotateY(-90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Red)));
s.Elements.Add(el);
// luč
// kvadratna luč
s.Elements.Add(new DiffuseAreaLight(new Quad(170, 170, Transform.Translate(278, 548, 220).A(Transform.RotateX(90))), Spectrum.Create(1), 25));
s.Elements.Add(new DiffuseAreaLight(new Quad(170, 170, Transform.Translate(278, 548, -280).A(Transform.RotateX(90))), Spectrum.Create(1), 25));
//s.Elements.Add(new DiffuseAreaLight(new Disk(100, 0.1, Transform.Translate(278, 548, 280).A(Transform.RotateX(90))), Spectrum.Create(1), 20));
//s.Elements.Add(new DiffuseAreaLight(new Disk(100, 0.1, Transform.Translate(278, 548, 0).A(Transform.RotateX(90))), Spectrum.Create(1), 30));
//s.Elements.Add(new DiffuseAreaLight(new Disk(100, 0.1, Transform.Translate(278, 548, -280).A(Transform.RotateX(90))), Spectrum.Create(1), 20));
//s.Elements.Add(new DiffuseAreaLight(new Sphere(80, Transform.Translate(278, 548, 280).A(Transform.RotateX(90))), Spectrum.Create(1), 20));
//s.Elements.Add(new DiffuseAreaLight(new Sphere(80, Transform.Translate(278, 548, 280)), Spectrum.Create(1), 20));
//s.Elements.Add(new DiffuseAreaLight(new Sphere(60, Transform.Translate(278, 280, 300).A(Transform.RotateX(90))), Spectrum.Create(1), 20));
//s.Elements.Add(new DiffuseAreaLight(new Sphere(80, Transform.Translate(400, 80, 400).A(Transform.RotateX(90))), Spectrum.Create(1), 20));
//s.Elements.Add(new DiffuseAreaLight(new Sphere(1100, Transform.Translate(278, 280, 280).A(Transform.RotateX(90))), Spectrum.Create(1), 20));
double[] brdfs0 = ReadMerl.Read(@"D:\NRG seminarska\gold-metallic-paint.binary");
//double[] brdfs0 = ReadMerl.Read(@"D:\NRG seminarska\white-acrylic.binary");
//double[] brdfs0 = ReadMerl.Read(@"D:\NRG seminarska\white-diffuse-bball.binary");
//double[] brdfs0 = ReadMerl.Read(@"D:\NRG seminarska\white-fabric.binary");
//double[] brdfs0 = ReadMerl.Read(@"D:\NRG seminarska\white-fabric2.binary");
//double[] brdfs0 = ReadMerl.Read(@"D:\NRG seminarska\white-marble.binary");
//double[] brdfs0 = ReadMerl.Read(@"D:\NRG seminarska\white-paint.binary");
//double[] brdfs0 = ReadMerl.Read(@"D:\NRG seminarska\ss440.binary");
// modra krogla
//el = new Sphere(100, Transform.Translate(150, 100, 420));
//el = new Sphere(130, Transform.Translate(180, 130, 400));
//el.BSDF.Add(new SpecularReflection(Spectrum.ZeroSpectrum.FromRGB(Color.White), 0, 0));
//el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Blue)));
//el.BSDF.Add(new OrenNayar(Spectrum.ZeroSpectrum.FromRGB(Color.Blue), 10));
//el.BSDF.Add(new Merl(brdfs1));
//s.Elements.Add(el);
//rumena krogla
//el = new Sphere(130, Transform.Translate(400, 130, 230));
el = new Sphere(200, Transform.Translate(250, 200, 230));
//el.BSDF.Add(new SpecularReflection(Spectrum.ZeroSpectrum.FromRGB(Color.White),0,0));
//el.BSDF.Add(new SpecularReflection(Spectrum.ZeroSpectrum.FromRGB(Color.White),0.25,0.6));
//el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Yellow)));
//el.BSDF.Add(new OrenNayar(Spectrum.ZeroSpectrum.FromRGB(Color.Yellow), 5));
el.BSDF.Add(new Merl(brdfs0));
//el.BSDF.Add(new SpecularReflection(Spectrum.ZeroSpectrum.FromRGB(Color.White), 1, 1.5));
s.Elements.Add(el);
//el = new Sphere(60, Transform.Translate(180, 60, 100));
//el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Yellow)));
//s.Elements.Add(el);
return(s);
}
public static Scene AllMerlInOne()
{
var s = new Scene()
{
CameraOrigin = new Vector3(278, 274.4, -548), // -800
AspectRatio = 1.0 / 1.0,
ImagePlaneWidth = 5 // 5.5
};
Shape el;
// floor
el = new Quad(556.0, 559.2 * 2, Transform.Translate(556.0 / 2, 0, 559.2 / 2).A(Transform.RotateX(-90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.White)));
s.Elements.Add(el);
// celing
el = new Quad(556.0, 559.2 * 2, Transform.Translate(556.0 / 2, 548.8, 559.2 / 2).A(Transform.RotateX(90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.White)));
s.Elements.Add(el);
// back
el = new Quad(556.0, 548.8, Transform.Translate(556.0 / 2, 548.8 / 2, 559.2).A(Transform.RotateX(180)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.White)));
s.Elements.Add(el);
// back2
el = new Quad(556.0, 548.8, Transform.Translate(556.0 / 2, 548.8 / 2, -550).A(Transform.RotateX(180)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.White)));
s.Elements.Add(el);
// right
el = new Quad(559.2 * 2, 548.8, Transform.Translate(556.0, 548.8 / 2, 559.2 / 2).A(Transform.RotateY(90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Green)));
s.Elements.Add(el);
// left
el = new Quad(559.2 * 2, 548.8, Transform.Translate(0, 548.8 / 2, 559.2 / 2).A(Transform.RotateY(-90)));
el.BSDF.Add(new Lambertian(Spectrum.ZeroSpectrum.FromRGB(Color.Red)));
s.Elements.Add(el);
// luč
// kvadratna luč
s.Elements.Add(new DiffuseAreaLight(new Quad(170, 170, Transform.Translate(278, 548, 200).A(Transform.RotateX(90))), Spectrum.Create(1), 31));
s.Elements.Add(new DiffuseAreaLight(new Quad(170, 170, Transform.Translate(278, 548, -280).A(Transform.RotateX(90))), Spectrum.Create(1), 35));
DirectoryInfo d = new DirectoryInfo(@"D:\NRG seminarska\");
FileInfo[] Files = d.GetFiles("*.binary");
//int xOff = 25;
//int yOff = 25;
//int countSpheres = 0;
//foreach (FileInfo file in Files)
//{
// double[] brdf0 = ReadMerl.Read(@"D:\NRG seminarska\" + file.Name);
// el = new Sphere(25, Transform.Translate(xOff, yOff, 400));
// el.BSDF.Add(new Merl(brdf0));
// s.Elements.Add(el);
// countSpheres++;
// xOff += 52;
// if (countSpheres % 10 == 0)
// {
// yOff += 52;
// xOff = 25;
// }
// if (countSpheres == 49)
// {
// //break;
// }
//}
//int xOff = 38;
//int yOff = 38;
//int countSpheres = 0;
//foreach (FileInfo file in Files)
//{
// //if (countSpheres < 49) {
// // countSpheres++;
// // continue;
// //}
// double[] brdf0 = ReadMerl.Read(@"D:\NRG seminarska\" + file.Name);
// el = new Sphere(36, Transform.Translate(xOff, yOff, 480));
// el.BSDF.Add(new Merl(brdf0));
// s.Elements.Add(el);
// countSpheres++;
// xOff += 77;
// if (countSpheres % 7 == 0)
// {
// yOff += 77;
// xOff = 38;
// }
// if (countSpheres == 49) //49 //98
// {
// break;
// }
//}
int xOff = 55;
int yOff = 55;
int countSpheres = 0;
foreach (FileInfo file in Files)
{
double[] brdf0 = ReadMerl.Read(@"D:\NRG seminarska\" + file.Name);
el = new Sphere(50, Transform.Translate(xOff, yOff, 480));
el.BSDF.Add(new Merl(brdf0));
el.BSDF.Add(new SpecularReflection(Spectrum.ZeroSpectrum.FromRGB(Color.White), 1, 1.5));
s.Elements.Add(el);
countSpheres++;
xOff += 105;
if (countSpheres % 5 == 0)
{
yOff += 105;
xOff = 55;
}
if (countSpheres == 25)
{
break;
}
}
return(s);
}
public void Render(Scene s, CancellationToken token)
{
var integrator = new PathTracer();
// Use ParallelOptions instance to store the CancellationToken
ParallelOptions po = new ParallelOptions()
{
MaxDegreeOfParallelism = 8,
CancellationToken = token
};
try
{
//DirectoryInfo d = new DirectoryInfo(@"D:\NRG seminarska\");
//FileInfo[] Files = d.GetFiles("*.binary");
//foreach (FileInfo file in Files)
//{
//Scene.brdfFileName = file.Name;
//Console.WriteLine(file.Name);
//while (totalSamples < maxTotalSamples)
while (true)
{
var samples = SamplePointsOnImagePlane(s, 1);
Parallel.ForEach(samples, po, samp =>
{
// if cancel requested from GUI, cancel
token.ThrowIfCancellationRequested();
var rayTo = new Vector3(samp.X - s.ImagePlaneWidth / 2, samp.Y - s.ImagePlaneHeight / 2 + s.ImagePlaneVerticalOffset, s.ImagePlaneDistance);
// ray through point
Ray r = new Ray(s.CameraOrigin, rayTo);
// evaluate radiance
Spectrum L = integrator.Li(r, s);
// add radiance to image
AddToImage(samp, L, s);
});
}
//Neki:
// try
// {
// finalRgbImage.Save(@"D:\NRG seminarska\" + DateTime.Now.ToString().Replace("/", "-").Replace(":", "-").Replace(" ", "_") + "_" + file.Name.Replace(".binary", "") + ".png", ImageFormat.Png);
// }
// catch (Exception)
// {
// Thread.Sleep(1);
// goto Neki;
// }
// s = Scene.CornellBox();
// finalImageSum = new Spectrum[pixelWidth, pixelHeight];
// finalImage = new Spectrum[pixelWidth, pixelHeight];
// finalRgbImage = new Bitmap(160, (int)Math.Round(160 / s.AspectRatio), PixelFormat.Format24bppRgb);
// pixelWeights = new double[pixelWidth, pixelHeight];
// bmp = finalRgbImage;
// totalSamples = 0;
//bmp = b;
//}
}
catch (OperationCanceledException)
{
}
catch (Exception e) {
Console.WriteLine(e);
}
}
public RectangleLight(Quad q, Spectrum l, double intensity = 1, bool onesided = true)
{
quad = q;
Lemit = l * intensity;
this.onesided = onesided;
}
