public void Run()
{
Stopwatch sw = new Stopwatch();
sw.Start();
int nx = 200;
int ny = 100;
// link to ppm viewer
// http://www.cs.rhodes.edu/welshc/COMP141_F16/ppmReader.html
Vector3 lowerLeftCorner = new Vector3(-2.0f, -1.0f, -1.0f);
Vector3 horizontal = new Vector3(4.0f, 0.0f, 0.0f);
Vector3 vertical = new Vector3(0.0f, 2.0f, 0.0f);
Vector3 origin = new Vector3(0.0f, 0.0f, 0.0f);
Hitable[] objList = new Hitable[2];
objList[0] = new Sphere(new Vector3(0, 0, -1), 0.5f);
objList[1] = new Sphere(new Vector3(0, -100.5f, -1), 100);
HitableList world = new HitableList(objList);
string filePath = @"d:\DEV_stuff\DEV\Sanbox\RayTracingSanbox\RayTracingInWeek\Output";
if (File.Exists(Path.Combine(filePath, "texture.ppm")))
{
File.Delete(Path.Combine(filePath, "texture.ppm"));
Console.WriteLine("Deleted file: " + Path.Combine(filePath, "texture.ppm"));
}
using (StreamWriter outputFile = new StreamWriter(Path.Combine(filePath, "texture.ppm"), true))
{
outputFile.Write("P3\n" + nx + " " + ny + "\n255\n");
//Console.Write("P3\n" + nx + " " + ny + "\n255\n");
for (int j = ny - 1; j >= 0; j--)
{
for (int i = 0; i < nx; i++)
{
float u = (float)i / (float)nx;
float v = (float)j / (float)ny;
Ray r = new Ray(origin, lowerLeftCorner + u * horizontal + v * vertical);
Vector3 p = r.PointAtParameter(2);
Vector3 col = Color(r, world);
int ir = (int)(255.99 * col.X);
int ig = (int)(255.99 * col.Y);
int ib = (int)(255.99 * col.Z);
outputFile.Write(ir + " " + ig + " " + ib + "\n");
//Console.Write(ir + " " + ig + " " + ib + "\n");
}
}
}
sw.Stop();
Console.WriteLine("Time to output image with StreamWriter : " + sw.ElapsedMilliseconds.ToString() + " ms");
Console.WriteLine("Press enter to close...");
Console.ReadLine();
}
Vector3 Color(Ray r, HitableList world)
{
HitRecord rec = new HitRecord();
if (world.hit(r, 0.001f, float.MaxValue, ref rec))
{
Vector3 target = rec.p + rec.normal + Sphere.random_in_unit_sphere();
return 0.5f * Color(new Ray(rec.p, target - rec.p), world);
}
else
{
Vector3 unitDirection = Vector3.Normalize(r.Direction());
float t = 0.5f * (unitDirection.Y + 1.0f);
return (1.0f - t) * new Vector3(1.0f, 1.0f, 1.0f) + t * new Vector3(0.5f, 0.7f, 1.0f);
}
}
Vector3 Color(Ray r, HitableList world)
{
HitRecord rec = new HitRecord();
if (world.hit(r, 0.0f, float.MaxValue, ref rec))
{
return(0.5f * new Vector3(rec.normal.X + 1.0f, rec.normal.Y + 1.0f, rec.normal.Z + 1.0f));
}
else
{
Vector3 unitDirection = Vector3.Normalize(r.Direction());
float t = 0.5f * (unitDirection.Y + 1.0f);
return((1.0f - t) * new Vector3(1.0f, 1.0f, 1.0f) + t * new Vector3(0.5f, 0.7f, 1.0f));
}
}
Vector3 Color(Ray r, HitableList world, int depth)
{
HitRecord rec = new HitRecord();
if (world.hit(r, 0.001f, float.MaxValue, ref rec))
{
Ray scattered = null;
Vector3 attenuation = new Vector3(0, 0, 0);
if (depth < 50 && rec.mat.scatter(r, rec, ref attenuation, ref scattered))
{
return(attenuation * Color(scattered, world, depth + 1));
}
else
{
return(new Vector3(0, 0, 0));
}
}
else
{
Vector3 unitDirection = Vector3.Normalize(r.Direction());
float t = 0.5f * (unitDirection.Y + 1.0f);
return((1.0f - t) * new Vector3(1.0f, 1.0f, 1.0f) + t * new Vector3(0.5f, 0.7f, 1.0f));
}
}
public void Run()
{
Stopwatch sw = new Stopwatch();
sw.Start();
int nx = 200;
int ny = 100;
// link to ppm viewer
// http://www.cs.rhodes.edu/welshc/COMP141_F16/ppmReader.html
Hitable[] objList = new Hitable[5];
objList[0] = new Sphere(new Vector3(0, 0, -1), 0.5f, new Lambertian(new Vector3(.8f, .3f, .3f)));
objList[1] = new Sphere(new Vector3(0, -100.5f, -1), 100, new Lambertian(new Vector3(.8f, .8f, 0)));
objList[2] = new Sphere(new Vector3(1, 0, -1), 0.5f, new Metal(new Vector3(.8f, .6f, .2f)));
objList[3] = new Sphere(new Vector3(-1, 0, -1), 0.5f, new Dielectric(1.5f));
objList[4] = new Sphere(new Vector3(-1, 0, -1), -0.45f, new Dielectric(1.5f));
HitableList world = new HitableList(objList);
Camera cam = new Camera(new Vector3(-2, 1, 0), new Vector3(0, 0, -1), new Vector3(0, 1, 0), 90, (float)nx / (float)ny);
int sampleCount = 100;
Random rdm = new Random();
string filePath = @"d:\DEV_stuff\DEV\Sanbox\RayTracingSanbox\RayTracingInWeek\Output";
if (File.Exists(Path.Combine(filePath, "texture.ppm")))
{
File.Delete(Path.Combine(filePath, "texture.ppm"));
Console.WriteLine("Deleted file: " + Path.Combine(filePath, "texture.ppm"));
}
using (StreamWriter outputFile = new StreamWriter(Path.Combine(filePath, "texture.ppm"), true))
{
outputFile.Write("P3\n" + nx + " " + ny + "\n255\n");
//Console.Write("P3\n" + nx + " " + ny + "\n255\n");
for (int j = ny - 1; j >= 0; j--)
{
for (int i = 0; i < nx; i++)
{
Vector3 col = new Vector3(0, 0, 0);
for (int c = 0; c < sampleCount; c++)
{
float u = ((float)i + (float)rdm.NextDouble()) / (float)nx;
float v = ((float)j + (float)rdm.NextDouble()) / (float)ny;
Ray r = cam.getRay(u, v);
Vector3 p = r.PointAtParameter(2);
col += Color(r, world, 10);
}
col /= (float)sampleCount;
col = new Vector3((float)(Math.Sqrt(col.X)), (float)Math.Sqrt(col.Y),
(float)Math.Sqrt(col.Z));
int ir = (int)(255.99 * col.X);
int ig = (int)(255.99 * col.Y);
int ib = (int)(255.99 * col.Z);
outputFile.Write(ir + " " + ig + " " + ib + "\n");
//Console.Write(ir + " " + ig + " " + ib + "\n");
}
}
}
sw.Stop();
Console.WriteLine("Time to output image with StreamWriter : " + sw.ElapsedMilliseconds.ToString() + " ms");
Console.WriteLine("Press enter to close...");
Console.ReadLine();
}
public void Run()
{
Stopwatch sw = new Stopwatch();
sw.Start();
int nx = 1280;
int ny = 760;
// link to ppm viewer
// http://www.cs.rhodes.edu/welshc/COMP141_F16/ppmReader.html
HitableList world = random_scene();
Vector3 lookfrom = new Vector3(13f, 2f, 3f);
Vector3 lookat = new Vector3(0f, 0f, 0f);
float dist_to_focus = (lookfrom - lookat).Length();
float aperture = 0f;
Camera cam = new Camera(lookfrom, lookat, new Vector3(0f, 1f, 0f), 30f, (float)nx / (float)ny, aperture, 0.7f * dist_to_focus);
int sampleCount = 10;
Random rdm = new Random();
string filePath = @"d:\DEV_stuff\DEV\Sanbox\RayTracingSanbox\RayTracingInWeek\Output";
if (File.Exists(Path.Combine(filePath, "texture.ppm")))
{
File.Delete(Path.Combine(filePath, "texture.ppm"));
Console.WriteLine("Deleted file: " + Path.Combine(filePath, "texture.ppm"));
}
using (StreamWriter outputFile = new StreamWriter(Path.Combine(filePath, "texture.ppm"), true))
{
outputFile.Write("P3\n" + nx + " " + ny + "\n255\n");
//Console.Write("P3\n" + nx + " " + ny + "\n255\n");
for (int j = ny - 1; j >= 0; j--)
{
for (int i = 0; i < nx; i++)
{
Vector3 col = new Vector3(0, 0, 0);
for (int c = 0; c < sampleCount; c++)
{
float u = ((float)i + (float)rdm.NextDouble()) / (float)nx;
float v = ((float)j + (float)rdm.NextDouble()) / (float)ny;
Ray r = cam.getRayDOF(u, v);
Vector3 p = r.PointAtParameter(2);
col += Color(r, world, 10);
}
col /= (float)sampleCount;
col = new Vector3((float)(Math.Sqrt(col.X)), (float)Math.Sqrt(col.Y),
(float)Math.Sqrt(col.Z));
int ir = (int)(255.99 * col.X);
int ig = (int)(255.99 * col.Y);
int ib = (int)(255.99 * col.Z);
outputFile.Write(ir + " " + ig + " " + ib + "\n");
//Console.Write(ir + " " + ig + " " + ib + "\n");
}
}
}
sw.Stop();
Console.WriteLine("Time to output image with StreamWriter : " + sw.ElapsedMilliseconds.ToString() + " ms");
Console.WriteLine("Press enter to close...");
Console.ReadLine();
}
