public static void Main(string[] args)
{
RayTracer rt = new RayTracer(800, 600, 1.0);
var bmp = new Bitmap(rt.Camera.OutputImageWidth, rt.Camera.OutputImageHeight);
HittableList world = new HittableList();
world.Add(new Sphere(new Point3(0, 0, -1), 0.5, new Lambertian(new color(0.1, 0.2, 0.5))));
world.Add(new Sphere(new Point3(0, -100.5, -1), 100, new Lambertian(new color(0.8, 0.8, 0))));
world.Add(new Sphere(new Point3(1, 0, -1), 0.5, new Metal(new color(0.8, 0.6, 0.2), 0)));
//world.Add(new Sphere(new Point3(-1, 0, -1), 0.5, new Metal(new color(0.8, 0.8, 0.8), 0.6)));
world.Add(new Sphere(new Point3(-1, 0, -1), 0.5, new Dielectric(1.5)));
for (int y = 0; y < rt.Camera.OutputImageHeight; ++y)
{
Console.WriteLine("Line: " + y.ToString() + "...");
for (int x = 0; x < rt.Camera.OutputImageWidth; ++x)
{
color pixelColor = color.Zero;
for (int s = 0; s < rt.SamplePerPixel; ++s)
{
var u = (double)(x + RayTracer.RandomDouble()) / (rt.Camera.OutputImageWidth - 1);
var v = (double)(y + RayTracer.RandomDouble()) / (rt.Camera.OutputImageHeight - 1);
Ray ray = rt.Camera.GetRay(u, v);
pixelColor += rt.ComputeRayColor(ray, world, RayTracer.MaxRecursiveDepth);
}
rt.WriteOutputColorAt(x, y, pixelColor, bmp);
}
}
Console.WriteLine("Save out final image.");
bmp.Save("/Users/jhq/Desktop/RT.bmp");
}
private static void AntiAlias()
{
var width = 400;
var height = 200;
var samples = 100;
var sb = new StringBuilder();
sb.AppendLine("P3");
sb.AppendLine(width + " " + height);
sb.AppendLine("255");
var world = new HittableList();
world.Add(new Sphere(new Vector3(0, 0, -1), 0.5f));
world.Add(new Sphere(new Vector3(0, -100.5f, -1), 100));
var camera = new Camera();
var col = new Func <Ray, IHitable, Vector3>((ray, w) => {
HitRecord rec;
if (w.Hit(ray, 0, Single.MaxValue, out rec))
{
return(new Vector3(rec.Normal.X + 1, rec.Normal.Y + 1, rec.Normal.Z + 1) * 0.5f);
}
var unit = ray.Direction.Normalize();
var t = 0.5f * (unit.Y + 1);
return(new Vector3(1, 1, 1) * (1.0f - t) + new Vector3(0.5f, 0.7f, 1.0f) * t);
});
var rand = new Random();
for (var y = height - 1; y >= 0; y--)
{
for (var x = 0; x < width; x++)
{
Vector3 color = new Vector3();
for (int i = 0; i < samples; i++)
{
var u = (float)(x + rand.NextDouble()) / width;
var v = (float)(y + rand.NextDouble()) / height;
var r = camera.GetRay(u, v);
color += col(r, world);
}
color /= (float)samples;
var ir = (int)(255.99 * color.R);
var ig = (int)(255.99 * color.G);
var ib = (int)(255.99 * color.B);
sb.AppendLine(ir + " " + ig + " " + ib);
}
}
File.WriteAllText("antialias.ppm", sb.ToString());
Process.Start("antialias.ppm");
}
private static void TwoSpheres()
{
var width = 400;
var height = 200;
var sb = new StringBuilder();
sb.AppendLine("P3");
sb.AppendLine(width + " " + height);
sb.AppendLine("255");
var lowerLeftCorner = new Vector3(-2, -1, -1);
var horizontal = new Vector3(4, 0, 0);
var vertical = new Vector3(0, 2, 0);
var origin = Vector3.Zero;
var world = new HittableList();
world.Add(new Sphere(new Vector3(0, 0, -1), 0.5f));
world.Add(new Sphere(new Vector3(0, -100.5f, -1), 100));
var col = new Func <Ray, IHitable, Vector3>((ray, w) => {
HitRecord rec;
if (w.Hit(ray, 0, Single.MaxValue, out rec))
{
return(new Vector3(rec.Normal.X + 1, rec.Normal.Y + 1, rec.Normal.Z + 1) * 0.5f);
}
var unit = ray.Direction.Normalize();
var t = 0.5f * (unit.Y + 1);
return(new Vector3(1, 1, 1) * (1.0f - t) + new Vector3(0.5f, 0.7f, 1.0f) * t);
});
for (var y = height - 1; y >= 0; y--)
{
for (var x = 0; x < width; x++)
{
var u = (float)x / width;
var v = (float)y / height;
var r = new Ray(origin, lowerLeftCorner + horizontal * u + vertical * v);
var color = col(r, world);
var ir = (int)(255.99 * color.R);
var ig = (int)(255.99 * color.G);
var ib = (int)(255.99 * color.B);
sb.AppendLine(ir + " " + ig + " " + ib);
}
}
File.WriteAllText("TwoSpheres.ppm", sb.ToString());
Process.Start("TwoSpheres.ppm");
}
