static void Main(string[] args)
{
int image_width = 384;
int image_height = image_width;
float aspect_ratio = (float)image_width / image_height;
int samples_per_pixel = 100;
int max_depth = 50;
string filePath = "image.ppm";
using (var file = new StreamWriter(filePath))
{
file.WriteLine($"P3\n{image_width} {image_height}\n255");
float viewport_height = 2.0f;
float viewport_width = aspect_ratio * viewport_height;
float focal_length = 1.0f;
var origin = Vector3.Zero;
var horizontal = new Vector3(viewport_width, 0, 0);
var vertical = new Vector3(0, viewport_height, 0);
var lower_left_corner = origin - horizontal / 2 - vertical / 2 - new Vector3(0, 0, focal_length);
Hitable_List world = Final_scene();
Vector3 lookfrom = new Vector3(478, 278, -600);
Vector3 lookat = new Vector3(278, 278, 0);
Vector3 vup = new Vector3(0, 1, 0);
float dist_to_focus = 10.0f;
float aperture = 0.0f;
float vfov = 40.0f;
Vector3 background = new Vector3(0.0f, 0.0f, 0.0f);
Camera cam = new Camera(lookfrom, lookat, vup, vfov, aspect_ratio, aperture, dist_to_focus, 0.0f, 1.0f);
for (int j = image_height - 1; j >= 0; --j)
{
Console.WriteLine($"\rScanlines remaining: {j}");
for (int i = 0; i < image_width; ++i)
{
Vector3 pixel_color = Vector3.Zero;
for (int s = 0; s < samples_per_pixel; ++s)
{
float u = (float)(i + Helpers.random.NextDouble()) / (image_width - 1);
float v = (float)(j + Helpers.random.NextDouble()) / (image_height - 1);
Ray r = cam.Get_Ray(u, v);
pixel_color += Ray_color(r, background, world, max_depth);
}
Write_color(file, pixel_color, samples_per_pixel);
}
}
Console.WriteLine("Done.");
}
}
public static Hitable_List Final_scene()
{
Hitable_List boxes1 = new Hitable_List();
var ground = new Lambertian(new Solid_Color(0.48f, 0.83f, 0.53f));
const int boxes_per_side = 20;
for (int i = 0; i < boxes_per_side; i++)
{
for (int j = 0; j < boxes_per_side; j++)
{
var w = 100.0f;
var x0 = -1000.0f + i * w;
var z0 = -1000.0f + j * w;
var y0 = 0.0f;
var x1 = x0 + w;
var y1 = Helpers.RandomFloat(1, 101);
var z1 = z0 + w;
boxes1.Add(new Box(new Vector3(x0, y0, z0), new Vector3(x1, y1, z1), ground));
}
}
Hitable_List objects = new Hitable_List();
objects.Add(new BVH_Node(boxes1, 0, 1));
var light = new Diffuse_light(new Solid_Color(7, 7, 7));
objects.Add(new XZ_rect(123, 423, 147, 412, 554, light));
var center1 = new Vector3(400, 400, 200);
var center2 = center1 + new Vector3(30, 0, 0);
var moving_sphere_material = new Lambertian(new Solid_Color(0.7f, 0.3f, 0.1f));
objects.Add(new Moving_Sphere(center1, center2, 0, 1, 50, moving_sphere_material));
objects.Add(new Sphere(new Vector3(260, 150, 45), 50, new Dielectric(1.5f)));
objects.Add(new Sphere(new Vector3(0, 150, 145), 50, new Metal(new Vector3(0.8f, 0.8f, 0.9f), 10.0f)));
var boundary = new Sphere(new Vector3(360, 150, 145), 70, new Dielectric(1.5f));
objects.Add(boundary);
objects.Add(new Constant_medium(boundary, 0.2f, new Solid_Color(0.2f, 0.4f, 0.9f)));
boundary = new Sphere(new Vector3(0, 0, 0), 5000, new Dielectric(1.5f));
objects.Add(new Constant_medium(boundary, .0001f, new Solid_Color(1, 1, 1)));
var emat = new Lambertian(new Image_texture("Resources/earthmap2.png"));
objects.Add(new Sphere(new Vector3(400, 200, 400), 100, emat));
var pertext = new Noise_texture(0.1f);
objects.Add(new Sphere(new Vector3(220, 280, 300), 80, new Lambertian(pertext)));
Hitable_List boxes2 = new Hitable_List();
var white = new Lambertian(new Solid_Color(.73f, .73f, .73f));
int ns = 1000;
for (int j = 0; j < ns; j++)
{
boxes2.Add(new Sphere(Helpers.RandomVector3(0, 165), 10, white));
}
objects.Add(new Translate(
new Rotate_y(
new BVH_Node(boxes2, 0.0f, 1.0f), 15),
new Vector3(-100, 270, 395)
)
);
return(objects);
}
public BVH_Node(Hitable_List list, float time0, float time1)
: this(list.Objects, 0, (uint)list.Objects.Count, time0, time1)
{
}
public Box()
{
this.sides = new Hitable_List();
}