snoopy/include/scene.h

101 lines
2.8 KiB
C

#pragma once
#include "math.h"
#include "sphere.h"
#include "colour.h"
#include "material.h"
#include "hittable.h"
#include "hittable_list.h"
colour ray_colour(const ray& r, const hittable& world, int depth)
{
hit_record rec;
if (depth <= 0)
{
return grey;
}
if (world.hit(r, 0.001, infinity, rec))
{
ray scattered;
colour attenuation;
if (rec.mat_ptr->scatter(r, rec, attenuation, scattered))
{
return attenuation * ray_colour(scattered, world, depth-1);
}
return grey;
}
vec3 unit_direction = unit_vector(r.direction());
auto t = 0.5 * (unit_direction.y() + 1.0) + 0.5;
return lerp(grey, pink, t);
}
hittable_list random_scene()
{
hittable_list world;
//auto ground_material = make_shared<lambertian>(pink);
//world.add(make_shared<sphere>(point3(0,-1000,0), 1000, ground_material));
//for (int a = -11; a < 11; a++)
//{
// for (int b = -11; b < 11; b++)
// {
// auto choose_mat = random_double();
// point3 centre(a + 0.9*random_double(), 0.2, b + 0.9*random_double());
// if ((centre - point3(4, 0.2, 0)).length() > 0.9)
// {
// shared_ptr<material> sphere_material;
// if (choose_mat < 0.8)
// {
// // diffuse
// //auto albedo = colour::random() * colour::random();
// sphere_material = make_shared<lambertian>(pink);
// world.add(make_shared<sphere>(centre, 0.2, sphere_material));
// }
// else if (choose_mat < 0.95)
// {
// // metal
// auto fuzz = random_double(0, 0.5);
// sphere_material = make_shared<metal>(pink, fuzz);
// world.add(make_shared<sphere>(centre, 0.2, sphere_material));
// }
// else
// {
// // glass
// sphere_material = make_shared<dielectric>(1.5);
// world.add(make_shared<sphere>(centre,0.2, sphere_material));
// }
// }
// }
//}
auto material1 = make_shared<dielectric>(1.5);
world.add(make_shared<sphere>(point3(0, 0, 0), 3.0, material1));
//auto material2 = make_shared<lambertian>(pink);
//world.add(make_shared<sphere>(point3(-4, 1, 0), 1.0, material2));
auto material3 = make_shared<metal>(pink, 0.5);
int sphere_count = 10;
for (int i = 0; i < sphere_count; i++)
{
float a = 6.28 * (float)i/sphere_count - 100.0;
float r = 8.0;
float x = r*sin(a);
float y = 2.0*cos(a);
float z = r*cos(a);
point3 pos(x,y,z);
world.add(make_shared<sphere>(pos, 2.0, material3));
}
return world;
}