Phireh/cpp-raytracer
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Basic diffuse mapping and gamma correction

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This commit is contained in:
Phireh 2021-08-21 19:43:19 +02:00
commit 4497cc7f68
4 changed files with 41 additions and 10 deletions
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15
main.cpp
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@ -8,15 +8,21 @@
#include "sphere.hpp"
#include "camera.hpp"
color ray_color(const ray& r, const hittable& world);
color ray_color(const ray& r, const hittable& world, int32_t depth);
double hit_sphere(const point3& center, double radius, const ray& r);
color ray_color(const ray& r, const hittable& world)
color ray_color(const ray& r, const hittable& world, int32_t depth)
{
if (depth <= 0)
{
return color(0,0,0);
}
hit_record rec;
if (world.hit(r, 0, INFINITY, rec))
{
return 0.5 * (rec.normal + color(1,1,1));
point3 target = rec.p + rec.normal + random_in_unit_sphere();
return 0.5 * ray_color(ray(rec.p, target - rec.p), world, depth-1);
}
vec3 unit_direction = normalize(r.direction);
double t = 0.5 * (unit_direction.y + 1.0);
@ -47,6 +53,7 @@ int main()
const int32_t image_width = 400;
const int32_t image_height = (int32_t) (image_width / aspect_ratio);
int32_t samples_per_pixel = 100;
int32_t max_depth = 50;
if (getenv("SPP"))
{
@ -79,7 +86,7 @@ int main()
double u = ((i + random_double()) / (image_width-1));
double v = ((j + random_double()) / (image_height-1));
ray r = cam.get_ray(u,v);
pixel_color += ray_color(r, world);
pixel_color += ray_color(r, world, max_depth);
}
write_color(stdout, pixel_color, samples_per_pixel);