t_vec3f single_tracer(t_params p, t_ray *ray, t_objects *sp)
{
int i;
t_vec3f trans;
t_vec3f tmp;
t_vec3f light_dir;
t_color scolor;
i = 0;
if (dot_vec3f(&ray->dir, &p.nhit) > 0)
p.nhit = scale_vec3f(&p.nhit, -1);
scolor = new_uni_color(0);
while (i < sp->top)
{
if (sp->store[i].type == LIGHT)
{
light_dir = normalize_vec3f(sub_vec3f(&sp->store[i].pos, &p.phit));
if (sp->store[i].nature == AREA_LIGHT)
trans = soft_shadows(p, ray, sp, i);
else
trans = sharp_shadows(p, ray, sp, light_dir);
tmp = phong_shading(trans, ray, p, light_dir, sp->store[i].ecolor);
scolor = add_vec3f(&scolor, &tmp);
}
i++;
}
return (add_vec3f(&scolor, &p.sphere->ecolor));
}
void throw_ray(t_ray *ray, int calculate_light,
t_object *to_ignore, int recursivity)
{
float tmp_t;
t_object *obj;
t_ray reflected;
obj = env->scene->objects;
ray->inter_t = INFINITY;
ray->closest = NULL;
ray->color.red = 0.0;
ray->color.green = 0.0;
ray->color.blue = 0.0;
while (obj)
{
if (!to_ignore || obj != to_ignore)
{
tmp_t = intersection(obj, ray);
ray->closest = (tmp_t < ray->inter_t) ? obj : ray->closest;
ray->inter_t = (tmp_t < ray->inter_t) ? tmp_t : ray->inter_t;
tmp_t = INFINITY;
}
obj = obj->next;
}
if (calculate_light && ray->inter_t != INFINITY)
{
phong_shading(ray);
if (ray->closest->reflection > 0.0 && recursivity > 0)
{
calculate_reflected(ray, &reflected);
throw_ray(&reflected, 1, ray->closest, recursivity - 1);
ray->color.red *= (1 - ray->closest->reflection);
ray->color.green *= (1 - ray->closest->reflection);
ray->color.blue *= (1 - ray->closest->reflection);
if (reflected.closest)
ray->color.r += ray->closest->reflection * reflected.color.r;
ray->color.g += ray->closest->reflection * reflected.color.g;
ray->color.b += ray->closest->reflection * reflected.color.b;
}
}
}
