t_bool plane_intersection(t_ray *r, t_sphere *s, t_f64 *t0, t_f64 *t1)
{
t_f64 denom;
t_vec3f v_n;
t_vec3f c;
t_vec3f f;
v_n = normal_vec3f(&s->pos);
denom = dot_vec3f(&v_n, &r->dir);
if (denom > 1e-6)
{
f = sub_vec3f(&s->pos, &r->origin);
*t1 = dot_vec3f(&f, &v_n) / denom;
*t0 = *t1;
c = scale_vec3f(&r->dir, *t0);
c = add_vec3f(&c, &r->origin);
if (!((c.x > s->pos.x) && (c.x < (s->pos.x + 10))))
return (FALSE);
if (!((c.y > s->pos.y) && (c.y < (s->pos.y + 10))))
return (FALSE);
if (!((c.x > s->pos.z) && (c.y < (s->pos.y + 10))))
return (FALSE);
return (*t0 >= 0);
}
return (FALSE);
}
void cast_ray(int x, int y, t_vec3f *pixel, t_interface *env)
{
t_vec3f dir;
t_ray ray;
t_f64 xx;
t_f64 yy;
xx = (2 * ((x + 0.5) * (1.0 / WIDTH)) - 1) * env->camera.angle * ARATIO;
yy = (1 - 2 * ((y + 0.5) * (1.0 / HEIGHT))) * env->camera.angle;
dir = new_vec3f(xx, yy, 0);
dir = add_vec3f(&dir, &env->camera.up);
ray = new_ray(env->camera.pos, normal_vec3f(&dir));
*pixel = trace_ray(&ray, env->objects, 0);
}
