static void load_intersect(bool base, bool out, float dist,
t_vertex const *ray, t_intersect *intersect)
{
intersect->dist = dist;
intersect->pos = VEC3_ADD(ray->pos, VEC3_MUL1(ray->dir, dist));
if (base)
intersect->norm = VEC3(0, 0, 1.f);
else
intersect->norm = ft_vec3norm(VEC3_Z(intersect->pos, -intersect->pos.z));
if (out)
intersect->norm = VEC3_SUB(VEC3_0(), intersect->norm);
if (base)
intersect->tex = VEC2(intersect->pos.x, intersect->pos.y);
else
intersect->tex = VEC2(intersect->norm.z, intersect->norm.y / 2.f + 0.5f);
}
void CamGetRay(const struct Camera *cam, const double *screen_uv,
double time, struct Ray *ray)
{
const struct Transform *transform_interp = get_interpolated_transform(cam, time);
double target[3] = {0, 0, 0};
double eye[3] = {0, 0, 0};
compute_ray_target(cam, screen_uv, target);
XfmTransformPoint(transform_interp, target);
XfmTransformPoint(transform_interp, eye);
VEC3_SUB(ray->dir, target, eye);
VEC3_NORMALIZE(ray->dir);
VEC3_COPY(ray->orig, eye);
ray->tmin = cam->znear;
ray->tmax = cam->zfar;
}