void inter_cyl(t_params *params, t_3d *vc, t_objs *cyl)
{
double a;
double b;
double c;
double delta;
translation_obj(cyl, cyl->trans[0], cyl->trans[1], cyl->trans[2]);
vc = rotate_ray(vc, cyl);
a = (pow(vc->x, 2.0) + pow(vc->y, 2.0));
b = 2.0 * (vc->x * (params->pos_eye[0] - cyl->pos[0]) + vc->y *
(params->pos_eye[1] - cyl->pos[1]));
c = (pow(params->pos_eye[0], 2.0) + pow(params->pos_eye[1], 2.0) +
(pow(cyl->pos[0], 2.0) + pow(cyl->pos[1], 2.0) - 2.0 *
(cyl->pos[0] * params->pos_eye[0] + cyl->pos[1] * params->pos_eye[1]) -
pow(cyl->ray, 2.0)));
delta = pow(b, 2.0) - (4.0 * a * c);
vc = unrotate_ray(vc, cyl);
translation_obj(cyl, -cyl->trans[0], -cyl->trans[1], -cyl->trans[2]);
if (delta < 0.0)
cyl->intersection.k = 0.0;
else if (delta == 0.0)
cyl->intersection.k = (-b) / (2.0 * a);
else
sub_int_k(&(cyl->intersection), b, delta, a);
}
static void move_light(t_data *d,
const t_bunny_position *mpos)
{
t_acc vec;
t_light *light;
t_pos *pos;
vec.z = 0;
if (!d->itfc.obj_click || !d->itfc.light_selected)
return ;
if (!d->itfc.move.needmoving)
{
d->itfc.move.first_pos = *mpos;
d->itfc.move.needmoving = true;
}
else
{
light = d->itfc.light_selected->datas;
pos = &light->pos;
d->itfc.move.second_pos = *mpos;
vec.x =
-((d->itfc.move.second_pos.x - d->itfc.move.first_pos.x) * 35);
vec.y =
-((d->itfc.move.second_pos.y - d->itfc.move.first_pos.y) * 35);
translation_obj(&d->rt.rotation, &vec,
&d->rt.eye.rot, pos);
d->itfc.move.first_pos = d->itfc.move.second_pos;
}
}
void inter_plan(t_params *params, t_3d *vc, t_objs *pl)
{
double test;
translation_obj(pl, pl->trans[0], pl->trans[1], pl->trans[2]);
vc = rotate_ray(vc, pl);
if (vc->x == 0.0 && vc->y == 0.0 && vc->z == 0.0)
pl->intersection.k = 0.0;
test = -(params->pos_eye[0] * pl->pos[0] + params->pos_eye[1]
* pl->pos[1] + params->pos_eye[2] *
pl->pos[2] + pl->ray) / (pl->pos[0] * vc->x +
pl->pos[1] * vc->y + pl->pos[2] * vc->z);
vc = unrotate_ray(vc, pl);
translation_obj(pl, -pl->trans[0], -pl->trans[1], -pl->trans[2]);
if (test < 0.0)
pl->intersection.k = 0.0;
else
pl->intersection.k = test;
}
void inter_sph(t_params *params, t_3d *vc, t_objs *sph)
{
double a;
double b;
double c;
double delta;
translation_obj(sph, sph->trans[0], sph->trans[1], sph->trans[2]);
vc = rotate_ray(vc, sph);
a = (pow(vc->x, 2.0) + pow(vc->y, 2.0) + pow(vc->z, 2.0));
b = 2.0 * (vc->x * (params->pos_eye[0] - sph->pos[0]) + vc->y *
(params->pos_eye[1] - sph->pos[1]) + vc->z * (params->pos_eye[2] -
sph->pos[2]));
c = SUPERCALC;
delta = pow(b, 2.0) - (4.0 * a * c);
vc = unrotate_ray(vc, sph);
translation_obj(sph, -sph->trans[0], -sph->trans[1], -sph->trans[2]);
if (delta < 0.0)
sph->intersection.k = 0.0;
else if (delta == 0.0)
sph->intersection.k = (-b) / (2.0 * a);
else
sub_int_k(&(sph->intersection), b, delta, a);
}
void inter_cone(t_params *params, t_3d *vc, t_objs *cone)
{
double q;
double a;
double b;
double c;
double delta;
translation_obj(cone, cone->trans[0], cone->trans[1], cone->trans[2]);
vc = rotate_ray(vc, cone);
q = tan(cone->ray * (M_PI / 180.0));
a = pow(vc->x, 2.0) + pow(vc->y, 2.0) - (q * pow(vc->z, 2.0));
b = SC_B;
c = SC_C;
delta = pow(b, 2.0) - (4.0 * a * c);
vc = unrotate_ray(vc, cone);
translation_obj(cone, -cone->trans[0], -cone->trans[1], -cone->trans[2]);
if (delta < 0.0)
cone->intersection.k = 0.0;
else if (delta == 0.0)
cone->intersection.k = (-b) / (2.0 * a);
else
sub_int_k(&(cone->intersection), b, delta, a);
}