void sphere_texturing(t_obj *obj, t_3d_pos *ray,
double alpha, t_mat *mat)
{
double x;
double y;
int height;
int width;
t_3d_pos hit;
x = alpha;
if (obj->sphe.texture != NULL)
{
hit = find_hit(alpha, &ray[0], &ray[1]);
height = (obj->sphe.texture->clipable.clip_height) * obj->sphe.y_repeat;
width = (obj->sphe.texture->clipable.clip_width) * obj->sphe.x_repeat;
x = width * (0.5 - (atan2(hit.z - CZ, hit.x - CX) / M_PI));
y = height * (0.5 - (asin((hit.y - CY) / obj->sphe.rad) / M_PI));
mat->color.full = get_texture_color(obj->sphe.texture, x, y);
}
}
int add_hit(struct hitlist *hl, long label)
{
struct hit_entry *he;
he = find_hit(hl, label);
if (he)
{
/* found in list, increase counter */
he->freq++;
/* keep list in order, higher frequencies are in the beginning. */
while (he->prev)
if (he->prev->freq < he->freq)
he = hit_swapwprev(hl, he);
else
break;
}
else
{
he = malloc(sizeof(struct hit_entry));
if (he == NULL)
{
ERROR(ERR_NOMEM);
return 0;
}
/* add to end of list */
he->next = NULL;
he->prev = hl->tail;
he->label = label;
he->freq = 1;
hl->tail = he;
if (he->prev)
he->prev->next = he;
else
hl->head = he;
hl->entries++;
}
return he->freq;
}
