entity_t *closest(scene_t *scene, point_t base, vector_t unitDir,
entity_t *self, hitinfo_t *hit) {
// set up iterator for sobjList and create sentinel value for
// min distance
iterator_t *iter = createIterator(scene->sobjList);
entity_t *temp = list_getnext(iter);
// set sentinel value
hit->distance = 9999;
sobj_t *sobj = NULL;
entity_t *closest = NULL;
// temporary hit info
hitinfo_t tempHit;
// loop through the entire sobjList
while (temp != NULL) {
sobj = ((sobj_t*)temp->entDerived);
/* if we have a hit, check the min distance
* if the mindistance previously calculated is
* greater, then set the new min distance
* and set the entity to the closest entity
*/
if (sobj->hits(temp, base, unitDir, &tempHit) == 1) {
if (hit->distance > tempHit.distance
|| hit->distance == 9999) {
hit->distance = tempHit.distance;
closest = temp;
}
}
temp = list_getnext(iter);
}
return closest;
}
//
// Restituisce l'elemento alla posizione specificata
//
void *list_getelementat(t_list *list, int index)
{
if (list == NULL || index < 0)
return NULL;
void *item = NULL;
t_iterator *iter = list_getiterator(list);
while (index-- >= 0)
item = list_getnext(iter);
return item;
}
//
// restituisce il numero di elementi presenti nella lista
//
size_t list_getsize(t_list *list){
void *item = NULL;
size_t c = 0;
t_iterator *iter = list_getiterator(list);
while ((item = list_getnext(iter)) != NULL)
{
c++;
}
return c;
}
