void OnTriggerEnter2D(Collider2D coll)
{
Hero hero = coll.GetComponent <Hero>();
//Triggers shall not pass!
if (coll.isTrigger)
{
return;
}
//only heroes must have the aligner script
if (hero != null)
{
//prevent from running the same code two times (because the hero have 2 colliders)
if (!_heroesInside.Contains(hero))
{
_heroesInside.Add(hero);
AlignWithAttractorPoint alignScript = coll.GetComponent <AlignWithAttractorPoint>();
if (alignScript == null)
{
alignScript = coll.gameObject.AddComponent <AlignWithAttractorPoint>();
}
alignScript.AddPoint(transform);
//hero has not the ability to walk on the planet
if (hero.GetComponent <HeroPlanetController>() == null)
{
//disable existing script controller and add the custom one
hero.GetComponent <HeroController>().enabled = false;
hero.gameObject.AddComponent <HeroPlanetController>();
}
}
}
//all other objects are saved in a dictionary to handle their gravity when they enter inside an effector area
else
{
//for objects entered for the first time
if (!_affectedObjects.ContainsKey(coll))
{
//create an entry in the dictionary and save its original gravity scale
_affectedObjects.Add(coll, new Pair <float, int>(coll.attachedRigidbody.gravityScale, 1));
//then set the gravity scale to 0.
coll.attachedRigidbody.gravityScale = 0;
}
//for objects who are already under other effector areas, just increase the counter
else
{
_affectedObjects[coll].Second += 1;
}
}
}
void OnTriggerExit2D(Collider2D coll)
{
Hero hero = coll.GetComponent <Hero>();
//Triggers shall not pass!
if (coll.isTrigger)
{
return;
}
//only heroes must have the aligner script
if (hero != null)
{
//prevent from running the same code two times (because the hero have 2 colliders)
if (_heroesInside.Contains(hero))
{
_heroesInside.Remove(hero);
AlignWithAttractorPoint alignScript = coll.GetComponent <AlignWithAttractorPoint>();
if (alignScript != null)
{
//hero is about to exit the last area
if (alignScript.Count == 1)
{
//disable existing script controller and add the custom one
Destroy(hero.GetComponent <HeroPlanetController>());
hero.GetComponent <HeroController>().enabled = true;
}
alignScript.RemovePoint(transform);
}
}
}
//if an object was under effect of an area effector
else if (_affectedObjects.ContainsKey(coll))
{
//decrease the area counter
_affectedObjects[coll].Second -= 1;
//the object is no more influenced by gravity areas
if (_affectedObjects[coll].Second == 0)
{
//set its original gravity scale and remove it from the list
coll.attachedRigidbody.gravityScale = _affectedObjects[coll].First;
_affectedObjects.Remove(coll);
}
}
}