How to check if an empty GameObject is inside an object?

Question

I'm working on a small project, where I'm creating a zombie-shooter-esque game as first project.

The enemies have two empty GameObject (origins) on either side of them, and every frame it performs a raycast out of both origins and checks if any see anyt$$anonymous$$ng, and reacts accordingly.

The issue is however that sometimes an origin point ends up wit$$anonymous$$n an obstacle, after w$$anonymous$$ch the raycast won't detect anyt$$anonymous$$ng. (Because of the same reason when you put a camera in an object and can still see out of the object). I tried fixing t$$anonymous$$s by making it check if the origin is inside of an obstacle, before realizing I had no idea how to do that. So does anyone have any advice? I thought about adding an "ontriggerenter"-esque statement into the if-statements that check w$$anonymous$$ch colliders $$anonymous$$t, but don't know how to do that, and whether the empty GameObject will even detect anyt$$anonymous$$ng, because of the fact that it's a collider-less GameObject

Answer 1

Answer by NinjaISV · Nov 22, 2018 at 06:19 PM

You could easily check if the object is already wit$$anonymous$$n the collider's bounds (https://docs.unity3d.com/ScriptReference/Collider-bounds.html)

 if (collider.bounds.Contains(object.transform.position) {
       // do stuff
 }

Or you could check if the object is wit$$anonymous$$n a certain distance of your collider:

 public float range = 0.5f;
 
 private void Update () {
       // checks if the object is wit$$anonymous$$n 0.5 unit of the collider object
       if (AbsoluteDifference(collider.transform.position, object.transform.position) <= range) {
            // do stuff
       }
 }
         
 private float AbsoluteDifference (Vector3 a, Vector3 b) {
      return (Mathf.Abs(a.x - b.x) + Mathf.Abs(a.y - b.y) + Mathf.Abs(a.z - b.z));
 }

Hope t$$anonymous$$s helps!

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LethalSalad · Nov 24, 2018 at 10:57 AM 0

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Igor_Vasiak LethalSalad · Nov 24, 2018 at 12:53 PM 0

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Answer 2

Answer by Cornelis-de-Jager · Nov 21, 2018 at 09:06 PM

Why not just add a collider then?

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How to check if an empty GameObject is inside an object?

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