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Question by thenachotech1113 · Oct 27, 2013 at 03:57 AM · collisioncolliderarraystructure

setting a transform var to an object that collided

I just want the object to identify surrounding objects inside a collider and i thought of this script (C Sharp) to do so:

 using UnityEngine;
 using System.Collections;
 
 public class generatorScript : MonoBehaviour {
 
     Transform structureLink;
     
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
         
     }
     
     void OnCollisionEnter (Collision[] hit) {
         for (int i = 0; i < hit.Length; i++){
             if (hit[i].transform.tag =="structure"){
                 
                 structureLink = hit[i].transform;
                 
             }
         }
         
     }
     
 }

anyway there is a warning that says: Assets/generatorScript.cs(6,19): warning CS0414: The private field `generatorScript.structureLink' is assigned but its value is never used

and an error that says:Script error: OnCollisionEnter This message parameter has to be of type: Collision The message will be ignored.

any help is much apriciated thank you

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Answer by robertbu · Oct 27, 2013 at 04:29 AM

OnCollisionEnter() has a collision as a parameter, not an array of collisions. If your object first collides with multiple object in a single frame, you will get multipe OnCollisionEnter() calls during that frame, one for each object you collided with. A collision has the transform of the object you collided with.

 void OnCollisionEnter (Collision collision) {
         if (collision.transform.name  =="structure"){
              structureLink = collision.transform;
        }
    }
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avatar image thenachotech1113 · Oct 27, 2013 at 04:54 PM 0
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oh, thank you, this was realy helpfull.

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