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Question by Mz3D · Jul 14, 2012 at 11:34 AM · collidertriggerobject

Distinguish between two colliding objects

I need to distinguish the two objects of a collision. They are instances of the same prefab, so they have the same name, the same scripts components etc. But i need that when they collide the first one moves an x = +1 and the second one moves an x = -1. I wrote this code but it doesn't seem to affect the behaviour of the two instances:

 function OnTriggerStay (col : Collider){
 
  if ((col.gameObject.tag == "Enemy"){
 
  col.gameObject.transform.position += Vector3(1,0,0);
  gameObject.transform.position -= Vector3(1,0,0);
     }
 
 }

I need Unity to distinguish the collider object and the collided object and make the two move a bit in opposite directions. Can you help me?

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Answer by ScroodgeM · Jul 14, 2012 at 01:06 PM

if u use trigger, you can't get a collision point and normal to get direction, so you need to calc it based on other info, for example - let's take pivots of objects

  1. transform.position is [me]

  2. col.transform.position is [he]

  3. [he]-[me] is direction from [me] to [he], call it [dir]

  4. [dir].normalized is direction with length = 1, use it for calculations [dirNorm]

  5. move [me] away from [he] transform.position -= [dirNorm] * length;

  6. move [he] away from [me] col.transform.position += [dirNorm] * length;

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avatar image Mz3D · Jul 14, 2012 at 02:22 PM 0
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Thank you! it works great!

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