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Question by BilboStabbins · Oct 03, 2012 at 02:39 PM · directionlookatfacingtransformdirection

How to check in which direction an object is facing?

Hi,

I want to be able to check whether an object is looking at another object. Any ideas on how to do this would be great.

Thanks

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Answer by Griffo · Oct 03, 2012 at 04:09 PM

Use something like below, where on the global script the var rayCastHitName holds the result of the ray cast.

 private var globalVars : GameObject;    // Referance to the GameObject with the GlobalVars on
 private var hit : RaycastHit;

 function Awake(){
 
     globalVars = GameObject.Find("Global Vars");    // Find the gameObject with the GlobalVars.js attached to it
 }
 
 function Update(){

 if (Physics.Raycast (transform.position,transform.forward,hit, 10)) {
        globalVars.GetComponent(GlobalVars).rayCastHitTag = hit.collider.gameObject.tag;
     }
 }
 
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avatar image BilboStabbins · Oct 08, 2012 at 01:38 PM 0
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Working great - Thanks! :)

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Answer by Griffo · Oct 03, 2012 at 02:44 PM

Use a ray cast http://docs.unity3d.com/Documentation/ScriptReference/Physics.Raycast.html then check to see if it hits the player

 if(hit.collider.gameObject.tag == "Player"){
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avatar image Griffo · Oct 03, 2012 at 02:48 PM 0
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Or use print to see what its hitting

 print("Can not see you " + hit.collider.gameObject.name + " in the way");
avatar image BilboStabbins · Oct 03, 2012 at 02:52 PM 0
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Thanks for the reply, Griffo.

Well the objects I'm using don't have colliders and are simply Transforms. I was wondering if there's possibly a way this could be achieved using something similar to;

if(obj1.TransformDirection(obj2.position) == true)

avatar image Griffo · Oct 03, 2012 at 02:57 PM 0
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Why not just put a simple box collider around them ?

avatar image BilboStabbins · Oct 03, 2012 at 03:48 PM 0
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Great - I think I'll use this method then and add the colliders onto the objects. $$anonymous$$y other question is, do you know how to project a ray from an object that isn't the object the script is attached to? I have it stored in a global variable so have access to it already. Then be able to use the line you have above: if(hit.collider.gameObject.tag == "Player")

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