How to make it so enemies only move towards the player when the player is colliding with an object

Question

It's more so when you touch an object with the tag "light" then any object with the tag "enemy" will become active and move towards the player.

 #pragma strict
 
 function Start () 
 {
     GetComponent("ENEMY").active = false;
 }
 
 function Update () 
 {
 
 }
 function OnCollisionEnter (collision : Collision)
 {
     while(collision.gameObject.tag == "light")
     {
         GetComponent("ENEMY").active = true; 
     }
     GetComponent("ENEMY").active = false;
 }

[1]: https://www.dropbox.com/s/cc925rfeclh444a/Screenshot%202013-12-05%2008.26.30.png

[2]: https://www.dropbox.com/s/cc925rfeclh444a/Screenshot%202013-12-05%2008.26.30.png

Answer 1

Answer by stevethorne · Dec 05, 2013 at 03:16 PM

First, you don't want to use a 'while' statement there. That will loop forever if the object is a 'light' object. Replace that 'while' with 'if' and get rid of the line 'GetComponent("ENEMY").active = false;'.

Second, you will need to have an OnCollisionExit function that disables the Enemies if you're leaving the light object. It will be the same as your OnCollisionEnter function, but you will set the active state to false.

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JackieKan · Dec 05, 2013 at 06:46 PM 0

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Like this? I forgot to mention I'm trying to make everything with the tag "enemy" active/inactive depending on the collision with "light".

 function Start () 
 {
     GetComponent("ENE$$anonymous$$Y").active = false;
 }
 
 function Update () 
 {
 
 }
 function OnCollisionEnter (collision : Collision)
 {
     if(collision.gameObject.tag == "light")
     {
         GetComponent("ENE$$anonymous$$Y").active = true; 
     }
 }
 function OnCollisionExit (collision : Collision)
 {
     if(collision.gameObject.tag == "light")
     {
         GetComponent("ENE$$anonymous$$Y").active = false; 
     }
 }

stevethorne · Dec 05, 2013 at 07:36 PM 0

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@Jackie$$anonymous$$an That looks about right, try that out and see if it does what you need it to.

JackieKan · Dec 06, 2013 at 01:46 PM 0

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I put it on the Player but nothing happened, no errors at least.

stevethorne · Dec 06, 2013 at 01:56 PM 0

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Are the light objects you're colliding with marked as Trigger colliders? If so you'll need to use the functions OnTriggerEnter and OnTriggerExit.

JackieKan · Dec 06, 2013 at 04:27 PM 0

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I tried making the light objects triggers:

 #pragma strict
 
 function Start () 
 {
     GetComponent(gameObject.tag == "enemy").active = false;
 }
 
 function Update () 
 {
 
 }
 function OnTriggerEnter (collision : Collision)
 {
     if(collision.gameObject.tag == "light")
     {
         GetComponent(gameObject.tag == "enemy").active = true; 
     }
 }
 function OnTriggerExit (collision : Collision)
 {
     if(collision.gameObject.tag == "light")
     {
         GetComponent(gameObject.tag == "enemy").active = false; 
     }
 }

Nothing happens, the enemy still starts activated and doesn't deactivate

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How to make it so enemies only move towards the player when the player is colliding with an object

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