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Question by hardmode2236 · Apr 28, 2013 at 01:54 AM · c#raycastcomponentraycasthit

c# editing gameobject returned by a raycast

Im fairly new to scripting and Im still learning the basics. I have a basic first person character controller, and some game objects in my scene. So far what i can do its run a round and cast a ray from my character. id like to be able to modify the object that the ray returns.

say if the tree i clicked on had a script with a "fallDown" function or somthing, is there a way i can call that from the 'hit' variable that my raycast returned into?

 using UnityEngine;
 using System.Collections;
 
 public class AimScript : MonoBehaviour {[[
     
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () 
     {
         var ray = new Ray (transform.position, transform.forward);
         Debug.DrawRay (ray.origin, ray.direction * 10, Color.red);//test
         RaycastHit hit;
         
         if(Input.GetButtonDown ("Fire1") && hit.distance <= 6)
         {
             // somthing like:
             // if( hit has TreeScript component )
             // run TreeScript's falldown function.
             
         }
         
     }
 }

any help would be much appreciated.

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Answer by whydoidoit · Apr 28, 2013 at 06:46 AM

Your easiest method is:

   hit.collider.SendMessage("DoSomeFunction", anOptionalParameter, SendMessageOptions.DontRequireReceiver);

or

   hit.collider.SendMessage("DoSomeFunction", SendMessageOptions.DontRequireReceiver);


Which will call DoSomeFunction on any script attached to the object that has one. You can also BroadcastMessage to include children or SendMessageUpwards to include parents.

You can look for a specific script using GetComponent

       var someScript = hit.collider.GetComponent<SomeScript>();
       if(someScript != null) 
           someScript.DoSomeFunction(with, some, parameters);
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avatar image hardmode2236 · Apr 28, 2013 at 03:08 PM 0
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Thank you very much!

avatar image hardmode2236 · Apr 28, 2013 at 04:28 PM 0
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how would i setup that 'anOptionalParameter' in the scripts 'DoSomeFunction' function

im trying to pass a vector 3 through that message and setting up like this:

 function interact(var newDir : Vector3)

but that isnt working.

-edit never$$anonymous$$d i figured it out

-edit never$$anonymous$$d again, i didnt figure it out

-edit NEVER$$anonymous$$IND AGAIN, ok this time i really figured it out!

avatar image whydoidoit · Apr 28, 2013 at 05:05 PM 0
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Glad to hear it :)

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