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Question by MGMaddMann · Sep 04, 2014 at 12:33 PM · collisioncharacterdirectionnot workingtag

Make the character move a certain direction on collision

Hi there, I am trying to make my character move in the positive y direction when it collides with an object, in this case the wall.

For some reason this does not work at all, even the debug.log doesn't print out. How do I make this work?

I am relatively new to javascript coding and so I'm sorry if it is a really easy thing to fix.

Code sample below:

 function OnCollisionEnter (collision : Collision) {
 if (collision.gameObject.tag == "Wall" && Input.GetKey(KeyCode.LeftControl)) {
             
 Debug.Log("Collided");
 var pushDir = Vector3 (0, 1, 0);
         
 gameObject.rigidbody.velocity = pushDir;
 }
 }
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Answer by Stormizin · Sep 04, 2014 at 12:34 PM

Did you attached a Rigidbody to the object that collide with the wall?

The object need a Rigidbody and the wall a collider when both enter in the trigger then the action start.

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avatar image MGMaddMann · Sep 04, 2014 at 04:36 PM 0
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I tried that, but I can't get the character to move if it has a rigidbody, so I changed the line of code for the direction of movement to: gameObject.transform.forward = pushDir;

But that still doesn't work

avatar image Addyarb · Sep 04, 2014 at 08:09 PM 0
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Try gameObject.rigidbody.velocity.y = pushDir; With the rigidbody, of course.

avatar image Landern · Sep 04, 2014 at 08:12 PM 0
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Try gameObject.rigidbody.velocity.y = pushDir; With the rigidbody, of course.

@Addyarb, pushDir is of type Vector3, gameObject.rigidbody.velocity.y is of type float, this will end in $$anonymous$$rs.

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Answer by Addyarb · Sep 04, 2014 at 08:29 PM

Here you go, it's in C#. I tested with a character that has a rigidbody controller and it works well.

 using UnityEngine;
 using System.Collections;
 
 public class pushBack : MonoBehaviour {
     public int pushDir = 10;
     public int pushBackSpeed = 1;
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void Update () {
         
     }
     void OnCollisionEnter (Collision collision) {
         if (collision.gameObject.tag == "Wall" ) {
             
             Debug.Log("Collided");
             
             transform.position = transform.position +
                 transform.forward * -1 * pushBackSpeed;
             //gameObject.rigidbody.velocity.y = pushDir;
         }
     }
 }
 
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avatar image MGMaddMann · Sep 05, 2014 at 06:48 AM 0
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Just tried this and for some reason it doesn't seem to work

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