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Question by Gusic · Feb 17, 2014 at 04:15 PM · c#2dcollisiongameobjectdestroy

Simple on Collision Help (C#)

Hi Guys, I think i have a very simple problem. Basically i want a collision script. So when my player touches the spikes he dies. i have made a script but it just wont work, i am a beginner by the way. Please it would be nice if you help.

Thank You

 using UnityEngine;
 using System.Collections;
 
 public class PlayerDie : MonoBehaviour {
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     
     
     }
     void OnCollisionEnter(Collision collision){
         if (collision.gameObject.name == "Spikes") {
             Destroy(collision.gameObject);        
         }
     }
 }
 
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avatar image Sundar · Feb 17, 2014 at 05:52 PM 0
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Debug to check whether collision actually happens like

 void OnCollisionEnter(Collision collision)
 {
     Debug.Log(collision.gameObject.name);
     if (collision.gameObject.name == "Spikes") {
     Destroy(collision.gameObject);
     }
 }

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Answer by clunk47 · Feb 17, 2014 at 06:54 PM

Looks like you're using Rigidbody2D. For some reason w/ the 2D stuff, I can only get collisions to work correctly if both objects included have Collider2D AND Rigidbody2D. You also need to use OnCollisionEnter2D, not OnCollisionEnter.

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avatar image Gusic · Feb 17, 2014 at 07:05 PM 0
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YES!! it worked thank you. i just need to respawn the player now.

avatar image poncho · Feb 17, 2014 at 07:12 PM 1
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thanks for the heads up, i have not done anything with Unity on 2D framework, but good to know it before. Gusic, mark this question as the answer

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Answer by poncho · Feb 17, 2014 at 05:35 PM

I am not sure from this code that if the player is the one with the PlayerDie Script, or if the spikes have the script, since the collision is expecting to be against "Spikes", i will asume that the player has the script, then collission.gameobject will be the spikes, meaning that if the player collides with the spikes the object to be destroyed would be the spikes, if you would want the player to be destroyed use Destroy(gameObject); in case the script is attached to the player

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avatar image Gusic · Feb 17, 2014 at 05:37 PM 0
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i changed it to gameObject but it still wont be destroyed(the player) i have attached the script to the player, so when the player hits the spikes he dies.

avatar image poncho · Feb 17, 2014 at 05:40 PM 0
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make sure both gameobjects have colliders and are not nriggers

avatar image iAmAwsum poncho · Feb 14, 2016 at 10:58 AM 0
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THAN$$anonymous$$ YOU! I had is trigger on my obstacle and you finally fixed it! :D

avatar image Gusic · Feb 17, 2014 at 05:43 PM 0
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it still doesnt work the player still doesnt get destroyed.

avatar image whydoidoit · Feb 17, 2014 at 06:02 PM 0
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$$anonymous$$ake sure the thing with the script has a rigidbody attached. Also see this: http://unitygems.com/gotchas

avatar image Gusic · Feb 17, 2014 at 06:13 PM 0
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$$anonymous$$y player does have a rigid body. look http://gyazo.com/79ada36bd80c6aadeac581aeee18a3a9

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