1

Hey, Forgive me if I don’t use proper terminology or if this is an extremely simple problem, I’m very new @ C# & Unity.

So, I’m trying to make a script, were my Object cannot jump unless it is currently touching the ground, I’m fairly sure I’ve gone about it in a round-about way, but non the less I feel the solution I came up with, should be working.

The problem is, my “OnColliderEnter(Collider other)” (on line 49-55) which I based off the “OnTriggerEnter” from the Roll a Ball Unity tutorial, does not seem to be registering, when my Object lands back on the ground.

Below, I will post my Script.

using UnityEngine;
using System.Collections;

public class playerMovement : MonoBehaviour
{
    public float speed2D;
    public float speed3D;
    public float jumpSpeed;
    private bool jump;
    private int jumpAllower;
    

    void Start()
    {
        jumpAllower = 1;
    }

    void Update()
    {

        jump = Input.GetKeyDown(KeyCode.Space);
    
 
        float moveHorizontal = Input.GetAxis("Horizontal");
        

        

        Vector3 movement2D = new Vector3(0.0f, moveHorizontal, 0.0f);
        Vector3 jumpSize = new Vector3(0.0f, 0.0f , -1.0f);


       gameObject.transform.Translate ((movement2D * speed2D) *Time.deltaTime);
    
             
       if (jumpAllower == 1)
        {
            Debug.Log("Jump Possible");
            if (jump == true)
                {
                Debug.Log("I jumped");
                gameObject.transform.Translate(jumpSize * jumpSpeed * Time.deltaTime);
                jumpAllower = 0;
                }
        }
        

    }
    void OnColliderEnter (Collider other)
    {
        if (other.gameObject.CompareTag("Ground"))
        {
            jumpAllower = 1;
        }
    }
}

if anyone could tell me how to get the OnColliderEnter to work, OR, the correct way to do this (or both!) that would be amazing.

Thank you!

2

I suggest that you still use OnTriggerEnter for this. I don’t have too much experience with Unity myself, but I’ve never gotten OnColliderEnter to work properly over triggers. Also make sure to set the ground as a trigger (found in the collider components), or else this won’t work.

Here’s an example of the fixed script (just that function):

     void OnTriggerEnter (Collider other)      //Changed to OnTriggerEnter
     {
         if (other.gameObject.tag ("Ground"))  //other.gameObject.tag usually   
                                                                            //works fine
         {
             jumpAllower = true;  //Remember that booleans are useful for things like this. I would redefine this variable as a boolean (use "bool" instead of "int," unless you plan on having more than two options.
         }
     }

Everything else looks fine.

3

OnTriggerEnter and OnCollisionEnter uses different classes.

OnCollisionEnter uses the Collision class.

OnTriggerEnter uses the Collider class.

So change “Collider other” to “Collision other”! :slight_smile: