Why can't I jump after my character touches a Rigidbody

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I'm new to unity and while playing around with the editor, I noticed that my ability to jump disappeared after i touched another object with it's own rigidbody and was only activated after i touched something else besides the floor. I checked online and it looks like there are only solutions for Unity 2D so I came here.
Here is my code
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Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class Player : MonoBehaviour
7. {
8.  
9.     private bool jump;
10.     private bool groundCheck;
11.     private float h;
12.     private float v;
13.     private Rigidbody rb;
14.  
15.  
16.     void Start()
17.     {
18.         rb = GetComponent<Rigidbody>();
19.     }
20.  
21.     void Update()
22.     {
23.         if (Input.GetKeyDown(KeyCode.Space))
24.         {
25.             jump = true;
26.            
27.         }
28.         h = Input.GetAxis("Horizontal");
29.         v = Input.GetAxis("Vertical");
30.     }
31.     void FixedUpdate()
32.     {
33.  
34.         rb.velocity = new Vector3(h * 10, rb.velocity.y, v * 10);
35.  
36.         if (!groundCheck)
37.         {
38.             return;
39.         }
40.         if (jump)
41.         {
42.             rb.AddForce(Vector3.up * 8, ForceMode.Impulse);
43.             jump = false;
44.         }
45.        
46.        
47.        
48.        
49.  
50.      }
51.     private void OnCollisionEnter(Collision collision)
52.     {
53.         groundCheck = true;
54.     }
55.  
56.     private void OnCollisionExit(Collision collision)
57.     {
58.         groundCheck = false;
59.     }
60.    
61.  
62. }
63.  

 

I'm assuming it's because your ground check is not verifying if it's a ground object and you're just saying false on every exit.
Tag your ground and then in your ground checks do something like this:

Code (CSharp):

1.  private bool groundCheck => groundCollisions >= 0;
2.     private int groundCollisions;
3.  
4.     private void OnCollisionEnter(Collision collision) {
5.         if (collision.transform.CompareTag("Ground")) groundCollisions++;
6.     }
7.  
8.     private void OnCollisionExit(Collision collision)
9.     {
10.         if (collision.transform.CompareTag("Ground")) groundCollisions--;
11.     }

 

It fixed the problem but I can now jump infinitely. I'm sure i can find something out to fix that though. Thanks.

 

Never mind I fixed it by changing the 0 that groundCollision was >= to a 1 and it works now. Thanks for the help.

 

Ahhh, yes. That was my mistake. Glad it helped you