Player Bounces Down Hills

Hi so my player bounces down hills i use rigid body and my movement script i am still pretty new so the simpler the better heres my code TIA

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PlayerMovement : MonoBehaviour {
6.     Rigidbody2D rb;
7.  
8.     [SerializeField] private float runSpeed = 5f;
9.     [SerializeField] private float fallMultiplier = 2.5f;
10.     [SerializeField] private float lowJumpMultiplier = 2f;
11.  
12.     float horizontalMove;
13.     bool isGrounded;
14.  
15.  
16.    // Use this for initialization
17.    void Start ()
18.     {
19.         rb = GetComponent<Rigidbody2D>();
20.    }
21.  
22.     private void OnCollisionStay2D(Collision2D collision)
23.     {
24.         isGrounded = true;
25.         rb.gravityScale = 0;
26.     }
27.  
28.     private void OnCollisionExit2D(Collision2D other)
29.     {
30.         rb.gravityScale = 3.5f;
31.     }
32.  
33.     // Update is called once per frame
34.     private void Update()
35.     {
36.  
37.         horizontalMove = Input.GetAxisRaw("Horizontal") * runSpeed;
38.  
39.         if (Input.GetButtonDown("Jump") && isGrounded)
40.         {
41.             rb.AddForce(Vector3.up * 25, ForceMode2D.Impulse);
42.         }
43.  
44.         if (Input.GetButton("Sprint") && horizontalMove >= 1)
45.         {
46.             horizontalMove += 10;
47.         }
48.  
49.         else if (Input.GetButton("Sprint") && horizontalMove <= -1)
50.         {
51.             horizontalMove -= 10;
52.         }
53.  
54.     }
55.  
56.     private void FixedUpdate()
57.     {
58.         transform.Translate(horizontalMove * Time.fixedDeltaTime, 0, 0);
59.  
60.         if (rb.velocity.y < 0)
61.         {
62.             isGrounded = false;
63.             rb.AddForce(Vector2.up * Physics2D.gravity.y * (fallMultiplier - 1) * Time.fixedDeltaTime, ForceMode2D.Impulse);
64.         }
65.         else if (rb.velocity.y > 0 && !Input.GetButton("Jump"))
66.         {
67.             isGrounded = false;
68.             rb.AddForce(Vector2.up * Physics2D.gravity.y * (lowJumpMultiplier - 1) * Time.fixedDeltaTime, ForceMode2D.Impulse);
69.         }
70.  
71.     }
72.  
73. }

 

Hi, why wouldn't you edit your post to use code tags?

Anyway, I'll take a guess without reading the code.

As you are using RigidBodies and Physics, there simply isn't magical down force, that would keep your character grounded.

You move fast enough sideways, and it will be larger displacement sideways than what gravity will have in vertical direction, so you end up floating in mid air for a while. Then this repeats, as you go down hill.

 

Unity built-in rigidbody physics aren't quite easy to use when it comes to this type of behaviour (In fact, it's a total pain let's admit it)

Check this tutorial, it helped me a lot. (there is multiple episodes)

 

@eses done i didnt even know about them new to the forums thanks!