2D jump

Unity Engine
1

I’m new here…so if I do something wrong…I’ m sorry. I tried to make a 2d platform game, and i write the code for movement+jump, but my character dosent jump…Can somebodie figure out this code?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    private Rigidbody2D myRigidbody;
    [SerializeField]
    public float speed = 12.0f;
    private bool facingRight;
    private bool facingLeft;

    [SerializeField]
    private Transform[] groundPoints;

    private float groundRadius;

    private LayerMask whatIsGround;

    private bool isGrounded;

    private bool jump;

    private float jumpForce;
    // Use this for initialization
    void Start() {
        facingRight = true;
        myRigidbody = GetComponent<Rigidbody2D>();
    }


    // Update is called once per frame
    void Update()
    {
        float horizontal = Input.GetAxis("Horizontal") * speed;

        isGrounded = IsGrounded();

        Debug.Log(jump);
        HandleMovement(horizontal);

        Flip(horizontal);
    }
    private void HandleMovement(float horizontal)
    {
      
        myRigidbody.velocity = new Vector2(horizontal , myRigidbody.velocity.y); // X = - 1 , y = 0 ;

        if(isGrounded && jump)
        {
            isGrounded = false;
            myRigidbody.AddForce(new Vector2(0, jumpForce));
        }
        if(Input.GetKeyDown(KeyCode.Space))
        {
            jump = true;
        }
    }
    private void Flip(float horizontal)
    {
        if(horizontal > 0 && !facingRight || horizontal < 0 && facingRight)
        {
            facingRight = !facingRight;

            Vector3 theScale = transform.localScale;

            theScale.x *= -1;
            transform.localScale = theScale;
        }
    }
    private bool IsGrounded()
    {
        if (myRigidbody.velocity.y <= 0)
        {
            foreach (Transform point in groundPoints)
                {
                Collider2D[] colliders = Physics2D.OverlapCircleAll(point.position, groundRadius, whatIsGround);

                for (int i = 0; i < colliders.Length; i ++)
                {
                    if(colliders[i].gameObject !=gameObject)
                    {
                        return true;
                    }
                }
                }
        }
        return false;
    }
}
2

Just glancing through the code, I’d recommend two things to check.

  1. put some debug statements inside IsGrounded() to make sure that’s actually returning true when grounded.
  2. where are you setting jumpForce? That number is always hard to get right. Odds are it needs to be in the 100’s, but what it actually should be depends on all sorts of other settings. If that number is too small, you may just not be seeing the thing move, even though you are applying the force.

You could also check out this tutorial for guidance:

or look at this list for more info: Learn game development w/ Unity | Courses & tutorials in game design, VR, AR, & Real-time 3D | Unity Learn

-GDB

3

jumpForce is zero, set a value and should work