Player jumps higher than what it's supposed to jump

Unity Engine
,
1

so im working on jumping for my game, and for some reason when i press space at the right velocity while it’s falling, the player jumps higher than what it’s supposed to jump, can somebody tell me how and why?

here’s the code

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    #region Variables

        #region Movement
        [Header("Movement")]
        public float acceleration;
        public float maxSpeed;
        public float deceleration; // will be used later
        #endregion

        #region Components
        [Header("Components")]
        Rigidbody2D rb;
        BoxCollider2D coll;
        #endregion

        #region Jump
        [Header("Jump")]
        public float jumpHeight;
        #endregion

        #region Gravity
        [Header("Gravity")]
        public float gravityScale;
        public float fallGravityScale;
        #endregion

        #region Collision
        [Header("Collision")]
        public Vector2 boxSize;
        public float boxDistance;
        public LayerMask groundLayer;
        #endregion

    #endregion

    private void Awake() {
        rb = GetComponent<Rigidbody2D>();
        coll = GetComponent<BoxCollider2D>();
    }
    void Update() {
        Movement();
        Jump();
    }

    #region Movement Code

    void Movement()
    {
        float horizontal = Input.GetAxis("Horizontal");
        Vector2 direction = new(horizontal, 0);
        rb.AddForce(acceleration * direction, ForceMode2D.Force);

        if (rb.velocity.magnitude <= maxSpeed)
        {
            return;
        }
        rb.velocity = Vector2.ClampMagnitude(rb.velocity, maxSpeed);
    } 

    void Jump(){
        if(Input.GetKeyDown(KeyCode.Space) && IsGrounded()){
            float jumpForce = Mathf.Sqrt(jumpHeight * (Physics2D.gravity.y * rb.gravityScale) * -2);
            rb.AddForce(Vector2.up * jumpForce, ForceMode2D.Impulse);
        }
        if(rb.velocity.y >= 0){
            rb.gravityScale = gravityScale;
        }
        else{
            rb.gravityScale = fallGravityScale;
        }
    }

    #endregion
   

    private bool IsGrounded(){
        return Physics2D.BoxCast(transform.position,boxSize,0f,-transform.up,boxDistance,collisionLayer);
    }
    private void OnDrawGizmos() {
        Gizmos.color = Color.green;
        Gizmos.DrawWireCube(transform.position-transform.up*boxDistance,boxSize);
    }
}
2

The above is just code and doesn’t explain what “higher than what it’s supposed to” means.

Also, just checking that you’re aware that physics doesn’t run per-frame unless you ask it to so whatever you do per-frame won’t actually be used until it runs during the FixedUpdate. Adding a force as you do makes that frame-rate dependent.

// This is frame-rate dependent.
rb.AddForce(acceleration * direction, ForceMode2D.Force);

Using a reference to a BoxCollider2D then reading out its properties and then passing those to a BoxCast is crazy but it’s shown in so many terrible tutorials so that’s likely the reason. If you have a reference to ANY collider then you can perform Collider2D.Cast without knowing anything about the collider, it’s position etc. Note that the Collider is NOT at Transform.position, that’s the Transform, not the Rigidbody2D position and will not be correct if you’re using interpolation. Also note, there’s Rigidbody2D.Cast too.

3

ues

4

?