How to change gravity scale in a script

Unity Engine
,
1

I want to change the gravity scale when I click the jump(space key)

    [SerializeField] private Rigidbody2D rb;
    [SerializeField] private Transform GFX;
    [SerializeField] private float jumpForce = 10f;
    [SerializeField] private LayerMask groundLayer;
    [SerializeField] private Transform feetPos;
    [SerializeField] private float groundDistance = 0.25f;
    [SerializeField] private float jumpTime = 0.3f;
    [SerializeField] private float gravity = 15f;
    //[SerializeField] private float crouchHeight = 0.2f;
    private bool isGrounded = false;
    private bool isJumping = false;
    private float jumpTimer;

    private void Update() {
        isGrounded = Physics2D.OverlapCircle(feetPos.position, groundDistance, groundLayer);

        if (isGrounded && Input.GetButtonDown("Jump")) {
            isJumping = true;
            jumpTimer = 0;
            rb.velocity = Vector2.up * jumpForce;
        }

        if (isJumping && Input.GetButton("Jump")) {
            if (jumpTimer < jumpTime) {
                rb.velocity = Vector2.up * jumpForce;
                jumpTimer += Time.deltaTime;
            } else {
                isJumping = false;
            }
        }

        if (Input.GetButtonUp("Jump")) {
            isJumping = false;
        }

*Code for the jump

2

What part are you struggling with?

The Unity documentation shows the location and spelling of the gravity scale property and it is used just like any other C# / Unity thing: you get a reference to the Rigidbody2D (which it looks like you already have) and use that.

Otherwise…

How to report your problem productively in the Unity3D forums:

http://plbm.com/?p=220

This is the bare minimum of information to report:

  • what you want
  • what you tried
  • what you expected to happen
  • what actually happened, log output, variable values, and especially any errors you see
  • links to actual Unity3D documentation you used to cross-check your work (CRITICAL!!!)
3

I wan tit so this value can be changed whenever I click a key, for example if I click the space key it will change the value to -3 but if I like the up arrow it will change the value to 15

9910443--1432227--Screenshot 2024-06-26 205216.png

4

Based on the above, the parts you will need are:

  • how to read and process input (such as the space key)
  • how to get a reference to the Rigidbody2D
  • how to set the .gravityScale field according to your desires.

This is a great approach when you first start out:

Imphenzia: How Did I Learn To Make Games: