How to create a Magnet Effect

Lazy man’s easy power up collecting

Magnet Effect for Powerups

In this article we created an Magnet Effect to collect power ups in our game when we press the C-key.

Pseudocode for the Magnet Effect Logic

Player script

if C is pressed
then find objects with tag powerup
enable magnet in Powerup script

Powerup script

if magnet is enabled
then move to player
else just keep moving downwards

Magnet Effect Code

Player Script

This code finds all objects with the tag powerup and then foreach of those objects enables the magnet.

if (Input.GetKeyDown(KeyCode.C))
 {
    GameObject[] PowerUps = GameObject.FindGameObjectsWithTag(“PowerUp”);
    //enable magnets on powerups
    foreach (GameObject PowerUp in PowerUps)
    {
       PowerUp.GetComponent<Powerup>().EnableMagnet();
    }
 }

Powerup Script

The public method so we can activate the magnet from our player script:

public void EnableMagnet()
 {
 _isMagnetActive = true;
 }

This part changes the rigidbody velocity when the magnet is active. In Update():

if (_isMagnetActive)
 {
    _direction = (_player.transform.position — this.transform.position).normalized * _magnetSpeed; 
    rb.velocity = _direction;
 }
 else 
 {
    //move down
    transform.Translate(Vector3.down * _speed * Time.deltaTime);
 }