leejunkim

Input System (new)

2 min read

  1. Download thru package manager
    • Also go here and set to whatever settings you want

One way to do it

  1. Add Player Input as component
  2. Add Input Actions in Assets
  3. Add controle scheme
    • The requirement is that you have a keyboard
  4. Add an Action Map
    • You create one for each thing, like if you’re walking, driving a car, etc
  5. Like this
    • You can “Listen” to input the Path by pressing the desired key
  6. Movement
    • Action Type - Passthrough: We can map easily a vector2 to movement
  7. Check in components

Example script 1 (new)

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;
 
public class PlayerMovement : MonoBehaviour
{
    public Rigidbody2D rb;
    public float moveSpeed;
    private Vector2 _moveDirection;
 
    // reference to the action we want to use
    public InputActionReference move;
    public InputActionReference fire;
 
    [SerializeField] ParticleSystem fireParticles;
 
    void Start()
    {
        fireParticles.Stop();
    }
 
    void Update()
    {
        _moveDirection = move.action.ReadValue<Vector2>();
    }
    void FixedUpdate()
    {
        rb.velocity = new Vector2(_moveDirection.x * moveSpeed, _moveDirection.y * moveSpeed);
    }
 
	//called automatically if object is enabled
    void OnEnable()
    {
        // registering the event listener for the fire action
        // += means  you are "subscribing" to an event => "When the started event of fire.action occurs,
        // execute the Fire method
        fire.action.started += Fire;
    }
 
    void OnDisable()
    {
        fire.action.started -= Fire;
    }
 
    private void Fire(InputAction.CallbackContext obj)
    {
        Debug.Log("Fire!");
        fireParticles.Play();
    }
}

Another way to do it

  • Add [SerializeField] InputAction movement; to the script, then the gameobject will have this
  • If you press the + button:
  • We bind them with buttons (paths > listen)
  • If I want to do something fire, for example, then just [SerializeField] InputAction fire; and repeat

Example script

public class PlayerController : MonoBehaviour
{
    [SerializeField] InputAction movement;
 
    private void OnEnable()
    {
        movement.Enable();
    }
    
    private void OnDisable()
    {
        movement.Disable();
    }
 
    // Update is called once per frame
    void Update()
    {
        // ==== OLD INPUT MANAGER ====
        // float horizontal = Input.GetAxis("Horizontal");
        // Debug.Log(horizontal);
        // float vertical = Input.GetAxis("Vertical");
        // Debug.Log(vertical);
 
        float horizontal = movement.ReadValue<Vector2>().x;
        float vertical = movement.ReadValue<Vector2>().y;
 
    }
}

Graph View

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