koobas.hobune.stream
I need help writing a simple script for making an object face the mouse in 2D.
I've spent the last 3 days trying to get a simple sprite to face the mouse wherever I put it on the screen, and so far I've crashed my computer twice and have gone to bed angry three times, so I finally thought I needed to ask the forums about this. I'm using C#, in monodevelop, and have so far scripted the object to move around, and have put in placeholder entries for some future items, but I need the object to face it's front side toward my mouse's location on the screen every frame. I'm rotating around the z axis, y is vertical, x is horizontal. I'm sure this is extremely simple to complete, but I've scoured the internet to no avail, so any help is welcome.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class LRmovement : MonoBehaviour {
public int HP;
public GameObject Controller;
public GameObject Cannon;
public float Speed;
public Vector3 mousePosition;
public float targetDistance;
void Start ()
{
}
void Update ()
{
if (Input.GetKey (KeyCode.W))
transform.position += Vector3.up * Speed * Time.deltaTime;
if (Input.GetKey (KeyCode.A))
transform.position += Vector3.left * Speed * Time.deltaTime;
if (Input.GetKey (KeyCode.S))
transform.position += Vector3.down * Speed * Time.deltaTime;
if (Input.GetKey (KeyCode.D))
transform.position += Vector3.right * Speed * Time.deltaTime;
mousePosition = Input.mousePosition;
}
void LateUpdate ()
{
mousePosition = Camera.main.ScreenToWorldPoint (mousePosition);
mousePosition.z = targetDistance;
}
}
this should work - place it inside your update:
mousePosition = Input.mousePosition;
mousePosition = Camera.main.ScreenToWorldPoint(mousePosition);
Quaternion rot = Quaternion.LookRotation(transform.position - mousePosition, Vector3.forward );
transform.rotation = rot;
transform.eulerAngles = new Vector3(0, 0,transform.eulerAngles.z);
I didn't write this myself, I found it here, the second post down:
https://forum.unity3d.com/threads/2d-sprite-look-at-mouse.211601/
This is just giving me the same problem I've been having, it puts the mouse position as the pixel coordinates on the screen, not the game world coordinates. @VeeooshL
This question was asked more than a year ago still I will upload this answer for anyone facing similar problem . I was able to put together this script for a top down 3d game it should work the same for 2d games in the x-z plane
public Vector3 mousePos,lookPos; void Update () { mousePos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, 10); lookPos = Camera.main.ScreenToWorldPoint(mousePos); lookPos = transform.position-lookPos; float angle = Mathf.Atan2(lookPos.z, lookPos.x) * Mathf.Rad2Deg; transform.rotation = Quaternion.AngleAxis(angle, Vector3.down); }
