OnMouse events (e.g. OnMouseEnter) not working with new Input System

Question

Hi,

I just figured out that OnMouse events (OnMouseEnter, etc.) are not working after adding the new input system. I wondered if this is a bug or a feature. If this is in case intended, could someone explain to me, why this is happening?

I tested it in several projects with this simple setup. Empty scene with only a Cube (box collider attached of course :)) and this simple script:

 using UnityEngine;

 public class Test : MonoBehaviour
 {
     private void OnMouseEnter()
     {
         Debug.Log("Test");
     }
 }

The result was always the same. It works perfectly before adding the new Input System but not after.

Answer 1

I was strugling with the same problem, but this excellent StackOverflow answer showed me the correct way of doing this. (Solution 6)

First, you need to add a PhysicsRaycaster to your camera. Once you have done that, you can implement the IPointerEnterHandler and IPointerExitHandler (and all the other ones) on any gameobject you like.

You can add a PhysicsRaycaster by adding the following script to your camera:

 public class MeshDetector : MonoBehaviour
 {
     void Start()
     {
         addPhysicsRaycaster();
     }
 
     void addPhysicsRaycaster()
     {
         PhysicsRaycaster physicsRaycaster = GameObject.FindObjectOfType<PhysicsRaycaster>();
         if (physicsRaycaster == null)
         {
             Camera.main.gameObject.AddComponent<PhysicsRaycaster>();
         }
     }
 }

Afterwards, you can use IPointerEnterHandler etc as such:

 public class MyGameObject : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
 {
     public void OnPointerEnter(PointerEventData eventData)
     {
         Debug.Log("Hello - Mouse Enter");
     }
 
     public void OnPointerExit(PointerEventData eventData)
     {
         Debug.Log("Hello - Mouse Exit");
     }
 }

Answer 2

Answer by KanyeWestknight · Oct 30, 2021 at 08:54 AM

@v1ness

Don't know if you figured it out but I was searching for this exact topic and there never really was an answer to what to do that I could find. Tried refining searches a bunch but your question was one of the ones at the top of the search for "mouseover unity new input" and a bunch of variations of that including the IPointerEnterHandler search as well.

Here is what I was able to do to get the Vector2 dimensions with ease:

alt text

and my current code to grab the Vector2 of the position (Which I am testing but putting it in FixedUpdate() seems to work well so far:

Vector2 mousePosition = mouseInput.Mouse.MousePosition.ReadValue<Vector2>();

I hope this helps either you or someone else that comes by with the same issues I was having when starting out with the new Input system.

untitled2.png (55.3 kB)

untitled.png (49.2 kB)

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OnMouse events (e.g. OnMouseEnter) not working with new Input System

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