OnMouseDown not firing?

Hi radlemur,

I had the very same issue with you. I still do not understand the deeper issue. What I tried at first was create a new object, apply the script (with no changes) and see if it works. It didn't work. What I tried next was restarting Unity and it still didn't work. Finally, what I did was delete all objects that referenced that script (including prefabs). Then I created the same objects anew, applied the very same script (no changes whatsoever) and it started working. Since in all cases I was basically working with the default Spheres and Cubes, I think this might be a bug.

No need for raycasting for simple behaviour like that in my opinion, these default events should work (and now they do!).

I hope this helps.

Cheers, Alex

Hi everyone, I had this very particular issue once, the real issue here is the Z depth of your box collider, for me Z = (0 to 1) will fire the OnMouseDown but higher values will not do, this is ideal for 2d games requires no depth as in my case but for 3D youll have to figure what is really going on.,

Hello,

Try this :)

 using UnityEngine;
 using System.Collections;
 
 public class NewBehaviourScript : MonoBehaviour {
 void Start () {
     Debug.Log("started");      
 }
     void Update() {
         if (Input.GetMouseButton(0))
             Debug.Log("down");
     }
 }

0 = LMB

1 = RMB

2 = MMB

Usually when I see this problem it is due to a collider conflict. That is, OnMouseDown() is raycasting under the hood. If the ray from the mouse position strikes another collider (visible or not), you don't get the OnMouseDown() call. To debug put the following code on an empty game object. Take a look at what is returned when you click on something that should generate an OnMouseDown() but does not:

 using UnityEngine;
 using System.Collections;
  
 public class RaycastExample : MonoBehaviour {
 
     void Update () {
         if (Input.GetMouseButtonDown (0)) {
              Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             RaycastHit hit;
              if (Physics.Raycast(ray, out hit)) {
                 Debug.Log ("Name = " + hit.collider.name);
                 Debug.Log ("Tag = " + hit.collider.tag);
                 Debug.Log ("Hit Point = " + hit.point);
                 Debug.Log ("Object position = " + hit.collider.gameObject.transform.position);
                 Debug.Log ("--------------");
              }
         }
     }
 }