OnMouseDown on Invisible Sprite?

Hello all,

I have a sprite that I've made invisible by turning the spriterenderer off.
When I click on the sprite I want it to become visible.
OnMouseDown() does not seem to be triggered on my "invisible" sprite, which seems perfectly reasonable to me.

If I want to be able to use OnMouseDown() on an invisible sprite, how can I do that?
(I.e. how can I make a sprite invisible, but clickable AND made visible when clicked)?

Thanks.

-- Paul

 

You should still be able to catch mouse down events from an invisible sprite if you have a collider on it. Will do some tests and report back.

 

Sure enough, it works. The good old trust OnMouseDown to the rescue!

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class ClickVisibility : MonoBehaviour {
6.  
7.     private bool visible = true;
8.  
9.     // Use this for initialization
10.     void Start () {
11.    
12.     }
13.    
14.     // Update is called once per frame
15.     void Update () {
16.         renderer.enabled = visible;
17.     }
18.  
19.     void OnMouseDown() {
20.         visible = !visible;
21.         Debug.Log ("toggle " + visible);
22.     }
23. }
24.  
25.  

 

OnMouse events depend on a collider, nothing else. (Except for GUIText and GUITexture objects.)

--Eric

 

I created a script with an OnMouseDown event and an Update() event that is attached to a sprite with a 2D circle collider on it. The Update is firing but the OnMouseDown is not.

I have a quad with a texture and a mesh collider that is positioned BEHIND my sprite and, if I remove the quad from the scene or disable its mesh collider, I get the mouse events in the sprite.

What do I need to do to prevent my background quad from "swallowing" the mouse events?
I could set it to "ignoreraycast" but I can't do that.

-- Paul

 

I'd suggest getting rid of the mesh collider and use a polygon collider instead.

--Eric

 

Eric,

Thanks, but it still won't work for my situation.

In my situation I have two sprites, one is a child of the other.
The child sprite has the script with the OnMouseDown() event that never fires.

If I make the child a standalone sprite with the script it works, but that's not what I want.
If I put the script with the OnMouseDown() event on the parent sprite it works from the parent script, but that's not where I want it.

NOTE:
The parent has a rigidbody2D and a polygon collider.
The child sprite has a circle collider.

Any ideas?

-- Paul

 

The objects should be separate; objects that have a rigidbody and children are compound colliders that act as a single object.

--Eric

 

Eric,

Got it. That clarifies the situation.
It works as you say.

For my own edification, this only applies to the exact situation you stated; a parent with a rigidbody and child object with colliders?
I.e. a parent sprite with a collider and a child sprite with a collider (no rigidbody anywhere) would not exhibit this compound collider behaviour?

-- Paul

 

Yep.

--Eric

 

Great. Got it.

Thanks Eric!