重叠3D对象的OnPointerDown

Question

I have two identical 3D objects in my scene. Both of them have a boolean property: isSelected . For one of the objects, isSelected is true. For the other - isSelected is false.

Both objects have a script attached, which implements the IPointerDownHandler interface.

At some point in the game, both 3D objects have the same coordinates (absolutely the same coordinates, the objects overlap each other). If I click an object with my mouse, is there a way for me to predict for which object the OnPointerDown event will been triggered? I only want the OnPointerDown event to trigger for the object with isSelected == true.

Is there any way to achieve this? Should I use raycasts? Any help is appreciated, thanks.

Answer 1

Your question seems so easy I might misunderstand you!

if (!isSelected) return;
.. your handling code ..

Another idea is, in Unity you should really use components a lot, they are a natural part of things. Don't forget each of your c# scripts is indeed a "component".

Google "Unity3d disable a component" for a basic tutorial

yourComponent.enabled = false;

You say

I only want the OnPointerDown event to trigger for the object with isSelected == true.

Thus, perhaps just turn off that whole component with the boolean.

Another cool idea is this: turn off the collider with the boolean.

Collider c = GetComponent<Collider>();
c.enabled = false;

Then you truly won't get the event, you see?

Regarding your separate question

there a way for me to predict for which object the OnPointerDown event will been triggered

Since you're talking 3D objects,

1) If one is closer to the camera , that's the one

2) If they are in truly identical 3D positions, which should never happen: No, there's absolutely no way to tell, it's "random".