collider2D.bounds.Contains not working properly

Questions & Answers
1

I’ve got a GameController object with a square 2D collider that covers the whole screen. Inside that GameController there are 7 objects (Zones), each one with their own polygon collider. Here’s the setup:

43123-1.png
43123-1.png594×615 52 KB

43122-2.png

What I’m trying to do is to check if the clicked position is inside any of those Zone’s colliders whenever I click inside the big square collider.

This is the OnMouseDown() code of the GameController’s script:

void OnMouseDown ()
{
    Vector3 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);

    if(this.collider2D.bounds.Contains(mousePos)) Debug.Log ("1st Check");

    //'Zones' is a list with all the Zones GameObjects
    foreach (GameObject zone in Zones)
    {
        if(zone.collider2D.bounds.Contains(mousePos))
        {
            Debug.Log ("2nd Check");
        }
    }
}

Shouldn’t I ALWAYS get the “1st Check”? Because it’s redundant: if the OnMouseDown() got triggered because I clicked inside the collider, then the mouse position has to be inside the collider. But I never do, so I think I’m missing something right here about the Input.mousePosition or the ScreenToWorldPoint()

3

Haven’t tested, but it might be because you’re trying to see if a 2D collider contains a 3D point. Cast your mousePos ((Vector2) mousePos) when you call the contains and see if that works.

Also, collider.bounds doesn’t work so well with non-rectangular colliders. So for your zones, you may want to use collider.OverlapPoint instead. (And also you may want to fix up those colliders to match the visual representation.)

2

if you just want to chek you are clicking on zona than you dont need to use collider.bounds

just write in script

//this will give you event when you click on zona 1 if its drag on zona1

void OnMouseDown()

{
debug.log(“clicked on zona1”); //put this script on zona1 gameobject and same for all 7
}

4

This should be a unity bug. If I use Collider2D and check whether another object is inside it, I should not consider z-position, should I?