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Question by Hrjcox · Oct 18, 2020 at 07:05 AM · collisionui3ddetection

How to detect when an object goes past (so it looks like it touches) a UI element.

I have a UI element in the top right of my screen. When the player collects coins they shoot up in to the top right of the screen and past the UI element. I want to be able to detect when it goes past the element.

I considered adding a box collider top the UI element and using collision/trigger, the issue os that the canvas in engine is actually off screen the rendered over the camera so the box collider isnt actually where it looks like it is.

I also tried using if(object is at position), but because the positions go in to the .0000000's, it was very rarely hitting it.

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avatar image I5 · Oct 18, 2020 at 07:44 AM 0
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Are you wanting actual collisions with UI objects and game objects, so that physics/layers evoke collisions? Or, do you just need to know if an object passes through the coordinate area of a UI object?

avatar image Hrjcox I5 · Oct 18, 2020 at 08:17 AM 0
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I just need to know if its passed through so I can then delete the game object and play an animation that makes it look like the coin has gone in to the UI element.

avatar image Zymurer · Oct 18, 2020 at 12:15 PM 0
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Did you drag your cameras field of view to the canvas?

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Answer by B3Designs · Oct 18, 2020 at 04:06 PM

Personally I'd convert the coin's position from World to Screen coordinates, then just check for proximity to your UI element, assuming the UI never moves of course...

A lot quicker and easier than try to do it through collisions.

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