Unity AR How can i trigger a button in the scene?

Question

I have this little AR-Unityapp for Android and i try to play a video with a button. But the button should not be on the screen ( canvas ) it should be in the scene ( understandable? ). So i made a 3d plane which simply starts the video with a pointer down event but it won´t work. I know that its possible to make this but i have no idea how some help would be helpful ( xP ).

Answer 1

use a world canvas:

Create a canvas and set its "render mode" to "world". In that canvas you can put your button, give it a 3D location as you would with your plane, but you can use normal UI functionalities, such as buttons, instead of implementing click detections your self.

Answer 2

If you want to trigger a Pointer Down event just follow the steps below

1. Add Physics Raycaster to your Camera as shown below
2. Add EventSystem object in your scene
   Right click in Hirarchy Window -> UI -> Event System
   
3. Attack Event Trigger component to the required plane
   Select Plane -> Add Component -> Event Trigger -> Add Event of Pointer Down
4. Now Call the Required method via PointerDown Event (In My case Plane.OnSelected())

1. Steps 1 to 2 as above

2. Attach the below Script to that Plane as below

    using UnityEngine; using UnityEngine.EventSystems; public class Plane : MonoBehaviour,IPointerDownHandler { public void OnPointerDown(PointerEventData eventData) { Debug.Log("CALLED"); } } 

   This Method will be called on Pointer Down on the required plane. As Seen in the above code we are using IPointerDownHandler interface of UnityEngine.EventSystems

I am sure this will clear your problem.