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Create a button

Add interactivity to your environment by using the interaction system to make a simple button.

Set up an interactable object

1. Add a collider

Take that object you want to be interactable on trigger when the user points towards it. It should be an object with a UMI3DModel component on it. Enable the property "has a collider".

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2. Make the object interactable

Add an UMI3DInteractable component to the object.

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Add the trigger interaction

1. Create the event

Add a UMI3DEvent component to the object.

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And reference it in the interactions list of the UMI3DInteractable component.

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2. Define custom behaviour

Add a new script to the object and write down the code to execute when a user triggers the button. Here is an example.

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using umi3d.edk;

using UnityEngine;

using static umi3d.edk.interaction.AbstractInteraction;

public class ButtonAction : MonoBehaviour
{
    private UMI3DModel buttonModel;

    private void Start()
    {
        buttonModel = GetComponent<UMI3DModel>();
    }

    public void Press(InteractionEventContent content)
    {
        buttonModel.transform.Translate(-0.01f * Vector3.up);

        Transaction t = new();
        t.AddIfNotNull(buttonModel.objectPosition.SetValue(content.user, buttonModel.transform.localPosition)); // content.user is the user that triggered the button
        t.Dispatch();
    }
}

The Press method will be the method executed when an interaction with the button occurs. Context information is available in the event content parameter.

Configure the method to be triggered when a user click on the button in the Unity Inspector.

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