Is object and camera distance trigger possible in USDZ?

In USDZ, is it possible to measure the distance between a certain object and the camera and activate another object if it is below a certain distance?

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2 replies left - gpt-4o
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using Unity 2022.3.14

In Needle Engine with Unity, you can measure the distance between an object and a camera and trigger an action (e.g., activate another object) if the distance is below a certain threshold.

Here are the steps in pseudocode:

  1. Get the objects and the camera: Locate the game objects and the camera in the scene.
  2. Calculate the distance: Use Vector3.Distance to compute the distance between the object and the camera.
  3. Trigger condition: Check if the distance is below a certain threshold.
  4. Activate another object: Enable or activate the desired game object based on this check.

Here’s the example in C# using Unity:

using UnityEngine;

public class DistanceTrigger : MonoBehaviour
{
    public GameObject targetObject; // Object to measure distance from
    public GameObject cameraObject; // Camera object
    public GameObject objectToActivate; // Object to activate
    public float activationDistance = 5.0f; // Distance threshold

    void Update()
    {
        float distance = Vector3.Distance(targetObject.transform.position, cameraObject.transform.position);

        if (distance < activationDistance)
        {
            objectToActivate.SetActive(true);
        }
        else
        {
            objectToActivate.SetActive(false);
        }
    }
}

Attach this script to an empty GameObject in your scene, and set the references for targetObject, cameraObject, and objectToActivate in the Inspector.

Feel free to ask further questions if needed, Emmanuel.

1 replies left - gpt-4o
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Does that code work on USDZ?

No, the code provided works within the Unity environment, specifically for applications using Needle Engine and Unity. USDZ is a different format primarily used for AR content on Apple devices, and it doesn’t support script execution natively in the same way Unity does.

To handle interactive behaviors in AR content using USDZ, you would usually require a more complex setup. Often, you might need a corresponding AR application capable of handling such interactions, such as using ARKit with Swift for iOS.

For more information, you might want to explore ARKit documentation or consider using Unity’s AR Foundation to create AR experiences that can be exported to formats that support interactive scripting more robustly.

Would you like assistance on a specific Unity or Needle Engine use case? If so, please let me know how I can assist further.

0 replies left - gpt-4o
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When producing in unity, is it possible to trigger the distance between the camera and the object that can operate in usdz?

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