AR/VR Development-Build, Optimize & Publish Your AR/VR App

Learn how to build a VR basketball game & an AR furniture placement app, optimize for 90 FPS, and publish to stores. Perfect for beginners!

🌟 Quick Recap of Part 1

In Part 1, you:

• 🛠️ Installed Unity and set up AR Foundation or Oculus SDK.

• 🐱 Built a virtual pet AR app that follows your camera.

• 🔍 Learned the basics: AR overlays digital objects in the real world, while VR immerses you in a fully digital space.

Ready to level up? Let’s make your apps interactive and polished!

🎨 How to Design Immersive AR & VR Interactions

1. Build Hand-Tracking Mechanics in VR

• Why? Let users grab and throw objects naturally—no controllers needed.

• How?

  1. Install XR Interaction Toolkit.

  2. Add the XR Grab Interactable component to your object (e.g., basketball).

• 👉 Tutorial: Build a VR Grab & Throw Mechanic

• Try this: simple code

// Simple script to let users grab a VR ball 
public class GrabBall : MonoBehaviour { 
void Start() { 
XRGrabInteractable grab = GetComponent<XRGrabInteractable>(); 
grab.onSelectEntered.AddListener(OnGrab); 
} 
void OnGrab(XRBaseInteractor interactor) { 
Debug.Log("Ball grabbed!"); 
} 
} 

// Highlight a button when stared at 
void Update() { 
RaycastHit hit; 
if (Physics.Raycast(Camera.main.transform.position, Camera.main.transform.forward, out hit)) { 
if (hit.collider.CompareTag("Button")) { 
hit.collider.GetComponent<Image>().color = Color.yellow; 
} 
} 
} 

• Pro Tip: Tag interactive elements as Selectable.

• Engagement Challenge: Try changing the highlight color every time you look away and back! 🎨

// Disable gyroscope for ARCore (Android) 
ARCoreSessionConfig config = new ARCoreSessionConfig(); 
config.EnableGyroscope = false; 

public class PlaceFurniture : MonoBehaviour {
public ARRaycastManager arRaycastManager;
public GameObject sofaPrefab;
void Update() {
if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began) {
var hits = new List<ARRaycastHit>();
if (arRaycastManager.Raycast(
Input.GetTouch(0).position, hits, TrackableType.Planes)) {
Instantiate(sofaPrefab, hits[0].pose.position, Quaternion.identity);
}
}
}
}

Step 2: Test on Your Phone

1. Build the app → Install on Android/iOS.

2. Scan your floor → Tap to place a sofa! 🛋️
   👉 Challenge: Can you add a lamp and table too?

📲 Test & Publish Your First AR/VR App

1. Test on Real Devices

• VR: Meta Quest, HTC Vive, or Oculus Rift.

• AR: iPhone (ARKit) & Android (ARCore).

2. Publish to Stores

👉 Publish Your VR Game Today: sidequestvr.com

3. Gather Feedback

• Share on Reddit r/ARVRdev or Discord XR Beginners Hub.

• Prompt: “Here’s my AR furniture app—what should I add next?”