UTD CAMPUS LENS
AR-based indoor navigation app using Unity. It uses Unity's Universal Render Pipeline (URP), AR Foundation, and NavMesh. The setup involves Android support, implementing depth API features, and creating navigation paths.
Step-by-Step Guide
- Unity Project Setup Start a New Project: Use the URP template.
Install Required Packages:
Go to
File > Build Settings and switch the platform to Android.
Open Edit > Project Settings > Player Settings and set:
Remove default icons.
Remove default icons. Adjust description and input handling. Install the XR Plugin Management and enable ARCore for Android. Install
AI Navigation
via the Package Manager (optional to update).
Adjust Rendering Settings:
Replace the default graphics asset with
Mobile URP Asset.
Adjust Quality Settings to Mobile. Setup AR Settings:
Add the AR Occlusion Manager component to the main camera. Set Depth Mode to
Best
and enable Environmental Occlusion.
- Scene Preparation Basic Setup:
Delete "Main Camera" and "Global Volume". Right-click in the hierarchy and create an XR Origin under XR. Add AR Session and Image Tracking:
Add an AR Session object. Add an AR Tracked Image Manager to the XR Origin. Create a XR Reference Image Library in a
new Assets > Image Tracking folder.
Add your reference image (e.g., Unity logo) with specified dimensions (e.g., 0.1m). Prefabs and Materials:
Create folders for Scripts, Materials, and Prefabs. Design a basic navigation environment: Floor (Plane with material). Walls and a target (Cube objects for obstacles and goals). Assign materials: Use Transparent Material for walls. Create a Line Material for navigation paths. Bake Navigation Mesh:
Add a NavMeshSurface to the floor. Configure a small agent radius for tight navigation.
- Code Implementation Create Scripts:
Create and attach scripts:
NavigationTarget.cs: For marking navigation targets.
IndoorNav.cs: For managing AR tracking and navigation logic.
IndoorNav.cs Breakdown: Components: Reference AR Tracked Image Manager. Manage navigation targets and NavMesh surfaces. On Trackable Changes: Instantiate prefabs on detecting a tracked image. Update positions and rotations dynamically. Path Updates: Calculate paths using NavMeshPath. Use a LineRenderer to visually render paths. Integration:
Attach IndoorNav.cs to a central IndoorNavigation object. Assign required references: Player (Main Camera), Tracked Image Manager, Line Renderer, and Prefab.
- Testing Simulate AR:
Install XR Simulation to test in the Unity Editor. Press Play and verify: Image tracking spawns the prefab. Navigation paths update as you move the camera. Deploy to Android:
Go to
File > Build Settings > Android.
Attach your device and click Build and Run. Test AR functionality on the smartphone.