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January 17, 20268 min readCreating Augmented Reality

Creating Augmented Reality UIs from Video Experiences

R
Replay Team
Developer Advocates

TL;DR: Leverage Replay's behavior-driven reconstruction to rapidly prototype and generate AR UI code from real-world video examples, bypassing traditional design and coding bottlenecks.

The future of AR UI development isn't about meticulously crafting every button and interaction from scratch. It's about capturing real-world interactions and translating them directly into functional code. Current screenshot-to-code solutions fail spectacularly at this, because they can only interpret static images, missing the crucial context of user behavior and intent. That's where Replay fundamentally changes the game.

The AR UI Bottleneck: From Concept to Code#

Developing AR UIs is notoriously complex. It requires:

  • Deep understanding of spatial design principles
  • Proficiency in AR frameworks like ARKit or ARCore
  • Iterative testing and refinement based on user feedback

This process is time-consuming, expensive, and often results in a disconnect between the initial vision and the final product. The traditional workflow, involving designers creating mockups, developers translating them into code, and testers validating the implementation, is ripe for disruption. The problem isn't just the complexity of AR development itself, but the friction in translating human behavior into machine-readable instructions.

Current image-based solutions are a dead end. They can generate basic UI elements from screenshots, but they lack the ability to understand the why behind user actions. They can't infer intent from a tap, a swipe, or a voice command.

Behavior-Driven Reconstruction: Video as the Source of Truth#

Replay offers a radically different approach: behavior-driven reconstruction. Instead of relying on static images, Replay analyzes video recordings of real-world AR experiences. This allows it to:

  • Understand user intent based on their actions
  • Identify key interaction patterns
  • Generate functional code that replicates the observed behavior

This is a paradigm shift. Instead of starting with a blank canvas, you start with a recording of a user successfully interacting with an AR interface. Replay then reconstructs the UI and its underlying logic, providing a solid foundation for further development.

typescript
// Example: Replay-generated code for handling a tap gesture in AR import * as ARKit from 'react-native-arkit'; const handleTap = async (event: ARKit.ARDidTapEvent) => { const { pointX, pointY } = event; // Logic to identify the tapped object in the AR scene const hitTestResults = await ARKit.performHitTest(pointX, pointY, ['existingPlaneUsingExtent']); if (hitTestResults.length > 0) { const tappedNode = hitTestResults[0].node; // Perform action based on the tapped node console.log('Tapped on node:', tappedNode.name); // Example: Update the node's material tappedNode.material = { diffuse: 'red' }; } };

This code, generated by Replay, demonstrates how it can translate a simple tap gesture into a functional interaction within an ARKit scene. Notice the use of

text
ARKit.performHitTest
to identify the object the user intended to interact with. This level of understanding is impossible to achieve with screenshot-to-code tools.

Replay in Action: Building an AR Furniture Placement App#

Let's imagine you're building an AR app that allows users to place virtual furniture in their real-world environment. Instead of starting from scratch, you can:

  1. Record a video: Capture a user successfully placing furniture in a room using an existing AR app or even a prototype. Focus on the interactions – the taps, swipes, and adjustments they make.
  2. Upload to Replay: Upload the video to the Replay platform.
  3. Reconstruct the UI: Replay analyzes the video and reconstructs the AR UI, including the furniture models, placement controls, and interaction logic.
  4. Customize and Extend: Use the generated code as a starting point to customize the UI, add new features, and integrate with your backend systems.

This dramatically accelerates the development process, allowing you to focus on refining the user experience rather than writing boilerplate code.

Replay vs. Traditional Methods and Screenshot-to-Code#

Here's a comparison of Replay against traditional AR UI development and screenshot-to-code tools:

FeatureTraditional AR DevScreenshot-to-CodeReplay
Video Input
Behavior Analysis
Code GenerationManualLimitedAutomated
Time to PrototypeWeeksDaysHours
Understanding User IntentRequires User TestingNoneInherent
Supabase IntegrationManualManualAutomated
Multi-Page GenerationManualManualAutomated

💡 Pro Tip: For best results, ensure your video recordings are clear and stable, with minimal background noise. Frame the area of interaction and avoid abrupt movements.

Key Features for AR UI Development#

Replay's features are particularly well-suited for AR UI development:

  • Multi-page generation: AR apps often involve complex workflows spanning multiple views. Replay can reconstruct entire user flows from a single video, generating code for each screen and the transitions between them.
  • Supabase integration: Seamlessly integrate your AR UI with a Supabase backend for data storage, authentication, and real-time updates. This is crucial for building dynamic and interactive AR experiences.
  • Style injection: Apply consistent styling across your AR UI by injecting CSS or styled-components. This ensures a polished and professional look and feel.
  • Product Flow maps: Visualize the user's journey through your AR app with automatically generated product flow maps. This helps you identify areas for improvement and optimize the user experience.
typescript
// Example: Replay-generated code for integrating with Supabase import { createClient } from '@supabase/supabase-js'; const supabaseUrl = 'YOUR_SUPABASE_URL'; const supabaseKey = 'YOUR_SUPABASE_ANON_KEY'; const supabase = createClient(supabaseUrl, supabaseKey); const saveARData = async (data: any) => { const { data: insertData, error } = await supabase .from('ar_data') .insert([data]); if (error) { console.error('Error saving AR data:', error); } else { console.log('AR data saved successfully:', insertData); } };

This code snippet demonstrates how Replay can generate code to seamlessly integrate with a Supabase backend, allowing you to store and retrieve AR data with ease.

Step 1: Record Your AR Experience#

Use your phone, tablet, or even a screen recording tool to capture a video of yourself or someone else interacting with an AR experience. Focus on the key interactions and user flows you want to replicate.

Step 2: Upload and Reconstruct#

Upload the video to Replay. The engine will analyze the video and reconstruct the UI and its underlying logic. This process typically takes just a few minutes.

Step 3: Customize and Deploy#

Review the generated code, make any necessary customizations, and deploy your AR app to your chosen platform.

⚠️ Warning: While Replay significantly accelerates the development process, it's important to remember that the generated code is a starting point. You'll still need to review and refine the code to ensure it meets your specific requirements.

📝 Note: Replay is constantly evolving, with new features and improvements being added regularly. Be sure to check the documentation for the latest updates.

The Future of AR UI Development#

Replay represents a fundamental shift in how AR UIs are developed. By leveraging video as the source of truth, it empowers developers to:

  • Rapidly prototype and iterate on AR experiences
  • Reduce development time and costs
  • Create more intuitive and user-friendly AR interfaces

The traditional approach of manually designing and coding AR UIs is becoming obsolete. The future belongs to behavior-driven reconstruction, where real-world interactions are translated directly into functional code.

MetricTraditional MethodReplayImprovement
Time to First Prototype2 Weeks2 Hours95% Reduction
Lines of Code Written500050090% Reduction
Development Cost$10,000$1,00090% Reduction

This table shows the potential impact Replay can have on AR UI development, significantly reducing time, code, and cost.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited functionality, as well as paid plans for more advanced features and higher usage limits. Check the pricing page for the latest details.

How is Replay different from v0.dev?#

While both tools aim to generate code, Replay stands apart by analyzing video input to understand user behavior, leading to more accurate and context-aware code generation. v0.dev relies on text prompts and can't capture the nuances of real-world interactions.

What AR frameworks does Replay support?#

Replay currently supports React Native ARKit, ARCore, and Three.js. Support for other frameworks is planned for future releases.

Can I use Replay to generate code for existing AR apps?#

Yes! Simply record a video of yourself interacting with the app and upload it to Replay. The engine will reconstruct the UI and generate code that you can use as a starting point for further development.


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