HoloScript Best Practices Guide

Mastering HoloScript requires more than just knowing simple syntax. To create compelling and comfortable VR experiences, follow these 10 core principles.

1. Master the Basics

Start small. Before building complex interactive worlds, ensure you understand the fundamental building blocks:

• Geometry: Use primitives like sphere, cube, and plane effectively.
• Transformations: Understand how position, rotation, and scale work in 3D space.
• Colors: Use hex codes (e.g., #ff0000) to define visual style.

2. Use Traits for Interaction

Static worlds are boring. Use HoloScript+ traits to bring objects to life:

• @grabbable: Allow users to pick up objects.
• @pointable: Enable laser-pointer interactions.
• @hoverable: Add visual feedback when users gaze at or point to objects.

3. Leverage Animations

Movement adds polish and guides user attention.

• Use animate(node, { ... }) for smooth transitions.
• Simple effects like floating (bobbing up and down) or fading can make a scene feel "alive".

4. Optimize for Performance

VR demands high frame rates (90fps+).

• Low Poly: Stick to simple shapes where possible.
• Network Efficient: Use @networked only for objects that must be synced between users. Unnecessary syncing kills bandwidth.

5. Consider Ergonomics (Critical)

VR is a physical medium. Respect the user's body:

• The Sweet Spot: Place interactive elements between 0.5m and 1.5m from the user (z: -0.5 to z: -1.5).
• Comfort Zone: Avoid placing UI too high (neck strain) or too low. Keep it near eye level (approx y: 1.5 to y: 1.7).

6. Implement Physics

Physics adds weight and presence.

• Dynamic: Use physics: "dynamic" for objects that should fall, bounce, or be thrown.
• Static: Use physics: "static" for walls, floors, and heavy furniture.
• Gravity: Remember to enable gravity for realistic throwing (@throwable).

7. Design for Interaction

Don't hide important elements.

• Visibility: Ensure key interactables are sized appropriately (not too small to grab).
• Affordance: An object that looks grabbable (like a handle) should be grabbable.

8. Experiment with Materials

Visual fidelity matters.

• PBR: Use Physically Based Rendering properties.
• Roughness/Metallic: Adjust these to differentiate between materials like plastic (roughness: 0.5, metallic: 0) and gold (roughness: 0.1, metallic: 1).

9. Use Events Wisely

Feedback loops are essential.

• Responsiveness: Always handle events like on_grab, on_hover_enter, and on_click.
• Audio/Haptics: Trigger sound or haptic pulses in your event handlers to confirm user actions.

10. Iterate and Test

VR development is iterative.

• Test Frequently: Code -> Deploy -> Put on Headset -> Repeat.
• User Testing: What feels intuitive to you might confuse a new user. Watch others play your scene.