Skill-Details

aframe-webxr

Relevant only for VR/AR and immersive web experiences.

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---
name: aframe-webxr
description: Declarative web framework for building browser-based 3D, VR, and AR experiences using HTML and entity-component architecture. Use this skill when creating WebXR applications, VR experiences, AR experiences, 360-degree media viewers, or immersive web content with minimal JavaScript. Triggers on tasks involving A-Frame, WebXR, VR development, AR development, entity-component-system, declarative 3D, or HTML-based 3D scenes. Built on Three.js with accessible HTML-first approach.
---

# A-Frame WebXR Skill

## When to Use This Skill
- Build VR/AR experiences with minimal JavaScript
- Create cross-platform WebXR applications (desktop, mobile, headset)
- Prototype 3D scenes quickly with HTML primitives
- Implement VR controller interactions
- Add 3D content to web pages declaratively
- Build 360° image/video experiences
- Develop AR experiences with hit testing

## Core Concepts

### 1. Entity-Component-System (ECS)

A-Frame uses an entity-component-system architecture where:
- **Entities** are containers (like `<div>` in HTML)
- **Components** add functionality/appearance to entities
- **Systems** provide global functionality

```html
<!-- Entity with components -->
<a-entity
  geometry="primitive: box; width: 2"
  material="color: red; metalness: 0.5"
  position="0 1.5 -3"
  rotation="0 45 0">
</a-entity>
```

**Primitives** are shortcuts for common entity + component combinations:

```html
<!-- Primitive (shorthand) -->
<a-box color="red" position="0 1.5 -3" rotation="0 45 0" width="2"></a-box>

<!-- Equivalent entity-component form -->
<a-entity
  geometry="primitive: box; width: 2"
  material="color: red"
  position="0 1.5 -3"
  rotation="0 45 0">
</a-entity>
```

### 2. Scene Setup

Every A-Frame app starts with `<a-scene>`:

```html
<!DOCTYPE html>
<html>
  <head>
    <script src="https://aframe.io/releases/1.7.1/aframe.min.js"></script>
  </head>
  <body>
    <a-scene>
      <!-- Entities go here -->
      <a-box position="-1 0.5 -3" color="#4CC3D9"></a-box>
      <a-sphere position="0 1.25 -5" radius="1.25" color="#EF2D5E"></a-sphere>
      <a-cylinder position="1 0.75 -3" radius="0.5" height="1.5" color="#FFC65D"></a-cylinder>
      <a-plane position="0 0 -4" rotation="-90 0 0" width="4" height="4" color="#7BC8A4"></a-plane>
      <a-sky color="#ECECEC"></a-sky>
    </a-scene>
  </body>
</html>
```

The scene automatically injects:
- Default camera (position: `0 1.6 0`)
- Look controls (mouse drag)
- WASD controls (keyboard movement)

### 3. Camera Systems

**Default Camera** (auto-injected if none specified):

```html
<a-entity camera="active: true" look-controls wasd-controls position="0 1.6 0"></a-entity>
```

**Custom Camera**:

```html
<a-camera position="0 2 5" look-controls wasd-controls="acceleration: 50"></a-camera>
```

**Camera Rig** (for independent movement and rotation):

```html
<a-entity id="rig" position="0 0 0">
  <!-- Camera for head tracking -->
  <a-camera look-controls></a-camera>

  <!-- Movement applied to rig, not camera -->
</a-entity>
```

**VR Camera Rig with Controllers**:

```html
<a-entity id="rig" position="0 0 0">
  <!-- Camera at eye level -->
  <a-camera position="0 1.6 0"></a-camera>

  <!-- Left hand controller -->
  <a-entity
    hand-controls="hand: left"
    laser-controls="hand: left">
  </a-entity>

  <!-- Right hand controller -->
  <a-entity
    hand-controls="hand: right"
    laser-controls="hand: right">
  </a-entity>
</a-entity>
```

### 4. Lighting

**Ambient Light** (global illumination):

```html
<a-entity light="type: ambient; color: #BBB; intensity: 0.5"></a-entity>
```

**Directional Light** (like sunlight):

```html
<a-entity light="type: directional; color: #FFF; intensity: 0.8" position="1 2 1"></a-entity>
```

**Point Light** (radiates in all directions):

```html
<a-entity light="type: point; color: #F00; intensity: 2; distance: 50" position="0 3 0"></a-entity>
```

**Spot Light** (cone-shaped beam):

```html
<a-entity light="type:

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