Threejs Webgl

Three.js WebGL/WebGPU Development

Overview

Three.js is the industry-standard JavaScript library for creating 3D graphics in web browsers using WebGL and WebGPU. This skill provides comprehensive guidance for building performant, interactive 3D experiences including scenes, cameras, renderers, geometries, materials, lights, textures, and animations.

Core Concepts

Scene Graph Architecture

Three.js uses a hierarchical scene graph where all 3D objects are organized in a tree structure:

Scene
├── Camera
├── Lights
│   ├── AmbientLight
│   ├── DirectionalLight
│   └── PointLight
├── Meshes
│   ├── Mesh (Geometry + Material)
│   └── InstancedMesh
└── Groups

Essential Components

Every Three.js application requires these core elements:

1. Scene: Container for all 3D objects
2. Camera: Defines the viewing perspective
3. Renderer: Draws the scene to canvas (WebGL or WebGPU)
4. Geometry: Defines the shape of objects
5. Material: Defines the surface appearance
6. Mesh: Combines geometry and material

Quick Start Pattern

Basic Scene Setup