threejs-core-scene-graph

What problem does it solve?

Managing complex Three.js scenes requires clear structure of Object3D hierarchies, correct parent-child relationships, and reliable traversal. It also covers pitfalls like reparenting with add() vs attach(), disposal management, and matrix update patterns that can lead to subtle rendering bugs if ignored.

Core Features & Use Cases

• Comprehensive reference for Object3D, Scene, Group, Mesh, and Layers, including traversal, coordinate conversion, and hierarchy management.
• Demonstrates safe reparenting with attach(), proper disposal patterns, and layer-based visibility to optimize rendering.
• Provides practical examples of hierarchical scene construction, reparenting scenarios, debugging helpers, and anti-patterns.

Quick Start

Create a simple scene with a parent Group and a child Mesh, then reparent the child to another Group using attach() to preserve its world position.