Three.js scene setup, cameras, renderer, Object3D hierarchy, coordinate systems. Use when setting up 3D scenes, creating cameras, configuring renderers, managing object hierarchies, or working with transforms.

Three.js 场景设置、摄像机、渲染器、Object3D 层级结构、坐标系。用于设置 3D 场景、创建摄像机、配置渲染器、管理对象层级或处理变换操作。