threejs-fundamentals

To set up a Three.js scene, you initialize the Scene, configure a PerspectiveCamera or OrthographicCamera, and create a WebGLRenderer to display your 3D objects. You also establish an animation loop to continuously render frames and update object transforms.

Organizing Object3D and Mesh hierarchies in WebGL projects is best done using Three.js Groups to manage parent-child transforms. This approach allows clean scene structure, reusable coordinate transformations, and easier manipulation of complex object collections.

Handling responsive resizing for a Three.js canvas requires updating the camera aspect ratio and renderer size when the browser window changes. This ensures the 3D scene scales correctly across different viewport dimensions without distortion.

Yes, the approach supports both PerspectiveCamera and OrthographicCamera configurations for 3D applications. PerspectiveCamera simulates real-world depth, while OrthographicCamera maintains parallel projection, useful for isometric data visualizations and technical demos.

You should use quaternions and matrices for transform control in Three.js when managing complex rotations and coordinate system conversions. Quaternions prevent gimbal lock during animation loops, while matrices efficiently compound multiple transformations across Object3D hierarchies.