Advanced Three.js 3D Visualization: Grid Helpers, Line Rendering, GUI Controls, Animations, Bezier Connections, Particle Tornado, and Bloom Effects

This article presents a step‑by‑step guide for creating complex 3D scenes using Three.js and TypeScript.

It starts with a project file structure, lists the dependencies (three, @tweenjs/tween.js, dat.gui, etc.), and shows how to configure the tech stack (three, vite, typescript).

Key components include:

Creating a THREE.GridHelper with custom user data for lighting control.

Generating lines via LineGeometry and Line2 , with functions createLine and lineMaterial that support color, opacity, width, and dashed styles.

Implementing a GUI using dat.GUI to adjust shape and material colors in real time.

Adding warning tags and panels with CSS2DObject for 2D overlays.

Animating warning lines using TWEEN.Tween for opening/closing animations.

Drawing bezier connection lines with THREE.CubicBezierCurve3 and updating their geometry dynamically.

Simulating a tornado using a particle system ( THREE.BufferGeometry , custom shaders) and animating its position and orientation.

Applying Unreal Bloom post‑processing via EffectComposer , UnrealBloomPass , and custom shader passes to achieve realistic glow effects.

Utility functions such as updateLine , update , and update2 manage geometry updates during animations, while darkenNonBloomed and restoreMaterial handle selective bloom rendering.

The article concludes with integration tips for the render loop, showing how to combine the animation updates, tween updates, controls, and the custom unrealRender function to produce a fully interactive, animated 3D visualization.