Reze Engine

A lightweight engine built with WebGPU and TypeScript for real-time 3D anime character MMD model rendering.

Features

• Blinn-Phong lighting
• Alpha blending
• Post alpha eye rendering (the see-through eyes)
• Rim lighting
• Outlines
• MSAA 4x anti-aliasing
• Bone and morph API
• VMD animation
• IK solver
• Ammo/Bullet physics

Usage

export default function Scene() {
  const canvasRef = useRef < HTMLCanvasElement > null
  const engineRef = useRef < Engine > null

  const initEngine = useCallback(async () => {
    if (canvasRef.current) {
      try {
        const engine = new Engine(canvasRef.current)
        engineRef.current = engine
        await engine.init()
        await engine.loadModel("/models/塞尔凯特/塞尔凯特.pmx")

        engine.runRenderLoop(() => {})
      } catch (error) {
        console.error(error)
      }
    }
  }, [])

  useEffect(() => {
    void (async () => {
      initEngine()
    })()

    return () => {
      if (engineRef.current) {
        engineRef.current.dispose()
      }
    }
  }, [initEngine])

  return <canvas ref={canvasRef} className="w-full h-full" />
}

Engine options

const DEFAULT_ENGINE_OPTIONS: RequiredEngineOptions = {
  ambientColor: new Vec3(0.82, 0.82, 0.82),
  directionalLightIntensity: 0.2,
  minSpecularIntensity: 0.3,
  rimLightIntensity: 0.4,
  cameraDistance: 26.6,
  cameraTarget: new Vec3(0, 12.5, 0),
  cameraFov: Math.PI / 4,
  onRaycast: undefined,
}

Projects Using This Engine

• MiKaPo - Online real-time motion capture for MMD using webcam and MediaPipe
• Popo - Fine-tuned LLM that generates MMD poses from natural language descriptions
• MPL - Semantic motion programming language for scripting MMD animations with intuitive syntax

Tutorial

Learn WebGPU from scratch by building an anime character renderer in incremental steps. The tutorial covers the complete rendering pipeline from a simple triangle to fully textured, skeletal-animated characters.

How to Render an Anime Character with WebGPU