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# 框架识别特征
## Three.js
**未混淆**`THREE.`, `WebGLRenderer`, `ShaderMaterial`, `BufferGeometry`
**混淆后**(通过构造参数推断):
| 调用模式 | 原始类 |
|---------|--------|
| `new X({canvas, antialias, alpha})` | `WebGLRenderer` |
| `new X(fov, aspect, near, far)` — 4 数字 | `PerspectiveCamera` |
| `new X(-1, 1, 1, -1, 0, 1)` — 6 参数 | `OrthographicCamera` |
| `new X(w, h, {wrapS, minFilter})` | `WebGLRenderTarget` |
| `new X(data, w, h, format, type)` — Float32Array | `DataTexture` |
| `new X(2, 2)` 作为几何体 | `PlaneGeometry` |
| `new X({uniforms, vertexShader, fragmentShader})` | `ShaderMaterial` |
| `X.getElapsedTime()` | `Clock` |
**常量**`ClampToEdgeWrapping`, `NearestFilter`, `RGBAFormat`, `FloatType`, `DoubleSide`
## 2D Canvas
`dataEngine: null` 时,用 `getContext('2d')` 有无 + `createShader`/`shaderSource` 有无区分:
-`getContext('2d')`,无 WebGL 调用 → 纯 2D Canvas
- 有 WebGL 调用 → Raw WebGL / PixiJS
## Raw WebGL
```javascript
gl.createShader / gl.shaderSource / gl.compileShader / gl.createProgram
gl.bindBuffer / gl.bindFramebuffer / gl.drawArrays
```
## PixiJS
`PIXI.Application`, `PIXI.Filter`, `new PIXI.Filter(vertSrc, fragSrc, uniforms)`
## Babylon.js
`BABYLON.Engine`, `BABYLON.ShaderMaterial`, `BABYLON.Effect.ShadersStore`
## GPGPU 模式
两个 `WebGLRenderTarget`ping-pong+ `OrthographicCamera(-1,1,1,-1,0,1)` + `PlaneGeometry(2,2)` + `DataTexture` 初始位置 + `setRenderTarget` 循环
## 常见噪声
| 函数 | 类型 |
|------|------|
| `snoise` | Simplex noise (Ashima) |
| `cnoise` | Classic Perlin |
| `cellular` | Worley/Voronoi |
| `fbm` | Fractal Brownian Motion |