@three3d/effect
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@three3d/effect 提供了 ThreeJS 的特效
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[Home](./index.md) > [@three3d/effect](./effect.md) > [PathGeometryOptions](./effect.pathgeometryoptions.md) > [startLength](./effect.pathgeometryoptions.startlength.md)
## PathGeometryOptions.startLength property
路径起始位置处的长度
**Signature:**
```typescript
startLength?: number;
```