@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) > [PathGeometry](./effect.pathgeometry.md) > [getClosestIndex](./effect.pathgeometry.getclosestindex.md)
## PathGeometry.getClosestIndex() method
获取与指定长度值最近的索引
**Signature:**
```typescript
getClosestIndex(length: number): number;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| length | number | 目标长度值 |
**Returns:**
number