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[Home](./index.md) &gt; [@three3d/effect](./effect.md) &gt; [PathGeometry](./effect.pathgeometry.md) &gt; [getNearbyIndex](./effect.pathgeometry.getnearbyindex.md)

## PathGeometry.getNearbyIndex() method

获取目标长度值附近的索引

**Signature:**

```typescript
getNearbyIndex(length: number, right?: boolean): number;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  length | number | 目标长度值 |
|  right | boolean | _(Optional)_ 是否获取目标值右侧的索引； |

**Returns:**

number

当返回 -1 时，表示没找到