@three3d/effect/doc/api/effect.pathgeometry.getnearbyindex.md

@three3d/effect 提供了 ThreeJS 的特效

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[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