<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [@three3d/effect](./effect.md) &gt; [CreateBandGeometryDataOptions](./effect.createbandgeometrydataoptions.md) &gt; [preLength](./effect.createbandgeometrydataoptions.prelength.md)

## CreateBandGeometryDataOptions.preLength property

上一个点的长度

**Signature:**

```typescript
preLength?: number;
```