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[Home](./index.md) &gt; [@three3d/effect](./effect.md) &gt; [CreateBandGeometryDataOptions](./effect.createbandgeometrydataoptions.md) &gt; [preIndex](./effect.createbandgeometrydataoptions.preindex.md)

## CreateBandGeometryDataOptions.preIndex property

上一个点的索引

**Signature:**

```typescript
preIndex?: number;
```

## Remarks

索引从哪里开始