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[Home](./index.md) &gt; [@three3d/effect](./effect.md) &gt; [BandGeometry](./effect.bandgeometry.md) &gt; [useU](./effect.bandgeometry.useu.md)

## BandGeometry.useU property

是否固定 up；保证up不变

**Signature:**

```typescript
get useU(): boolean;

set useU(value: boolean);
```