@three3d/tools/doc/api/tools.computepolylinefrenetframesbyfixup.md

@three3d/tools 提供了 ThreeJS 常用的工具库

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## computePolylineFrenetFramesByFixUp() function

通过固定up方向的方式计算折线的的 FrenetFrames

**Signature:**

```typescript
export declare function computePolylineFrenetFramesByFixUp(points: Vector3[], up: Vector3): {
    tangents: Vector3[];
    normals: Vector3[];
    binormals: Vector3[];
    lengths: number[];
    length: number;
    lines: Line3[];
};
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  points | Vector3\[\] |  |
|  up | Vector3 |  |

**Returns:**

{ tangents: Vector3\[\]; normals: Vector3\[\]; binormals: Vector3\[\]; lengths: number\[\]; length: number; lines: Line3\[\]; }


## Remarks

最后一个顶点的 tangent,normal,binormal 与前一个顶点的相同