@cearth/tools/doc/api/tools.computenormalofcoplanars.md

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## computeNormalOfCoplanars() function

计算三个点所在的平面的法向量

**Signature:**

```typescript
export declare function computeNormalOfCoplanars(origin: Cartesian3, point1: Cartesian3, point2: Cartesian3): Cartesian3;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

origin


</td><td>

Cartesian3


</td><td>

原点


</td></tr>
<tr><td>

point1


</td><td>

Cartesian3


</td><td>

点1


</td></tr>
<tr><td>

point2


</td><td>

Cartesian3


</td><td>

点2


</td></tr>
</tbody></table>
**Returns:**

Cartesian3

法线