reactPositionsSet( defaultValue: undefined | [number, number, number][][],): ReactiveVariable<undefined | [number, number, number][][]> 参数
- defaultValue: undefined | [number, number, number][][]
返回 ReactiveVariable<undefined | [number, number, number][][]>
https://www.wolai.com/earthsdk/P9YGA3n9PSz4qXXzRJcUU#5cBNbpq7M39J2KsqbFVWE7