函数 reactPositions

reactPositions(
defaultValue: undefined | [number, number, number][],
): ReactiveVariable<undefined | [number, number, number][]>
https://www.wolai.com/earthsdk/P9YGA3n9PSz4qXXzRJcUU#6qVkYWFGpA2DQBesFxNbkT
参数
- defaultValue: undefined | [number, number, number][]
返回 ReactiveVariable<undefined | [number, number, number][]>
- 定义于 earthsdk/earthsdk3/src/xbsj-base/xr-base-utils/ReactiveVariable.ts:367