Function startRotation

startRotation(
    app: VcsApp,
    viewpoint?: Viewpoint,
    timePerRotation?: number,
): Promise<(() => void) | null>
Starts the rotation of the map.
Parameters
- app: VcsApp
  The VCS application instance.
- Optionalviewpoint: Viewpoint
  The optional viewpoint to start the rotation from, if no viewpoint is provided the current Viewpoint is used.
- OptionaltimePerRotation: number = 60
  The duration of a single full rotation in seconds.
Returns Promise<(() => void) | null>
A function to stop the rotation or null, if the rotation could not be started due to missing position.
- Defined in src/util/rotation.ts:100