The following content was copied from #90 (comment)

(1) Retrieval of last position associated with generic tracker

Retrieval of last position associated with generic tracker in
vtkVirtualRealityViewInteractor::GetTrackedDevicePose given
the index is not possible.

⚠️ TODO: Handle retrieval of tracker position associated with generic tracker associated with index.

• ✔️ This is expected to be fixed following the integration of these pull-requests:
  • Fix retrieval of OpenVR last post updating VTK #103
  • COMP: Fix build using renamed API to retrieve OpenVR pose #104

Background:

Add support for generic tracker originally contributed in these commits:

• Kitware/VTK@6083532cf8 (ENH: Exposing the generic tracker openvr device type to downstream projects)
• 59b7d1bf3 (Adding interface and logic to maintain MRML transforms for each generic VR tracker)

but removed following the refactoring done in these commits:

• Kitware/VTK@1aac3fe5f (Create VRInteractorStyle and VRRenderWindowInteractor)
• Kitware/VTK@af0fab486 (Clean up VR and OpenVR classes)
• Kitware/VTK@9bd64d666 (Cleanup and rework of the VRInteractorStyle and subclasses)
• Kitware/VTK@09a478a22 (Cleanup VR camera code and subclasses)

(2) RecognizeComplexGesture is not virtual anymore in base VTK class

⚠️ TODO: Assess with this function should still be overriden with VTK 9.1

Background: The function became non virtual in Kitware/VTK@af0fab486 (Clean up VR and OpenVR classes)

API changes

vtkEventData API changes:

• vtkEventDataButton3D -> vtkEventDataDevice3D

RenderWindow API changes

• GetNumberOfTrackedDevicesForDevice -> GetNumberOfDeviceHandlesForDevice
• GetTrackedDeviceIndexForDevice -> GetDeviceHandleForDevice
• GetTrackedDeviceModel -> GetModelForDevice
• GetTrackedDeviceIndexForDevice -> GetDeviceHandleForDevice

InteractorStyle API changes

• PositionProp sinature updated to include "lwpos" and "lwori"