OpenXRHandTracking.h

#pragma once
 
#include <Foundation/Configuration/Singleton.h>
#include <GameEngine/XR/XRHandTrackingInterface.h>
#include <OpenXRPlugin/Basics.h>
#include <OpenXRPlugin/OpenXRIncludes.h>
 
class plOpenXR;
 
class PL_OPENXRPLUGIN_DLL plOpenXRHandTracking : public plXRHandTrackingInterface
{
  PL_DECLARE_SINGLETON_OF_INTERFACE(plOpenXRHandTracking, plXRHandTrackingInterface);
 
public:
  static bool IsHandTrackingSupported(plOpenXR* pOpenXR);
 
public:
  plOpenXRHandTracking(plOpenXR* pOpenXR);
  ~plOpenXRHandTracking();
 
  HandPartTrackingState TryGetBoneTransforms(
    plEnum<plXRHand> hand, plEnum<plXRHandPart> handPart, plEnum<plXRTransformSpace> space, plDynamicArray<plXRHandBone>& out_bones) override;
 
  void UpdateJointTransforms();
 
private:
  friend class plOpenXR;
 
  struct JointData
  {
    PL_DECLARE_POD_TYPE();
    plXRHandBone m_Bone;
    bool m_bValid;
  };
 
  plOpenXR* m_pOpenXR = nullptr;
  XrHandTrackerEXT m_HandTracker[2] = {XR_NULL_HANDLE, XR_NULL_HANDLE};
  XrHandJointLocationEXT m_JointLocations[2][XR_HAND_JOINT_COUNT_EXT];
  XrHandJointVelocityEXT m_JointVelocities[2][XR_HAND_JOINT_COUNT_EXT];
  XrHandJointLocationsEXT m_Locations[2]{XR_TYPE_HAND_JOINT_LOCATIONS_EXT};
  XrHandJointVelocitiesEXT m_Velocities[2]{XR_TYPE_HAND_JOINT_VELOCITIES_EXT};
 
  plStaticArray<JointData, XR_HAND_JOINT_LITTLE_TIP_EXT + 1> m_JointData[2];
  plStaticArray<plUInt32, 6> m_HandParts[plXRHandPart::Little + 1];
};