vtkOpenVRRenderWindow.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkOpenVRRenderWindow_h
#define vtkOpenVRRenderWindow_h
 
#include "vtkEventData.h"             // for enums
#include "vtkOpenVROverlay.h"         // used for ivars
#include "vtkRenderingOpenVRModule.h" // For export macro
#include "vtkSmartPointer.h"          // used for ivars
#include "vtkVRRenderWindow.h"
 
#include <openvr.h> // for ivars
 
VTK_ABI_NAMESPACE_BEGIN
class vtkMatrix4x4;
class vtkOpenVRModel;
 
class VTKRENDERINGOPENVR_EXPORT vtkOpenVRRenderWindow : public vtkVRRenderWindow
{
public:
  static vtkOpenVRRenderWindow* New();
  vtkTypeMacro(vtkOpenVRRenderWindow, vtkVRRenderWindow);

  static bool IsHMDPresent();

  void Initialize() override;

  void Finalize() override;

  vr::IVRSystem* GetHMD() { return this->HMD; }

  vtkRenderWindowInteractor* MakeRenderWindowInteractor() override;

  void Render() override;

  void StereoMidpoint() override;

  void StereoRenderComplete() override;

  void RenderOverlay();
 
  /*
   * Get the overlay to use on the VR dashboard.
   */
  vtkGetSmartPointerMacro(DashboardOverlay, vtkOpenVROverlay);

  void UpdateHMDMatrixPose() override;

  void SetMatrixFromOpenVRPose(vtkMatrix4x4* result, const vr::TrackedDevicePose_t& vrPose);

  vr::IVRRenderModels* GetOpenVRRenderModels() { return this->OpenVRRenderModels; }

  void RenderModels() override;
 
  uint32_t GetDeviceHandleForOpenVRHandle(vr::TrackedDeviceIndex_t index);
  vtkEventDataDevice GetDeviceForOpenVRHandle(vr::TrackedDeviceIndex_t ohandle);


  void GetOpenVRPose(vtkEventDataDevice dev, vr::TrackedDevicePose_t** pose)
  {
    return this->GetOpenVRPose(dev, 0, pose);
  }
  void GetOpenVRPose(vtkEventDataDevice dev, uint32_t index, vr::TrackedDevicePose_t** pose);
 
protected:
  vtkOpenVRRenderWindow();
  ~vtkOpenVRRenderWindow() override;
 
  std::string GetWindowTitleFromAPI() override;
  bool GetSizeFromAPI() override;
 
  bool CreateFramebuffers(uint32_t viewCount = 2) override;
  void RenderFramebuffer(FramebufferDesc& framebufferDesc) override;
  bool CreateOneFramebuffer(int nWidth, int nHeight, FramebufferDesc& framebufferDesc);

  std::string GetTrackedDeviceString(vr::IVRSystem* pHmd, vr::TrackedDeviceIndex_t unDevice,
    vr::TrackedDeviceProperty prop, vr::TrackedPropertyError* peError = nullptr);

  vtkOpenVRModel* FindOrLoadRenderModel(const char* modelName);
 
  vtkSmartPointer<vtkOpenVROverlay> DashboardOverlay;
  vr::IVRSystem* HMD = nullptr;
  vr::IVRRenderModels* OpenVRRenderModels = nullptr;
  vr::TrackedDevicePose_t OpenVRTrackedDevicePoses[vr::k_unMaxTrackedDeviceCount];
 
private:
  vtkOpenVRRenderWindow(const vtkOpenVRRenderWindow&) = delete;
  void operator=(const vtkOpenVRRenderWindow&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif