VRRenderThread.h

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#ifndef VR_RENDER_THREAD_H
#define VR_RENDER_THREAD_H
 
  /* Project headers */
 
  /* Qt headers */
#include <QThread>
#include <QMutex>
#include <QWaitCondition>
 
/* Vtk headers */
#include <vtkActor.h>
#include <vtkOpenVRRenderWindow.h>              
#include <vtkOpenVRRenderWindowInteractor.h>    
#include <vtkOpenVRRenderer.h>                  
#include <vtkOpenVRCamera.h>    
#include <vtkActorCollection.h>
#include <vtkCommand.h>
#include <openvr.h>
 
 
 
/* Note that this class inherits from the Qt class QThread which allows it to be a parallel thread
 * to the main() thread.
 */
class VRRenderThread : public QThread {
    Q_OBJECT
 
public:
    enum {
        END_RENDER,
        ROTATE_X,
        ROTATE_Y,
        ROTATE_Z
    } Command;
 
 
    VRRenderThread(QObject* parent = nullptr);
 
    ~VRRenderThread();
 
    void addActorOffline(vtkActor* actor);
 
 
    void issueCommand(int cmd, double value);
 
 
protected:
    void run() override;
 
private:
    /* Standard VTK VR Classes */
    vtkSmartPointer<vtkOpenVRRenderWindow>              window;
    vtkSmartPointer<vtkOpenVRRenderWindowInteractor>    interactor;
    vtkSmartPointer<vtkOpenVRRenderer>                  renderer;
    vtkSmartPointer<vtkOpenVRCamera>                    camera;
 
    /* Use to synchronise passing of data to VR thread */
    QMutex                                              mutex;
    QWaitCondition                                      condition;
 
    vtkSmartPointer<vtkActorCollection>                 actors;
 
    std::chrono::time_point<std::chrono::steady_clock>  t_last;
 
    bool                                                endRender;
 
    /* Some variables to indicate animation actions to apply.
     *
     */
    double rotateX;         /*< Degrees to rotate around X axis (per time-step) */
    double rotateY;         /*< Degrees to rotate around Y axis (per time-step) */
    double rotateZ;         /*< Degrees to rotate around Z axis (per time-step) */
};
 
 
 
#endif
#pragma once