#include <G4VtkViewer.hh>

Inheritance diagram for vtkInfoCallback:

Public Member Functions
	vtkInfoCallback ()

void	SetTextActor (vtkTextActor *txt)

void	Execute (vtkObject caller, unsigned long, void ) override

Static Public Member Functions
static vtkInfoCallback *	New ()

Protected Attributes
vtkTextActor *	TextActor

char	TextBuff [256]

std::chrono::time_point< std::chrono::steady_clock >	t1

std::chrono::time_point< std::chrono::steady_clock >	t2

Detailed Description

Definition at line 112 of file G4VtkViewer.hh.

Constructor & Destructor Documentation

◆ vtkInfoCallback()

vtkInfoCallback::vtkInfoCallback ( )

inline

Definition at line 117 of file G4VtkViewer.hh.

    {
      t1 = std::chrono::steady_clock::now();
      t2 = std::chrono::steady_clock::now();
    }

Referenced by New().

Member Function Documentation

◆ Execute()

void vtkInfoCallback::Execute	(	vtkObject *	caller,
		unsigned long	,
		void *	)

inlineoverride

Definition at line 124 of file G4VtkViewer.hh.

    {
      auto ren = static_cast<vtkRenderer*>(caller);
      int nActors = ren->GetActors()->GetNumberOfItems();
      vtkCamera* cam = ren->GetActiveCamera();
      if (cam == nullptr) return;
 
      double* pos = cam->GetPosition();
      double* foc = cam->GetFocalPoint();
      double viewAngle = cam->GetViewAngle();
      double distance = cam->GetDistance();
      double near;
      double far;
      cam->GetClippingRange(near,far);
      double parallelScale = cam->GetParallelScale();
 
 
      if (pos == nullptr) return;
 
      // Get current time
      t2 = std::chrono::steady_clock::now();
 
      // Frame rate calculation
      std::chrono::duration<double> tdiff = t2 - t1;
      t1 = t2;
      float fps = 1.0 / tdiff.count();
 
      // String for display
      snprintf(this->TextBuff, sizeof this->TextBuff,
               "camera position    : %.1f %.1f %.1f \n"
               "camera focal point : %.1f %.1f %.1f \n"
               "view angle         : %.1f\n"
               "distance           : %.1f\n"
               "clip near/far      : %.1f %.1f\n"
               "parallel scale     : %.1f\n"
               "number actors      : %i\n"
               "fps                : %.1f",
               pos[0], pos[1], pos[2], foc[0], foc[1], foc[2], viewAngle, distance, near, far, parallelScale,
               nActors, fps);
      if (this->TextActor != nullptr) {
        this->TextActor->SetInput(this->TextBuff);
      }
    }