text: #ifndef MAINWINDOW_H
  #define MAINWINDOW_H
  
  #include <QMainWindow>
  #include <vtkSmartPointer.h>
  #include <vtkPoints.h>
  #include <vtkPolyData.h>
  #include <vtkDoubleArray.h>
  #include <vtkPointData.h>
  #include <vtkFloatArray.h>
  #include <QDebug>
  #include <vtkAutoInit.h>
  VTK_MODULE_INIT(vtkRenderingOpenGL2);
  
  class MainWindow : public QMainWindow
  {
      Q_OBJECT
  
  public:
      MainWindow(QWidget *parent = 0);
      ~MainWindow();
  public:
      void conceptScalars();
  };
  
  #endif // MAINWINDOW_H
  