[vtkusers] how can I scale a vtkActor2D?

[Liang Ma]

Sorry, still not clear last time.


// remove old actors
    this->pvtkRenderer->RemoveActor(this->pvtkActor);
    this->pvtkRenderer->RemoveActor(this->pvtkActor2D);

    // read new data of 3D model from a STL file
    if (!this->pvtkSTLReader)
      this->pvtkSTLReader = vtkSTLReader::New();
    this->pvtkSTLReader->SetFileName(cFileDialog.GetPathName());

 //Cut the 3D model
    m_VTKPD_data = pvtkSTLReader->GetOutput();
    m_VTKPD_data->Update();
    m_dOrigin1 = m_VTKPD_data->GetCenter();
    this->cplane->SetOrigin(m_dOrigin1[0], m_dOrigin1[1], m_dOrigin1[2]);
    float normal_x = 0;
    float normal_y = 0;
    float normal_z = 1;
    cplane->SetNormal(normal_x, normal_y, normal_z);

    planeCut->SetInput(m_VTKPD_data);
    planeCut->SetCutFunction(cplane);

// Setmapper
 this->pvtkDataSetMapper->SetInput(planeCut->GetOutput());
 this->pvtkActor->SetMapper(this->pvtkDataSetMapper);

// Try to scale the 2D actor
       this->pvtkActor->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();
      this->pvtkActor->GetPositionCoordinate()->SetValue(0.3, 0.5);
       this->pvtkActor->GetPosition2Coordinate()->SetValue(0.9, 0.9);
       this->pvtkActor->GetProperty()->SetColor(1, 0, 0);

// Add the txt of thefile name
     this->pvtkTextMapper->SetInput(pvtkSTLReader->GetFileName());
      this->pvtkTextMapper->GetTextProperty()->SetFontSize(12);
     this->pvtkActor2D->SetMapper(this->pvtkTextMapper);

// Set background and add actors to render 
this->pvtkRenderer->SetBackground(0.4,0.4,0.4);
        this->pvtkRenderer->AddActor(this->pvtkActor);
       this->pvtkRenderer->AddActor(this->pvtkActor2D);

    // try to zoom, then render
      this->pvtkRenderer->GetActiveCamera()->Zoom(5);
      this->pvtkRenderer->GetRenderWindow()->Render();