Method vtkLineWidget

Interaction/Widgets/vtkLineWidget.cxx:101–195

------------------------------------------------------------------------------ Begin the definition of the vtkLineWidget methods

// Begin the definition of the vtkLineWidget methods
//
vtkLineWidget::vtkLineWidget()
{
  this->State = vtkLineWidget::Start;
  this->EventCallbackCommand->SetCallback(vtkLineWidget::ProcessEvents);

  this->Align = vtkLineWidget::XAxis;

  // Build the representation of the widget
  int i;
  // Represent the line
  this->LineSource = vtkLineSource::New();
  this->LineSource->SetResolution(5);
  this->LineMapper = vtkPolyDataMapper::New();
  this->LineMapper->SetInputConnection(this->LineSource->GetOutputPort());
  this->LineActor = vtkActor::New();
  this->LineActor->SetMapper(this->LineMapper);

  // Create the handles
  this->Handle = new vtkActor*[2];
  this->HandleMapper = new vtkPolyDataMapper*[2];
  this->HandleGeometry = new vtkSphereSource*[2];
  for (i = 0; i < 2; i++)
  {
    this->HandleGeometry[i] = vtkSphereSource::New();
    this->HandleGeometry[i]->SetThetaResolution(16);
    this->HandleGeometry[i]->SetPhiResolution(8);
    this->HandleMapper[i] = vtkPolyDataMapper::New();
    this->HandleMapper[i]->SetInputConnection(this->HandleGeometry[i]->GetOutputPort());
    this->Handle[i] = vtkActor::New();
    this->Handle[i]->SetMapper(this->HandleMapper[i]);
  }

  // Define the point coordinates
  double bounds[6];
  bounds[0] = -0.5;
  bounds[1] = 0.5;
  bounds[2] = -0.5;
  bounds[3] = 0.5;
  bounds[4] = -0.5;
  bounds[5] = 0.5;
  this->PlaceFactor = 1.0; // overload parent's value

  // Initial creation of the widget, serves to initialize it
  this->PlaceWidget(bounds);
  this->ClampToBounds = 0;

  // Manage the picking stuff
  this->HandlePicker = vtkCellPicker::New();
  this->HandlePicker->SetTolerance(0.001);
  for (i = 0; i < 2; i++)
  {
    this->HandlePicker->AddPickList(this->Handle[i]);
  }
  this->HandlePicker->PickFromListOn();

  this->LinePicker = vtkCellPicker::New();
  this->LinePicker->SetTolerance(0.005); // need some fluff
  this->LinePicker->AddPickList(this->LineActor);