text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkAbstractPolygonalHandleRepresentation3D.cxx
  
    Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
    All rights reserved.
    See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
  
       This software is distributed WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.  See the above copyright notice for more information.
  
  =========================================================================*/
  #include "vtkAbstractPolygonalHandleRepresentation3D.h"
  #include "vtkCursor3D.h"
  #include "vtkPolyDataMapper.h"
  #include "vtkActor.h"
  #include "vtkCellPicker.h"
  #include "vtkRenderer.h"
  #include "vtkRenderWindowInteractor.h"
  #include "vtkObjectFactory.h"
  #include "vtkPickingManager.h"
  #include "vtkProperty.h"
  #include "vtkAssemblyPath.h"
  #include "vtkMath.h"
  #include "vtkInteractorObserver.h"
  #include "vtkLine.h"
  #include "vtkCoordinate.h"
  #include "vtkRenderWindow.h"
  #include "vtkFocalPlanePointPlacer.h"
  #include "vtkCamera.h"
  #include "vtkTransformPolyDataFilter.h"
  #include "vtkMatrixToLinearTransform.h"
  #include "vtkMatrix4x4.h"
  #include "vtkVectorText.h"
  #include "vtkFollower.h"
  
  vtkCxxSetObjectMacro(vtkAbstractPolygonalHandleRepresentation3D,Property,vtkProperty);
  vtkCxxSetObjectMacro(vtkAbstractPolygonalHandleRepresentation3D,SelectedProperty,vtkProperty);
  
  //----------------------------------------------------------------------
  vtkAbstractPolygonalHandleRepresentation3D
  ::vtkAbstractPolygonalHandleRepresentation3D()
  {
    this->InteractionState = vtkHandleRepresentation::Outside;
  
    this->HandleTransformFilter = vtkTransformPolyDataFilter::New();
    this->HandleTransform       = vtkMatrixToLinearTransform::New();
    this->HandleTransformMatrix = vtkMatrix4x4::New();
    this->HandleTransformMatrix->Identity();
    this->HandleTransform->SetInput( this->HandleTransformMatrix );
    this->HandleTransformFilter->SetTransform( this->HandleTransform );
  
    // initialized because it is used in PrintSelf
    this->LastPickPosition[0]=0.0;
    this->LastPickPosition[1]=0.0;
    this->LastPickPosition[2]=0.0;
  
    // initialized because it is used in PrintSelf
    this->LastEventPosition[0]=0.0;
    this->LastEventPosition[1]=0.0;
  
    this->Mapper = vtkPolyDataMapper::New();
    this->Mapper->ScalarVisibilityOff();
    this->Mapper->SetInputConnection(
      this->HandleTransformFilter->GetOutputPort());
  
    // Set up the initial properties
    this->CreateDefaultProperties();
  
    this->Actor = NULL; // Created by subclass.vtkFollower::New();
  
    // Manage the picking stuff
    this->HandlePicker = vtkCellPicker::New();
    this->HandlePicker->PickFromListOn();
    this->HandlePicker->SetTolerance(0.01); //need some fluff
  
    // Override superclass'
    this->PlaceFactor = 1.0;
    this->WaitingForMotion = 0;
    this->ConstraintAxis = -1;
  
    vtkFocalPlanePointPlacer *pointPlacer = vtkFocalPlanePointPlacer::New();
    this->SetPointPlacer( pointPlacer );
    pointPlacer->Delete();
  
    // Label stuff.
    this->LabelAnnotationTextScaleInitialized = false;
    this->LabelVisibility = 0;
    this->HandleVisibility = 1;
    this->LabelTextInput = vtkVectorText::New();
    this->LabelTextInput->SetText( "0" );
    this->LabelTextMapper = vtkPolyDataMapper::New();
    this->LabelTextMapper->SetInputConnection(
      this->LabelTextInput->GetOutputPort());
    this->LabelTextActor = vtkFollower::New();
    this->LabelTextActor->SetMapper(this->LabelTextMapper);
    this->LabelTextActor->GetProperty()->SetColor( 1.0, 0.1, 0.0 );
  
    this->SmoothMotion = 1;
  }
  
  //----------------------------------------------------------------------
  vtkAbstractPolygonalHandleRepresentation3D
  ::~vtkAbstractPolygonalHandleRepresentation3D()
  {
    this->HandleTransformFilter->Delete();
    this->HandleTransform->Delete();
    this->HandleTransformMatrix->Delete();
    this->HandlePicker->Delete();
    this->Mapper->Delete();
    this->Actor->Delete();
    this->Property->Delete();
    this->SelectedProperty->Delete();
    this->LabelTextInput->Delete();
    this->LabelTextMapper->Delete();
    this->LabelTextActor->Delete();
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::RegisterPickers()
  {
    this->Renderer->GetRenderWindow()->GetInteractor()->GetPickingManager()
      ->AddPicker(this->HandlePicker, this);
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::SetHandle( vtkPolyData * pd )
  {
    this->HandleTransformFilter->SetInputData( pd );
  }
  
  //----------------------------------------------------------------------
  vtkPolyData * vtkAbstractPolygonalHandleRepresentation3D::GetHandle()
  {
    return vtkPolyData::SafeDownCast(this->HandleTransformFilter->GetInput());
  }
  
  //-------------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::SetWorldPosition(double p[3])
  {
    if (!this->Renderer || !this->PointPlacer ||
                            this->PointPlacer->ValidateWorldPosition( p ))
    {
      this->WorldPosition->SetValue( p );
      this->WorldPositionTime.Modified();
      this->Modified();
    }
  }
  
  //-------------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::SetDisplayPosition(double p[3])
  {
    if (this->Renderer && this->PointPlacer)
    {
      if (this->PointPlacer->ValidateDisplayPosition( this->Renderer, p))
      {
        double worldPos[3], worldOrient[9];
        if (this->PointPlacer->ComputeWorldPosition(
              this->Renderer, p, worldPos, worldOrient ))
        {
          this->DisplayPosition->SetValue(p);
          this->WorldPosition->SetValue(worldPos);
          this->DisplayPositionTime.Modified();
          this->SetWorldPosition(this->WorldPosition->GetValue());
        }
      }
    }
    else
    {
      this->DisplayPosition->SetValue(p);
      this->DisplayPositionTime.Modified();
    }
  }
  
  //-------------------------------------------------------------------------
  int vtkAbstractPolygonalHandleRepresentation3D
  ::ComputeInteractionState(int X, int Y, int vtkNotUsed(modify))
  {
    this->VisibilityOn(); //actor must be on to be picked
    vtkAssemblyPath* path = this->GetAssemblyPath(X, Y, 0., this->HandlePicker);
  
    if ( path != NULL )
    {
      this->InteractionState = vtkHandleRepresentation::Nearby;
    }
    else
    {
      this->InteractionState = vtkHandleRepresentation::Outside;
      if ( this->ActiveRepresentation )
      {
        this->VisibilityOff();
      }
    }
  
    return this->InteractionState;
  }
  
  //-------------------------------------------------------------------------
  int vtkAbstractPolygonalHandleRepresentation3D::DetermineConstraintAxis(
    int constraint, double *x, double *startPickPoint)
  {
    // Look for trivial cases
    if ( ! this->Constrained )
    {
      return -1;
    }
    else if ( constraint >= 0 && constraint < 3 )
    {
      return constraint;
    }
  
    // Okay, figure out constraint. First see if the choice is
    // outside the hot spot
    if ( ! x )
    {
      double p[3];
      this->HandlePicker->GetPickPosition(p);
      if ( vtkMath::Distance2BetweenPoints(p,this->LastPickPosition) > 0.0)
      {
        this->WaitingForMotion = 0;
        return 0;
      }
      else
      {
        this->WaitingForMotion = 1;
        this->WaitCount = 0;
        return -1;
      }
    }
    else if (x)
    {
      this->WaitingForMotion = 0;
      double v[3];
      v[0] = fabs(x[0] - startPickPoint[0]);
      v[1] = fabs(x[1] - startPickPoint[1]);
      v[2] = fabs(x[2] - startPickPoint[2]);
      return ( v[0]>v[1] ? (v[0]>v[2]?0:2) : (v[1]>v[2]?1:2));
    }
    else
    {
      return -1;
    }
  }
  
  //----------------------------------------------------------------------
  // Record the current event position, and the rectilinear wipe position.
  void vtkAbstractPolygonalHandleRepresentation3D::StartWidgetInteraction(double startEventPos[2])
  {
    this->StartEventPosition[0] = startEventPos[0];
    this->StartEventPosition[1] = startEventPos[1];
    this->StartEventPosition[2] = 0.0;
  
    this->LastEventPosition[0] = startEventPos[0];
    this->LastEventPosition[1] = startEventPos[1];
  
    vtkAssemblyPath* path = this->GetAssemblyPath(
      startEventPos[0], startEventPos[1], 0., this->HandlePicker);
  
    // Did we pick the handle ?
    if ( path )
    {
      this->InteractionState = vtkHandleRepresentation::Nearby;
      this->ConstraintAxis = -1;
      this->HandlePicker->GetPickPosition(this->LastPickPosition);
    }
    else
    {
      this->InteractionState = vtkHandleRepresentation::Outside;
      this->ConstraintAxis = -1;
    }
    this->WaitCount = 0;
  }
  
  //----------------------------------------------------------------------
  // Based on the displacement vector (computed in display coordinates) and
  // the cursor state (which corresponds to which part of the widget has been
  // selected), the widget points are modified.
  // First construct a local coordinate system based on the display coordinates
  // of the widget.
  void vtkAbstractPolygonalHandleRepresentation3D::WidgetInteraction(double eventPos[2])
  {
    // Do different things depending on state
    // Calculations everybody does
    double focalPoint[4], pickPoint[4], prevPickPoint[4], startPickPoint[4], z;
  
    // Compute the two points defining the motion vector
    vtkInteractorObserver::ComputeWorldToDisplay(
        this->Renderer,
        this->LastPickPosition[0],
        this->LastPickPosition[1],
        this->LastPickPosition[2], focalPoint);
    z = focalPoint[2];
    vtkInteractorObserver::ComputeDisplayToWorld(
        this->Renderer,
        this->LastEventPosition[0],
        this->LastEventPosition[1], z, prevPickPoint);
    vtkInteractorObserver::ComputeDisplayToWorld(
        this->Renderer, eventPos[0], eventPos[1], z, pickPoint);
  
    // Process the motion
    if ( this->InteractionState == vtkHandleRepresentation::Selecting ||
         this->InteractionState == vtkHandleRepresentation::Translating )
    {
      this->WaitCount++;
  
      if ( this->WaitCount > 3 || !this->Constrained )
      {
        vtkInteractorObserver::ComputeDisplayToWorld(
            this->Renderer,
            this->StartEventPosition[0],
            this->StartEventPosition[1], z, startPickPoint);
  
        this->ConstraintAxis = this->DetermineConstraintAxis(
            this->ConstraintAxis,pickPoint, startPickPoint);
  
        if (    this->InteractionState == vtkHandleRepresentation::Selecting )
        {
          // If we are doing axis constrained motion, igonore the placer.
          // Can't have both the placer and an axis constraint dictating
          // handle placement.
          if (this->ConstraintAxis >= 0 || this->Constrained || !this->PointPlacer)
          {
            this->MoveFocus( prevPickPoint, pickPoint );
          }
          else
          {
            double newCenterPointRequested[3]; // displayPosition
            double newCenterPoint[3], worldOrient[9];
  
            // Make a request for the new position.
            this->MoveFocusRequest( prevPickPoint,
                                    pickPoint,
                                    eventPos,
                                    newCenterPointRequested );
  
            vtkFocalPlanePointPlacer * fPlacer
              = vtkFocalPlanePointPlacer::SafeDownCast( this->PointPlacer );
            if (fPlacer)
            {
              // Offset the placer plane to one that passes through the current
              // world position and is parallel to the focal plane. Offset =
              // the distance currentWorldPos is from the focal plane
              //
              double currentWorldPos[3], projDir[3], fp[3];
              this->GetWorldPosition( currentWorldPos );
              this->Renderer->GetActiveCamera()->GetFocalPoint(fp);
              double vec[3] = { currentWorldPos[0] - fp[0],
                                currentWorldPos[1] - fp[1],
                                currentWorldPos[2] - fp[2]};
              this->Renderer->GetActiveCamera()->GetDirectionOfProjection(projDir);
              fPlacer->SetOffset( vtkMath::Dot( vec, projDir ) );
            }
  
  
            // See what the placer says.
            if (this->PointPlacer->ComputeWorldPosition(
                  this->Renderer, newCenterPointRequested, newCenterPoint,
                  worldOrient ))
            {
              // Once the placer has validated us, update the handle position
              this->SetWorldPosition( newCenterPoint );
            }
          }
        }
        else
        {
          // If we are doing axis constrained motion, igonore the placer.
          // Can't have both the placer and the axis constraint dictating
          // handle placement.
          if (this->ConstraintAxis >= 0 || this->Constrained || !this->PointPlacer)
          {
            this->Translate(prevPickPoint, pickPoint);
          }
          else
          {
            double newCenterPointRequested[3]; // displayPosition
            double newCenterPoint[3], worldOrient[9];
  
            // Make a request for the new position.
            this->MoveFocusRequest( prevPickPoint,
                                    pickPoint,
                                    eventPos,
                                    newCenterPointRequested);
  
            vtkFocalPlanePointPlacer * fPlacer
              = vtkFocalPlanePointPlacer::SafeDownCast( this->PointPlacer );
            if (fPlacer)
            {
              // Offset the placer plane to one that passes through the current
              // world position and is parallel to the focal plane. Offset =
              // the distance currentWorldPos is from the focal plane
              //
              double currentWorldPos[3], projDir[3], fp[3];
              this->GetWorldPosition( currentWorldPos );
              this->Renderer->GetActiveCamera()->GetFocalPoint(fp);
              double vec[3] = { currentWorldPos[0] - fp[0],
                                currentWorldPos[1] - fp[1],
                                currentWorldPos[2] - fp[2]};
              this->Renderer->GetActiveCamera()->GetDirectionOfProjection(projDir);
              fPlacer->SetOffset( vtkMath::Dot( vec, projDir ) );
            }
  
            // See what the placer says.
            if (this->PointPlacer->ComputeWorldPosition(
                  this->Renderer, newCenterPointRequested, newCenterPoint,
                  worldOrient ))
            {
              this->SetWorldPosition( newCenterPoint );
            }
          }
        }
      }
    }
  
    else if ( this->InteractionState == vtkHandleRepresentation::Scaling )
    {
      // Scaling does not change the position of the handle, we needn't
      // ask the placer..
      this->Scale(prevPickPoint, pickPoint, eventPos);
    }
  
    // Book keeping
    this->LastEventPosition[0] = eventPos[0];
    this->LastEventPosition[1] = eventPos[1];
  
    this->Modified();
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D
  ::MoveFocusRequest(double *p1, double *p2,
                     double currPos[2], double center[3])
  {
    if (this->SmoothMotion)
    {
      double focus[4];
      this->GetWorldPosition(focus);
  
      // Move the center of the handle along the motion vector
      focus[0] += (p2[0] - p1[0]);
      focus[1] += (p2[1] - p1[1]);
      focus[2] += (p2[2] - p1[2]);
      focus[3] = 1.0;
  
      // Get the display position that this center would fall on.
      this->Renderer->SetWorldPoint( focus );
      this->Renderer->WorldToDisplay();
      this->Renderer->GetDisplayPoint( center );
    }
    else
    {
      center[0] = currPos[0];
      center[1] = currPos[1];
      center[2] = 1.0;
    }
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::MoveFocus(double *p1, double *p2)
  {
    //Get the motion vector
    double v[3];
    v[0] = p2[0] - p1[0];
    v[1] = p2[1] - p1[1];
    v[2] = p2[2] - p1[2];
  
    double focus[3];
    this->GetWorldPosition( focus );
    if ( this->ConstraintAxis >= 0 )
    {
      focus[this->ConstraintAxis] += v[this->ConstraintAxis];
    }
    else
    {
      focus[0] += v[0];
      focus[1] += v[1];
      focus[2] += v[2];
    }
  
    this->SetWorldPosition(focus);
  }
  
  //----------------------------------------------------------------------
  // Translate everything
  void vtkAbstractPolygonalHandleRepresentation3D::Translate(double *p1, double *p2)
  {
    //Get the motion vector
    double v[3], pos[3];
    v[0] = p2[0] - p1[0];
    v[1] = p2[1] - p1[1];
    v[2] = p2[2] - p1[2];
  
    this->GetWorldPosition( pos );
    double newFocus[3];
    int i;
  
    if ( this->ConstraintAxis >= 0 )
    {//move along axis
      for (i=0; i<3; i++)
      {
        if ( i != this->ConstraintAxis )
        {
          v[i] = 0.0;
        }
      }
    }
  
    for (i=0; i<3; i++)
    {
      newFocus[i] = pos[i] + v[i];
    }
  
    this->SetWorldPosition(newFocus);
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D
  ::Scale(double *, double *, double eventPos[2])
  {
    double sf = 1.0 + (eventPos[1] - this->LastEventPosition[1])
                     / this->Renderer->GetSize()[1];
    if (sf == 1.0)
    {
      return;
    }
  
    double handleSize = this->HandleTransformMatrix->GetElement(0,0) * sf;
    handleSize = (handleSize < 0.001 ? 0.001 : handleSize);
  
    this->SetUniformScale( handleSize );
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D
  ::SetUniformScale(double handleSize)
  {
    this->HandleTransformMatrix->SetElement(0, 0, handleSize);
    this->HandleTransformMatrix->SetElement(1, 1, handleSize);
    this->HandleTransformMatrix->SetElement(2, 2, handleSize);
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::Highlight(int highlight)
  {
    this->Actor->SetProperty(highlight ? this->SelectedProperty : this->Property);
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::CreateDefaultProperties()
  {
    this->Property = vtkProperty::New();
    this->Property->SetLineWidth(0.5);
  
    this->SelectedProperty = vtkProperty::New();
    this->SelectedProperty->SetAmbient(1.0);
    this->SelectedProperty->SetAmbientColor(0.0,1.0,0.0);
    this->SelectedProperty->SetLineWidth(2.0);
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::UpdateHandle()
  {
    // Subclasses should override this.
    this->HandleTransformFilter->Update();
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::BuildRepresentation()
  {
    // The net effect is to resize the handle
    if ( this->GetMTime() > this->BuildTime ||
         (this->Renderer && this->Renderer->GetVTKWindow() &&
          this->Renderer->GetVTKWindow()->GetMTime() > this->BuildTime) )
    {
  
      // Update the handle.
      this->UpdateHandle();
  
      // Update the label,
      this->UpdateLabel();
  
      this->BuildTime.Modified();
    }
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::UpdateLabel()
  {
    // Display the label if needed.
    if (this->LabelVisibility)
    {
      if (this->Renderer)
      {
        this->LabelTextActor->SetCamera( this->Renderer->GetActiveCamera() );
      }
      else
      {
        vtkErrorMacro("UpdateLabel: no renderer has been set!");
        return;
      }
  
      // Place the label on the North east of the handle. We need to take into
      // account the viewup vector and the direction of the camera, so that we
      // can bring it on the closest plane of the widget facing the camera.
      double labelPosition[3], vup[3], directionOfProjection[3], xAxis[3], bounds[6];
      this->Renderer->GetActiveCamera()->GetViewUp(vup);
      this->Renderer->GetActiveCamera()->GetDirectionOfProjection(directionOfProjection);
      vtkMath::Cross( directionOfProjection, vup, xAxis );
      this->Mapper->GetBounds(bounds);
      double width = sqrt( (bounds[1] - bounds[0]) * (bounds[1] - bounds[0]) +
                           (bounds[3] - bounds[2]) * (bounds[3] - bounds[2]) +
                           (bounds[5] - bounds[4]) * (bounds[5] - bounds[4]) );
      this->GetWorldPosition(labelPosition);
      labelPosition[0] += width/2.0 * xAxis[0];
      labelPosition[1] += width/2.0 * xAxis[1];
      labelPosition[2] += width/2.0 * xAxis[2];
  
      this->LabelTextActor->SetPosition(labelPosition);
  
      if (!this->LabelAnnotationTextScaleInitialized)
      {
        // If a font size hasn't been specified by the user, scale the text
        // (font size) according to the size of the handle .
        this->LabelTextActor->SetScale(
            width/3.0, width/3.0, width/3.0 );
      }
    }
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::ShallowCopy(vtkProp *prop)
  {
    vtkAbstractPolygonalHandleRepresentation3D *rep =
      vtkAbstractPolygonalHandleRepresentation3D::SafeDownCast(prop);
    if ( rep )
    {
      this->SetProperty(rep->GetProperty());
      this->SetSelectedProperty(rep->GetSelectedProperty());
      this->Actor->SetProperty(this->Property);
  
      // copy the handle shape
      this->HandleTransformFilter->SetInputConnection(
        rep->HandleTransformFilter->GetInputConnection(0, 0));
  
      this->LabelVisibility = rep->LabelVisibility;
      this->SetLabelText( rep->GetLabelText() );
    }
    this->Superclass::ShallowCopy(prop);
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::DeepCopy(vtkProp *prop)
  {
    vtkAbstractPolygonalHandleRepresentation3D *rep =
      vtkAbstractPolygonalHandleRepresentation3D::SafeDownCast(prop);
    if ( rep )
    {
      this->Property->DeepCopy(rep->GetProperty());
      this->SelectedProperty->DeepCopy(rep->GetSelectedProperty());
      this->Actor->SetProperty(this->Property);
  
      // copy the handle shape
      vtkPolyData *pd = vtkPolyData::New();
      pd->DeepCopy( rep->HandleTransformFilter->GetInput() );
      this->HandleTransformFilter->SetInputData(pd);
      pd->Delete();
  
      this->LabelVisibility = rep->LabelVisibility;
      this->SetLabelText( rep->GetLabelText() );
    }
    this->Superclass::DeepCopy(prop);
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::GetActors(vtkPropCollection *pc)
  {
    this->Actor->GetActors(pc);
    this->LabelTextActor->GetActors(pc);
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::ReleaseGraphicsResources(vtkWindow *win)
  {
    this->Actor->ReleaseGraphicsResources(win);
    this->LabelTextActor->ReleaseGraphicsResources(win);
  }
  
  //----------------------------------------------------------------------
  int vtkAbstractPolygonalHandleRepresentation3D::RenderOpaqueGeometry(vtkViewport *viewport)
  {
    int count=0;
    this->BuildRepresentation();
    if (this->HandleVisibility)
    {
      count += this->Actor->RenderOpaqueGeometry(viewport);
    }
    if (this->LabelVisibility)
    {
      count += this->LabelTextActor->RenderOpaqueGeometry(viewport);
    }
    return count;
  }
  
  //-----------------------------------------------------------------------------
  int vtkAbstractPolygonalHandleRepresentation3D::RenderTranslucentPolygonalGeometry(
    vtkViewport *viewport)
  {
    int count=0;
    if (this->HandleVisibility)
    {
      count += this->Actor->RenderTranslucentPolygonalGeometry(viewport);
    }
    if (this->LabelVisibility)
    {
      count += this->LabelTextActor->RenderTranslucentPolygonalGeometry(viewport);
    }
    return count;
  }
  
  //-----------------------------------------------------------------------------
  int vtkAbstractPolygonalHandleRepresentation3D::HasTranslucentPolygonalGeometry()
  {
    int result=0;
    this->BuildRepresentation();
    if (this->HandleVisibility)
    {
      result |= this->Actor->HasTranslucentPolygonalGeometry();
    }
    if (this->LabelVisibility)
    {
      result |= this->LabelTextActor->HasTranslucentPolygonalGeometry();
    }
    return result;
  }
  
  //-----------------------------------------------------------------------------
  double* vtkAbstractPolygonalHandleRepresentation3D::GetBounds()
  {
    this->BuildRepresentation();
    return this->Actor ? this->Actor->GetBounds() : NULL;
  }
  
  //-----------------------------------------------------------------------------
  vtkAbstractTransform* vtkAbstractPolygonalHandleRepresentation3D::GetTransform()
  {
    return this->HandleTransform;
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::SetLabelText( const char *s )
  {
    this->LabelTextInput->SetText(s);
  }
  
  //----------------------------------------------------------------------
  char * vtkAbstractPolygonalHandleRepresentation3D::GetLabelText()
  {
    return this->LabelTextInput->GetText();
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::SetLabelTextScale( double scale[3] )
  {
    this->LabelTextActor->SetScale( scale );
    this->LabelAnnotationTextScaleInitialized = true;
  }
  
  //----------------------------------------------------------------------
  double * vtkAbstractPolygonalHandleRepresentation3D::GetLabelTextScale()
  {
    return this->LabelTextActor->GetScale();
  }
  
  //----------------------------------------------------------------------
  void vtkAbstractPolygonalHandleRepresentation3D::PrintSelf(ostream& os, vtkIndent indent)
  {
    this->Superclass::PrintSelf(os,indent);
  
    if ( this->Property )
    {
      os << indent << "Property: " << this->Property << "\n";
    }
    else
    {
      os << indent << "Property: (none)\n";
    }
    if ( this->SelectedProperty )
    {
      os << indent << "Selected Property: " << this->SelectedProperty << "\n";
    }
    else
    {
      os << indent << "Selected Property: (none)\n";
    }
    os << indent << "LabelVisibility: " << this->LabelVisibility << endl;
    os << indent << "HandleVisibility: " << this->HandleVisibility << endl;
    os << indent << "Actor: " << this->Actor << "\n";
    this->Actor->PrintSelf(os,indent.GetNextIndent());
    os << indent << "LabelTextActor: " << this->LabelTextActor << endl;
    this->LabelTextActor->PrintSelf(os,indent.GetNextIndent());
    os << indent << "Mapper: " << this->Mapper << "\n";
    this->Mapper->PrintSelf(os,indent.GetNextIndent());
    os << indent << "HandleTransformFilter: " << this->HandleTransformFilter << "\n";
    this->HandleTransformFilter->PrintSelf(os,indent.GetNextIndent());
    os << indent << "HandleTransform: " << this->HandleTransform << "\n";
    this->HandleTransform->PrintSelf(os,indent.GetNextIndent());
    os << indent << "HandleTransformMatrix: " << this->HandleTransformMatrix << "\n";
    this->HandleTransformMatrix->PrintSelf(os,indent.GetNextIndent());
    os << indent << "HandlePicker: " << this->HandlePicker << "\n";
    this->HandlePicker->PrintSelf(os,indent.GetNextIndent());
    os << indent << "LastPickPosition: (" << this->LastPickPosition[0]
       << "," << this->LastPickPosition[1] << ")\n";
    os << indent << "LastEventPosition: (" << this->LastEventPosition[0]
       << "," << this->LastEventPosition[1] << ")\n";
    os << indent << "SmoothMotion: " << this->SmoothMotion << endl;
    // ConstraintAxis;
    // WaitingForMotion;
    // WaitCount;
  }
  
  