vtkLabelPlacer.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkLabelPlacer.h
 
  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.
 
=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
#ifndef vtkLabelPlacer_h
#define vtkLabelPlacer_h
 
#include "vtkPolyDataAlgorithm.h"
#include "vtkRenderingLabelModule.h" // For export macro
 
class vtkRenderer;
class vtkCoordinate;
class vtkSelectVisiblePoints;
 
class VTKRENDERINGLABEL_EXPORT vtkLabelPlacer : public vtkPolyDataAlgorithm
{
public:
  static vtkLabelPlacer* New();
  vtkTypeMacro(vtkLabelPlacer, vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  vtkGetObjectMacro(Renderer, vtkRenderer);
  virtual void SetRenderer(vtkRenderer*);
 
  vtkGetObjectMacro(AnchorTransform, vtkCoordinate);
 
  enum LabelGravity
  {
    VerticalBottomBit = 1,
    VerticalBaselineBit = 2,
    VerticalCenterBit = 4,
    VerticalTopBit = 8,
    HorizontalLeftBit = 16,
    HorizontalCenterBit = 32,
    HorizontalRightBit = 64,
    VerticalBitMask = 15,
    HorizontalBitMask = 112,
 
    LowerLeft = 17, 
    LowerCenter =
      33, 
    LowerRight = 65, 
 
    BaselineLeft = 18,   
    BaselineCenter = 34, 
    BaselineRight = 66,  
 
    CenterLeft = 20, 
    CenterCenter =
      36, 
    CenterRight = 68, 
 
    UpperLeft = 24,   
    UpperCenter = 40, 
    UpperRight = 72   
  };
 
  enum OutputCoordinates
  {
    WORLD = 0,  
    DISPLAY = 1 
  };
 
 
  virtual void SetGravity(int gravity);
  vtkGetMacro(Gravity, int);
 
 
  vtkSetClampMacro(MaximumLabelFraction, double, 0., 1.);
  vtkGetMacro(MaximumLabelFraction, double);
 
 
  vtkSetMacro(IteratorType, int);
  vtkGetMacro(IteratorType, int);
 
 
  vtkSetMacro(UseUnicodeStrings, bool);
  vtkGetMacro(UseUnicodeStrings, bool);
  vtkBooleanMacro(UseUnicodeStrings, bool);
 
  vtkMTimeType GetMTime() override;
 
 
  vtkGetMacro(PositionsAsNormals, bool);
  vtkSetMacro(PositionsAsNormals, bool);
  vtkBooleanMacro(PositionsAsNormals, bool);
 
 
  vtkGetMacro(GeneratePerturbedLabelSpokes, bool);
  vtkSetMacro(GeneratePerturbedLabelSpokes, bool);
  vtkBooleanMacro(GeneratePerturbedLabelSpokes, bool);
 
 
  vtkGetMacro(UseDepthBuffer, bool);
  vtkSetMacro(UseDepthBuffer, bool);
  vtkBooleanMacro(UseDepthBuffer, bool);
 
 
  vtkGetMacro(OutputTraversedBounds, bool);
  vtkSetMacro(OutputTraversedBounds, bool);
  vtkBooleanMacro(OutputTraversedBounds, bool);
 
 
  vtkGetMacro(OutputCoordinateSystem, int);
  vtkSetClampMacro(OutputCoordinateSystem, int, WORLD, DISPLAY);
  void OutputCoordinateSystemWorld() { this->SetOutputCoordinateSystem(vtkLabelPlacer::WORLD); }
  void OutputCoordinateSystemDisplay() { this->SetOutputCoordinateSystem(vtkLabelPlacer::DISPLAY); }
 
protected:
  vtkLabelPlacer();
  ~vtkLabelPlacer() override;
 
  virtual void SetAnchorTransform(vtkCoordinate*);
 
  int FillInputPortInformation(int port, vtkInformation* info) override;
  int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  class Internal;
  Internal* Buckets;
 
  vtkRenderer* Renderer;
  vtkCoordinate* AnchorTransform;
  vtkSelectVisiblePoints* VisiblePoints;
  int Gravity;
  double MaximumLabelFraction;
  bool PositionsAsNormals;
  bool OutputTraversedBounds;
  bool GeneratePerturbedLabelSpokes;
  bool UseDepthBuffer;
  bool UseUnicodeStrings;
 
  int LastRendererSize[2];
  double LastCameraPosition[3];
  double LastCameraFocalPoint[3];
  double LastCameraViewUp[3];
  double LastCameraParallelScale;
  int IteratorType;
  int OutputCoordinateSystem;
 
private:
  vtkLabelPlacer(const vtkLabelPlacer&) = delete;
  void operator=(const vtkLabelPlacer&) = delete;
};
 
#endif // vtkLabelPlacer_h