vtkVectorNorm.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkVectorNorm.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.

=========================================================================*/
#ifndef vtkVectorNorm_h
#define vtkVectorNorm_h

#define VTK_ATTRIBUTE_MODE_DEFAULT 0
#define VTK_ATTRIBUTE_MODE_USE_POINT_DATA 1
#define VTK_ATTRIBUTE_MODE_USE_CELL_DATA 2

#include "vtkFiltersCoreModule.h" // For export macro
#include "vtkDataSetAlgorithm.h"

class vtkDataArray;
class vtkFloatArray;

class VTKFILTERSCORE_EXPORT vtkVectorNorm : public vtkDataSetAlgorithm
{
public:
  vtkTypeMacro(vtkVectorNorm,vtkDataSetAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  static vtkVectorNorm *New();


  // Specify whether to normalize scalar values. If the data is normalized,
  // then it will fall in the range [0,1].
  vtkSetMacro(Normalize,int);
  vtkGetMacro(Normalize,int);
  vtkBooleanMacro(Normalize,int);


  vtkSetMacro(AttributeMode,int);
  vtkGetMacro(AttributeMode,int);
  void SetAttributeModeToDefault()
    {this->SetAttributeMode(VTK_ATTRIBUTE_MODE_DEFAULT);};
  void SetAttributeModeToUsePointData()
    {this->SetAttributeMode(VTK_ATTRIBUTE_MODE_USE_POINT_DATA);};
  void SetAttributeModeToUseCellData()
    {this->SetAttributeMode(VTK_ATTRIBUTE_MODE_USE_CELL_DATA);};
  const char *GetAttributeModeAsString();

protected:
  vtkVectorNorm();
  ~vtkVectorNorm() {}

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);

  int Normalize;  // normalize 0<=n<=1 if true.
  int AttributeMode; //control whether to use point or cell data, or both

private:
  vtkVectorNorm(const vtkVectorNorm&);  // Not implemented.
  void operator=(const vtkVectorNorm&);  // Not implemented.

  // Helper function
  void GenerateScalars(vtkIdType num, vtkDataArray *v, vtkFloatArray *s);
};

#endif