vtkImageWeightedSum.h

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

  Program:   Visualization Toolkit
  Module:    vtkImageWeightedSum.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 vtkImageWeightedSum_h
#define vtkImageWeightedSum_h

#include "vtkImagingMathModule.h" // For export macro
#include "vtkThreadedImageAlgorithm.h"

class vtkDoubleArray;
class VTKIMAGINGMATH_EXPORT vtkImageWeightedSum : public vtkThreadedImageAlgorithm
{
public:
  static vtkImageWeightedSum *New();
  vtkTypeMacro(vtkImageWeightedSum,vtkThreadedImageAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);


  virtual void SetWeights(vtkDoubleArray*);
  vtkGetObjectMacro(Weights, vtkDoubleArray);

  virtual void SetWeight(vtkIdType id, double weight);


  vtkGetMacro(NormalizeByWeight, int);
  vtkSetClampMacro(NormalizeByWeight, int, 0, 1);
  vtkBooleanMacro(NormalizeByWeight, int);

  double CalculateTotalWeight();

protected:
  vtkImageWeightedSum();
  ~vtkImageWeightedSum();

  // Array to hold all the weights
  vtkDoubleArray *Weights;

  // Boolean flag to divide by sum or not
  int NormalizeByWeight;

  int RequestInformation (vtkInformation * vtkNotUsed(request),
    vtkInformationVector** vtkNotUsed( inputVector ),
    vtkInformationVector *outputVector);

  void ThreadedRequestData (vtkInformation* request,
                            vtkInformationVector** inputVector,
                            vtkInformationVector* outputVector,
                            vtkImageData ***inData, vtkImageData **outData,
                            int ext[6], int id);
  int FillInputPortInformation(int i, vtkInformation* info);

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

#endif