vtkImplicitSum.h

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

  Program:   Visualization Toolkit
  Module:    vtkImplicitSum.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 __vtkImplicitSum_h
#define __vtkImplicitSum_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkImplicitFunction.h"

class vtkDoubleArray;
class vtkImplicitFunctionCollection;

class VTKCOMMONDATAMODEL_EXPORT vtkImplicitSum : public vtkImplicitFunction
{
public:
  static vtkImplicitSum *New();

  vtkTypeMacro(vtkImplicitSum,vtkImplicitFunction);
  void PrintSelf(ostream& os, vtkIndent indent);


  double EvaluateFunction(double x[3]);
  double EvaluateFunction(double x, double y, double z)
    {return this->vtkImplicitFunction::EvaluateFunction(x, y, z); } ;

  void EvaluateGradient(double x[3], double g[3]);

  unsigned long GetMTime();

  void AddFunction(vtkImplicitFunction *in, double weight);

  void AddFunction(vtkImplicitFunction *in) { this->AddFunction(in, 1.0); }

  void RemoveAllFunctions();

  void SetFunctionWeight(vtkImplicitFunction *f, double weight);


  vtkSetMacro(NormalizeByWeight, int);
  vtkGetMacro(NormalizeByWeight, int);
  vtkBooleanMacro(NormalizeByWeight, int);

protected:
  vtkImplicitSum();
  ~vtkImplicitSum();

  vtkImplicitFunctionCollection *FunctionList;
  vtkDoubleArray *Weights;
  double TotalWeight;

  void CalculateTotalWeight(void);
  int NormalizeByWeight;

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

#endif