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// -*- c++ -*-
/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkGradientFilter.h,v $
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 (c) Sandia Corporation
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
----------------------------------------------------------------------------*/
// .NAME vtkGradientFilter - A general filter for gradient estimation.
//
// .SECTION Description
// Estimates the gradient of a scalar field in a data set. This class
// is basically designed for unstructured data sets (i.e.
// vtkUnstructuredGrid). More efficient filters exist for vtkImageData.
//
#ifndef __vtkGradientFilter_h
#define __vtkGradientFilter_h
#include "vtkDataSetAlgorithm.h"
class VTK_GRAPHICS_EXPORT vtkGradientFilter : public vtkDataSetAlgorithm
{
public:
vtkTypeRevisionMacro(vtkGradientFilter, vtkDataSetAlgorithm);
virtual void PrintSelf(ostream &os, vtkIndent indent);
static vtkGradientFilter *New();
// Description:
// These are basically a convenience method that calls SetInputArrayToProcess
// to set the array used as the input scalars. The fieldAssociation comes
// from the vtkDataObject::FieldAssocations enum. The fieldAttributeType
// comes from the vtkDataSetAttributes::AttributeTypes enum.
virtual void SetInputScalars(int fieldAssociation, const char *name);
virtual void SetInputScalars(int fieldAssociation, int fieldAttributeType);
// Description:
// Get/Set the name of the resulting array to create. If NULL (the
// default) then the output array will be named "Gradients".
vtkGetStringMacro(ResultArrayName);
vtkSetStringMacro(ResultArrayName);
protected:
vtkGradientFilter();
~vtkGradientFilter();
virtual int RequestUpdateExtent(vtkInformation *,
vtkInformationVector **,
vtkInformationVector *);
virtual int RequestData(vtkInformation *, vtkInformationVector **,
vtkInformationVector *);
char *ResultArrayName;
private:
vtkGradientFilter(const vtkGradientFilter &); // Not implemented
void operator=(const vtkGradientFilter &); // Not implemented
};
#endif //_vtkGradientFilter_h
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