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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkProbeFilter.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.
=========================================================================*/
// .NAME vtkProbeFilter - sample data values at specified point locations
// .SECTION Description
// vtkProbeFilter is a filter that computes point attributes (e.g., scalars,
// vectors, etc.) at specified point positions. The filter has two inputs:
// the Input and Source. The Input geometric structure is passed through the
// filter. The point attributes are computed at the Input point positions
// by interpolating into the source data. For example, we can compute data
// values on a plane (plane specified as Input) from a volume (Source).
//
// This filter can be used to resample data, or convert one dataset form into
// another. For example, an unstructured grid (vtkUnstructuredGrid) can be
// probed with a volume (three-dimensional vtkImageData), and then volume
// rendering techniques can be used to visualize the results. Another example:
// a line or curve can be used to probe data to produce x-y plots along
// that line or curve.
#ifndef __vtkProbeFilter_h
#define __vtkProbeFilter_h
#include "vtkDataSetAlgorithm.h"
class vtkIdTypeArray;
class VTK_GRAPHICS_EXPORT vtkProbeFilter : public vtkDataSetAlgorithm
{
public:
static vtkProbeFilter *New();
vtkTypeRevisionMacro(vtkProbeFilter,vtkDataSetAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Specify the point locations used to probe input. Any geometry
// can be used. Old style. Do not use unless for backwards compatibility.
void SetSource(vtkDataObject *source);
vtkDataObject *GetSource();
// Description:
// Specify the point locations used to probe input. Any geometry
// can be used. New style. Equivalent to SetInputConnection(1, algOutput).
void SetSourceConnection(vtkAlgorithmOutput* algOutput);
// Description:
// This flag is used only when a piece is requested to update. By default
// the flag is off. Because no spatial correspondence between input pieces
// and source pieces is known, all of the source has to be requested no
// matter what piece of the output is requested. When there is a spatial
// correspondence, the user/application can set this flag. This hint allows
// the breakup of the probe operation to be much more efficient. When piece
// m of n is requested for update by the user, then only n of m needs to
// be requested of the source.
vtkSetMacro(SpatialMatch, int);
vtkGetMacro(SpatialMatch, int);
vtkBooleanMacro(SpatialMatch, int);
// Description:
// Get the list of point ids in the output that contain attribute data
// interpolated from the source.
vtkGetObjectMacro(ValidPoints, vtkIdTypeArray);
protected:
vtkProbeFilter();
~vtkProbeFilter();
int SpatialMatch;
virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
virtual int RequestInformation(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
virtual int RequestUpdateExtent(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
void Probe(vtkDataSet *input, vtkDataSet *source, vtkDataSet *output);
vtkIdTypeArray *ValidPoints;
private:
vtkProbeFilter(const vtkProbeFilter&); // Not implemented.
void operator=(const vtkProbeFilter&); // Not implemented.
};
#endif
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