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

  Program:   Visualization Toolkit
  Module:    vtkTransformFilter.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

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   this list of conditions and the following disclaimer.

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 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
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=========================================================================*/
// .NAME vtkTransformFilter - transform points and associated normals and vectors
// .SECTION Description
// vtkTransformFilter is a filter to transform point coordinates, and 
// associated point normals and vectors. Other point data is passed
// through the filter.
//
// An alternative method of transformation is to use vtkActor's methods
// to scale, rotate, and translate objects. The difference between the
// two methods is that vtkActor's transformation simply effects where
// objects are rendered (via the graphics pipeline), whereas
// vtkTransformFilter actually modifies point coordinates in the 
// visualization pipeline. This is necessary for some objects 
// (e.g., vtkProbeFilter) that require point coordinates as input.

// .SECTION See Also
// vtkAbstractTransform vtkTransformPolyDataFilter vtkActor

#ifndef __vtkTransformFilter_h
#define __vtkTransformFilter_h

#include "vtkPointSetToPointSetFilter.h"
#include "vtkAbstractTransform.h"

class VTK_EXPORT vtkTransformFilter : public vtkPointSetToPointSetFilter
{
public:
  static vtkTransformFilter *New();
  vtkTypeMacro(vtkTransformFilter,vtkPointSetToPointSetFilter);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Return the MTime also considering the transform.
  unsigned long GetMTime();

  // Description:
  // Specify the transform object used to transform points.
  vtkSetObjectMacro(Transform,vtkAbstractTransform);
  vtkGetObjectMacro(Transform,vtkAbstractTransform);

protected:
  vtkTransformFilter();
  ~vtkTransformFilter();
  vtkTransformFilter(const vtkTransformFilter&) {};
  void operator=(const vtkTransformFilter&) {};

  void Execute();
  vtkAbstractTransform *Transform;
};

#endif


