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

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


Copyright (c) 1993-2000 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

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modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * 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
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
// .NAME vtkWarpVector - deform geometry with vector data
// .SECTION Description
// vtkWarpVector is a filter that modifies point coordinates by moving
// points along vector times the scale factor. Useful for showing flow
// profiles or mechanical deformation.
//
// The filter passes both its point data and cell data to its output.

#ifndef __vtkWarpVector_h
#define __vtkWarpVector_h

#include "vtkPointSetToPointSetFilter.h"
#include "vtkMultiThreader.h"

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

  // Description:
  // Specify value to scale displacement.
  vtkSetMacro(ScaleFactor,float);
  vtkGetMacro(ScaleFactor,float);

  // Description:
  // Get/Set the number of threads to create when rendering
  vtkSetClampMacro( NumberOfThreads, int, 1, VTK_MAX_THREADS );
  vtkGetMacro( NumberOfThreads, int );

  // Description:
  // public so that C function can call it.
  void ThreadedExecute(int threadId, int numThreads);

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

  void Execute();
  int SplitPointRange(int threadId, int threadCount, int &min, int &max);
  float ScaleFactor;

  vtkMultiThreader *Threader;
  int NumberOfThreads;
};

#endif


