libvtk5-dev 5.10.1+dfsg-2.1build1 / usr / include / vtk-5.10 / vtkTemporalShiftScale.h

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

  Program:   Visualization Toolkit
  Module:    vtkTemporalShiftScale.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.

=========================================================================*/
// .NAME vtkTemporalShiftScale - modify the time range/steps of temporal data
// .SECTION Description
// vtkTemporalShiftScale  modify the time range or time steps of
// the data without changing the data itself. The data is not resampled
// by this filter, only the information accompanying the data is modified.

// .SECTION Thanks
// Ken Martin (Kitware) and John Bidiscombe of 
// CSCS - Swiss National Supercomputing Centre
// for creating and contributing this class.
// For related material, please refer to : 
// John Biddiscombe, Berk Geveci, Ken Martin, Kenneth Moreland, David Thompson,
// "Time Dependent Processing in a Parallel Pipeline Architecture", 
// IEEE Visualization 2007. 

#ifndef __vtkTemporalShiftScale_h
#define __vtkTemporalShiftScale_h

#include "vtkTemporalDataSetAlgorithm.h"

class VTK_HYBRID_EXPORT vtkTemporalShiftScale : public vtkTemporalDataSetAlgorithm
{
public:
  static vtkTemporalShiftScale *New();
  vtkTypeMacro(vtkTemporalShiftScale, vtkTemporalDataSetAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Apply a translation to the data before scaling.
  // To convert T{5,100} to T{0,1} use Preshift=-5, Scale=1/95, PostShift=0
  // To convert T{5,105} to T{5,10} use Preshift=-5, Scale=5/100, PostShift=5
  vtkSetMacro(PreShift, double);
  vtkGetMacro(PreShift, double);

  // Description:
  // Apply a translation to the time
  vtkSetMacro(PostShift, double);
  vtkGetMacro(PostShift, double);

  // Description:
  // Apply a scale to the time.
  vtkSetMacro(Scale, double);
  vtkGetMacro(Scale, double);

  // Description:
  // If Periodic is true, requests for time will be wrapped around so that 
  // the source appears to be a periodic time source. If data exists for times
  // {0,N-1}, setting periodic to true will cause time 0 to be produced when time
  // N, 2N, 2N etc is requested. This effectively gives the source the ability to
  // generate time data indefinitely in a loop.
  // When combined with Shift/Scale, the time becomes periodic in the 
  // shifted and scaled time frame of reference.
  // Note: Since the input time may not start at zero, the wrapping of time
  // from the end of one period to the start of the next, will subtract the
  // initial time - a source with T{5..6} repeated periodicaly will have output
  // time {5..6..7..8} etc. 
  vtkSetMacro(Periodic, int);
  vtkGetMacro(Periodic, int);
  vtkBooleanMacro(Periodic, int);

  // Description:
  // if Periodic time is enabled, this flag determines if the last time step is the same
  // as the first. If PeriodicEndCorrection is true, then it is assumed that the input
  // data goes from 0-1 (or whatever scaled/shifted actual time) and time 1 is the
  // same as time 0 so that steps will be 0,1,2,3...N,1,2,3...N,1,2,3 where step N
  // is the same as 0 and step 0 is not repeated. When this flag is false
  // the data is assumed to be literal and output is of the form 0,1,2,3...N,0,1,2,3...
  // By default this flag is ON
  vtkSetMacro(PeriodicEndCorrection, int);
  vtkGetMacro(PeriodicEndCorrection, int);
  vtkBooleanMacro(PeriodicEndCorrection, int);

  // Description:
  // if Periodic time is enabled, this controls how many time periods time is reported 
  // for. A filter cannot output an infinite number of time steps and therefore a finite
  // number of periods is generated when reporting time.
  vtkSetMacro(MaximumNumberOfPeriods, double);
  vtkGetMacro(MaximumNumberOfPeriods, double);

protected:
  vtkTemporalShiftScale();
  ~vtkTemporalShiftScale();

  double PreShift;
  double PostShift;
  double Scale;
  int    Periodic;
  int    PeriodicEndCorrection;
  double MaximumNumberOfPeriods;
  //
  double InRange[2];
  double OutRange[2];
  double PeriodicRange[2];
  int    PeriodicN;
  double TempMultiplier;
  
  virtual int RequestUpdateExtent (vtkInformation *,
                                   vtkInformationVector **,
                                   vtkInformationVector *);
  virtual int RequestInformation (vtkInformation *,
                                  vtkInformationVector **,
                                  vtkInformationVector *);
  
  virtual int RequestData(vtkInformation *,
                          vtkInformationVector **,
                          vtkInformationVector *);

  double ForwardConvert(double T0);
  double BackwardConvert(double T1);

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



#endif

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