paraview-dev 5.0.1+dfsg1-4 / usr / include / paraview / vtkImageInterpolator.h

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

  Program:   Visualization Toolkit
  Module:    vtkImageInterpolator.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 vtkImageInterpolator - interpolate data values from images
// .SECTION Description
// vtkImageInterpolator provides a simple interface for interpolating image
// data.  It provides linear, cubic, and nearest-neighbor interpolation.
// .SECTION Thanks
// Thanks to David Gobbi at the Seaman Family MR Centre and Dept. of Clinical
// Neurosciences, Foothills Medical Centre, Calgary, for providing this class.
// .SECTION See also
// vtkImageReslice


#ifndef vtkImageInterpolator_h
#define vtkImageInterpolator_h

#include "vtkImagingCoreModule.h" // For export macro
#include "vtkAbstractImageInterpolator.h"

class VTKIMAGINGCORE_EXPORT vtkImageInterpolator :
  public vtkAbstractImageInterpolator
{
public:
  static vtkImageInterpolator *New();
  vtkTypeMacro(vtkImageInterpolator, vtkAbstractImageInterpolator);
  virtual void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // The interpolation mode for point scalars (default: linear).  Subclasses
  // will provide additional interpolation modes, so this is a virtual method.
  virtual void SetInterpolationMode(int mode);
  void SetInterpolationModeToNearest() {
    this->SetInterpolationMode(VTK_NEAREST_INTERPOLATION); }
  void SetInterpolationModeToLinear() {
    this->SetInterpolationMode(VTK_LINEAR_INTERPOLATION); }
  void SetInterpolationModeToCubic() {
    this->SetInterpolationMode(VTK_CUBIC_INTERPOLATION); }
  int GetInterpolationMode() { return this->InterpolationMode; }
  virtual const char *GetInterpolationModeAsString();

  // Description:
  // Get the support size for use in computing update extents.  If the data
  // will be sampled on a regular grid, then pass a matrix describing the
  // structured coordinate transformation between the output and the input.
  // Otherwise, pass NULL as the matrix to retrieve the full kernel size.
  virtual void ComputeSupportSize(const double matrix[16], int support[3]);

  // Description:
  // Returns true if the interpolator supports weight precomputation.
  // This will always return true for this interpolator.
  virtual bool IsSeparable();

  // Description:
  // If the data is going to be sampled on a regular grid, then the
  // interpolation weights can be precomputed.  A matrix must be supplied
  // that provides a transformation between the provided extent and the
  // structured coordinates of the input.  This matrix must perform only
  // permutations, scales, and translation, i.e. each of the three columns
  // must have only one non-zero value.  A new extent is provided that can
  // be used for out-of-bounds checks. THIS METHOD IS THREAD SAFE.
  virtual void PrecomputeWeightsForExtent(
    const double matrix[16], const int extent[6], int newExtent[6],
    vtkInterpolationWeights *&weights);
  virtual void PrecomputeWeightsForExtent(
    const float matrix[16], const int extent[6], int newExtent[6],
    vtkInterpolationWeights *&weights);

  // Description:
  // Free the precomputed weights.  THIS METHOD IS THREAD SAFE.
  virtual void FreePrecomputedWeights(vtkInterpolationWeights *&weights);

protected:
  vtkImageInterpolator();
  ~vtkImageInterpolator();

  // Description:
  // Update the interpolator.
  virtual void InternalUpdate();

  // Description:
  // Copy all members.
  virtual void InternalDeepCopy(vtkAbstractImageInterpolator *obj);

  // Description:
  // Get the interpolation functions.
  virtual void GetInterpolationFunc(
    void (**doublefunc)(
      vtkInterpolationInfo *, const double [3], double *));
  virtual void GetInterpolationFunc(
    void (**floatfunc)(
      vtkInterpolationInfo *, const float [3], float *));

  // Description:
  // Get the row interpolation functions.
  virtual void GetRowInterpolationFunc(
    void (**doublefunc)(
      vtkInterpolationWeights *, int, int, int, double *, int));
  virtual void GetRowInterpolationFunc(
    void (**floatfunc)(
      vtkInterpolationWeights *, int, int, int, float *, int));

  int InterpolationMode;

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

#endif

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