libvtk6-dev 6.3.0+dfsg1-11build1 / usr / include / vtk-6.3 / vtkStructuredExtent.h

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

  Program:   Visualization Toolkit
  Module:    vtkStructuredExtent.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 vtkStructuredExtent - helper class to aid working with structured
//  extents.
//
// .SECTION Description
//  vtkStructuredExtent is an helper class that helps in arithmetic with
//  structured extents. It defines a bunch of static methods (most of which are
//  inlined) to aid in dealing with extents.

#ifndef vtkStructuredExtent_h
#define vtkStructuredExtent_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"

class VTKCOMMONDATAMODEL_EXPORT vtkStructuredExtent : public vtkObject
{
public:
  static vtkStructuredExtent* New();
  vtkTypeMacro(vtkStructuredExtent, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Clamps \c ext to fit in \c wholeExt.
  static void Clamp(int ext[6], const int wholeExt[]);

  // Description:
  // Returns true if \c ext is fits within \c wholeExt with atleast 1 dimension
  // smaller than the \c wholeExt.
  static bool StrictlySmaller(const int ext[6], const int wholeExt[6]);

  // Description:
  // Returns if \c ext fits within \c wholeExt. Unline StrictlySmaller, this
  // method returns true even if \c ext == \c wholeExt.
  static bool Smaller(const int ext[6], const int wholeExt[6]);

  // Description:
  // Grows the \c ext on each side by the given \c count.
  static void Grow(int ext[6], int count);

  // Description:
  // Makes \c ext relative to \c wholeExt.
  static void Transform(int ext[6], int wholeExt[6]);

  // Description:
  // Given the extents, computes the dimensions.
  static void GetDimensions(const int ext[6], int dims[3]);

//BTX
protected:
  vtkStructuredExtent();
  ~vtkStructuredExtent();

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

//----------------------------------------------------------------------------
inline void vtkStructuredExtent::Clamp(int ext[6], const int wholeExt[6])
{
  ext[0] = (ext[0] < wholeExt[0])? wholeExt[0] : ext[0];
  ext[1] = (ext[1] > wholeExt[1])? wholeExt[1] : ext[1];

  ext[2] = (ext[2] < wholeExt[2])? wholeExt[2] : ext[2];
  ext[3] = (ext[3] > wholeExt[3])? wholeExt[3] : ext[3];

  ext[4] = (ext[4] < wholeExt[4])? wholeExt[4] : ext[4];
  ext[5] = (ext[5] > wholeExt[5])? wholeExt[5] : ext[5];
}

//----------------------------------------------------------------------------
inline bool vtkStructuredExtent::Smaller(const int ext[6], const int wholeExt[6])
{
  if (ext[0]   < wholeExt[0] || ext[0]     > wholeExt[0 + 1] ||
    ext[0 + 1] < wholeExt[0] || ext[0 + 1] > wholeExt[0 + 1])
    {
    return false;
    }

  if (ext[2]   < wholeExt[2] || ext[2]     > wholeExt[2 + 1] ||
    ext[2 + 1] < wholeExt[2] || ext[2 + 1] > wholeExt[2 + 1])
    {
    return false;
    }

  if (ext[4]   < wholeExt[4] || ext[4]     > wholeExt[4 + 1] ||
    ext[4 + 1] < wholeExt[4] || ext[4 + 1] > wholeExt[4 + 1])
    {
    return false;
    }

  return true;
}

//----------------------------------------------------------------------------
inline bool vtkStructuredExtent::StrictlySmaller(const int ext[6], const int wholeExt[6])
{
  if (!vtkStructuredExtent::Smaller(ext, wholeExt))
    {
    return false;
    }

  if (ext[0] > wholeExt[0] || ext[1] < wholeExt[1] ||
    ext[2] > wholeExt[2] || ext[3] < wholeExt[3] ||
    ext[4] > wholeExt[4] || ext[5] < wholeExt[5])
    {
    return true;
    }

  return false;
}


//----------------------------------------------------------------------------
inline void vtkStructuredExtent::Grow(int ext[6], int count)
{
  ext[0] -= count;
  ext[2] -= count;
  ext[4] -= count;

  ext[1] += count;
  ext[3] += count;
  ext[5] += count;
}

//----------------------------------------------------------------------------
inline void vtkStructuredExtent::Transform(int ext[6], int wholeExt[6])
{
  ext[0] -= wholeExt[0];
  ext[1] -= wholeExt[0];

  ext[2] -= wholeExt[2];
  ext[3] -= wholeExt[2];

  ext[4] -= wholeExt[4];
  ext[5] -= wholeExt[4];
}

//----------------------------------------------------------------------------
inline void vtkStructuredExtent::GetDimensions(const int ext[6], int dims[3])
{
  dims[0] = ext[1]-ext[0] + 1;
  dims[1] = ext[3]-ext[2] + 1;
  dims[2] = ext[5]-ext[4] + 1;
}

#endif

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