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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54  | /*=========================================================================
  Program:   Visualization Toolkit
  Module:    vtkNonLinearCell.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 vtkNonLinearCell - abstract superclass for non-linear cells
// .SECTION Description
// vtkNonLinearCell is an abstract superclass for non-linear cell types.
// Cells that are a direct subclass of vtkCell or vtkCell3D are linear;
// cells that are a subclass of vtkNonLinearCell have non-linear interpolation
// functions. Non-linear cells require special treatment when tessellating
// or converting to graphics primitives. Note that the linearity of the cell
// is a function of whether the cell needs tessellation, which does not
// strictly correlate with interpolation order (e.g., vtkHexahedron has
// non-linear interpolation functions (a product of three linear functions
// in r-s-t) even thought vtkHexahedron is considered linear.)
#ifndef vtkNonLinearCell_h
#define vtkNonLinearCell_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkCell.h"
class VTKCOMMONDATAMODEL_EXPORT vtkNonLinearCell : public vtkCell
{
public:
  vtkTypeMacro(vtkNonLinearCell,vtkCell);
  void PrintSelf(ostream& os, vtkIndent indent);
  // Description:
  // Non-linear cells require special treatment (tessellation) when
  // converting to graphics primitives (during mapping). The vtkCell
  // API IsLinear() is modified to indicate this requirement.
  virtual int IsLinear() {return 0;}
protected:
  vtkNonLinearCell();
  ~vtkNonLinearCell() {}
private:
  vtkNonLinearCell(const vtkNonLinearCell&);  // Not implemented.
  void operator=(const vtkNonLinearCell&);  // Not implemented.
};
#endif
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