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/*=========================================================================
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.
=========================================================================*/
/**
* @class vtkNonLinearCell
* @brief abstract superclass for non-linear cells
*
* 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 "vtkCell.h"
#include "vtkCommonDataModelModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class VTKCOMMONDATAMODEL_EXPORT vtkNonLinearCell : public vtkCell
{
public:
vtkTypeMacro(vtkNonLinearCell, vtkCell);
void PrintSelf(ostream& os, vtkIndent indent) override;
/**
* Non-linear cells require special treatment (tessellation) when
* converting to graphics primitives (during mapping). The vtkCell
* API IsLinear() is modified to indicate this requirement.
*/
int IsLinear() override { return 0; }
protected:
vtkNonLinearCell();
~vtkNonLinearCell() override = default;
private:
vtkNonLinearCell(const vtkNonLinearCell&) = delete;
void operator=(const vtkNonLinearCell&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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