vtkNonLinearCell.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkNonLinearCell.h,v $

  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.

=========================================================================*/
#ifndef __vtkNonLinearCell_h
#define __vtkNonLinearCell_h

#include "vtkCell.h"

#include "vtkPointLocator.h" // Needed for inline method
#include "vtkPoints.h" // Needed for inline method

class vtkPolyData;
class vtkDataSet;
class vtkUnstructuredGrid;

class VTK_FILTERING_EXPORT vtkNonLinearCell : public vtkCell
{
public:
  vtkTypeRevisionMacro(vtkNonLinearCell,vtkCell);  
  void PrintSelf(ostream& os, vtkIndent indent);


  vtkSetClampMacro(Error,double,0.001,1.0);
  vtkGetMacro(Error,double);

  virtual int IsLinear() {return 0;}
  

  virtual void Tessellate(vtkIdType cellId, 
                          vtkDataSet *input, vtkPolyData *output, 
                          vtkPointLocator *locator=NULL);
  

  virtual void Tessellate(vtkIdType cellId, 
                          vtkDataSet *input, vtkUnstructuredGrid *output, 
                          vtkPointLocator *locator=NULL);
  

protected:
  vtkNonLinearCell();
  ~vtkNonLinearCell() {}

  double Error;

  // inline helper for tessellation- used by subclasses
  vtkIdType InsertPoint(vtkPointLocator *locator, vtkPoints *pts, double *x)
    {
      if ( locator != NULL ) 
        {
        vtkIdType p;
        locator->InsertUniquePoint(x,p);
        return p;
        }
      else
        {
        return pts->InsertNextPoint(x);
        }
    }
  
private:
  vtkNonLinearCell(const vtkNonLinearCell&);  // Not implemented.
  void operator=(const vtkNonLinearCell&);  // Not implemented.
};

#endif

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