vtkBezierContourLineInterpolator.h

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

  Program:   Visualization Toolkit
  Module:    vtkBezierContourLineInterpolator.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.

=========================================================================*/
#ifndef vtkBezierContourLineInterpolator_h
#define vtkBezierContourLineInterpolator_h

#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkContourLineInterpolator.h"

class VTKINTERACTIONWIDGETS_EXPORT vtkBezierContourLineInterpolator
                          : public vtkContourLineInterpolator
{
public:

  static vtkBezierContourLineInterpolator *New();


  vtkTypeMacro(vtkBezierContourLineInterpolator, vtkContourLineInterpolator);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  int InterpolateLine( vtkRenderer *ren,
                               vtkContourRepresentation *rep,
                               int idx1, int idx2 ) override;


  vtkSetClampMacro(MaximumCurveError, double, 0.0, VTK_DOUBLE_MAX);
  vtkGetMacro(MaximumCurveError, double);


  vtkSetClampMacro(MaximumCurveLineSegments, int, 1, 1000);
  vtkGetMacro(MaximumCurveLineSegments, int);

  void GetSpan(int nodeIndex, vtkIntArray *nodeIndices,
                        vtkContourRepresentation *rep) override;

protected:
  vtkBezierContourLineInterpolator();
  ~vtkBezierContourLineInterpolator() override;

  void ComputeMidpoint(double p1[3], double p2[3], double mid[3])
  {
      mid[0] = (p1[0] + p2[0])/2;
      mid[1] = (p1[1] + p2[1])/2;
      mid[2] = (p1[2] + p2[2])/2;
  }

  double MaximumCurveError;
  int    MaximumCurveLineSegments;

private:
  vtkBezierContourLineInterpolator(const vtkBezierContourLineInterpolator&) = delete;
  void operator=(const vtkBezierContourLineInterpolator&) = delete;
};

#endif