CentipedeEndpointsPolar.h

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/******************************************************************************************************
 * (C) 2020 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#ifndef CENTIPEDE_ENDPOINTS_POLAR_H
#define CENTIPEDE_ENDPOINTS_POLAR_H
 
#include "CentipedeEndpointsAbstract.h"
#include "CentipedeIntersectionType.h"
#include "DocumentModelCoords.h"
#include "DocumentModelGuideline.h"
#include <QPointF>
#include "Transformation.h"
 
class CentipedeDebugPolar;

class CentipedeEndpointsPolar : public CentipedeEndpointsAbstract
{
public:
  CentipedeEndpointsPolar(const DocumentModelCoords &modelCoords,
                          const DocumentModelGuideline &modelGuideline,
                          const Transformation &transformation,
                          const QPointF &posClickScreen,
                          const QPointF &posOriginScreen);
  virtual ~CentipedeEndpointsPolar ();

  void ellipseScreenConstantRForTHighLowAngles (const Transformation &transformation,
                                                const QPointF &posClickScreen,
                                                double &angleRotation,
                                                QRectF &rectBounding,
                                                CentipedeDebugPolar &DebugPolar);
 

  QPointF posScreenConstantRForHighT (double radius) const;

  QPointF posScreenConstantRForLowT (double radius) const;

  void posScreenConstantRHighLow (double radiusAboutClick,
                                  QPointF &posLow,
                                  QPointF &posHigh) const;

  void posScreenConstantTForRHighLow (double radius,
                                            QPointF &posLow,
                                            QPointF &posHigh) const;
  
private:
  CentipedeEndpointsPolar();
 
  double closestAngleToCentralAngle (double angleCenter,
                                     double angleOld) const;

  void generatePreviousAndNextPointsConstantR (double radius,
                                               int iPrevious,
                                               int iNext,
                                               QPointF &posGraphPrevious,
                                               QPointF &posGraphNext,
                                               QPointF &posScreen) const;

  QPointF posScreenConstantRCommon (double radius,
                                    CentipedeIntersectionType intersectionType) const;
 
  double rAtOrigin () const;
  double tAtOrigin () const;
 
  DocumentModelCoords m_modelCoords;
  QPointF m_posOriginScreen;
};
 
#endif // CENTIPEDE_ENDPOINTS_POLAR_H