RoughVisitor.h

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/* -*- mode: c++ -*- */
#ifndef BOARD_ROUGH_VISITOR_H
#define BOARD_ROUGH_VISITOR_H
 
/*
 *
 * matplotlib.pyplot.xkcd
 *
 * https://shihn.ca/posts/2020/roughjs-algorithms/
 *
 * https://openaccess.city.ac.uk/id/eprint/1274/
 */
 
#include <cstddef> // For std::size_t
#include <board/Point.h>
#include <board/ShapeVisitor.h>
#include <board/Types.h>
 
namespace LibBoard
{
 
struct RoughVisitor : public CompositeShapeTransform {
  RoughVisitor();
  void setRepeat(int n);
  void setFilling(SketchFilling filling);
  void setHachureAngle(double angle);
  void setHachureSpacing(double spacing);
  void setAutomaticHachureSpacing(bool);
  virtual Shape * map(const Shape & shape) override;
  virtual Shape * map(const Shape & shape) const override;
  virtual Shape * map(const Line &) override;
  virtual Shape * map(const Line &) const override;
  virtual Shape * map(const Arrow &) override;
  virtual Shape * map(const Arrow &) const override;
  virtual Shape * map(const Polyline &) override;
  virtual Shape * map(const Polyline &) const override;
  virtual Shape * map(const Ellipse &) override;
  virtual Shape * map(const Ellipse &) const override;
  virtual Shape * map(const Bezier &) override;
  virtual Shape * map(const Bezier &) const override;
 
  virtual ~RoughVisitor() override;
 
  static void slideRandomly(Point & point, const double & radius);
 
  static Point randomlySlided(const Point & point, const double & radius);
 
  static void slideRandomlyAwayFromSegment(Point & p, const Point & a, const Point & b, const double magnitude);
 
  static Point randomlySlidedAwayFromSegment(const Point & p, const Point & a, const Point & b, const double magnitude);
 
  static void slideRandomlyAwayFromSegment(Point & p, const Point & a, const Point & b);
 
  static Point randomlySlidedAwayFromSegment(const Point & p, const Point & a, const Point & b);
 
  static void slideRandomlyAwayFromSegmentInBox(Point & p, const Point & u, double uMagnitude, const Point & v, double vMagnitude);
 
  static Point randomlySlidedAwayFromSegmentInBox(const Point & p, const Point & u, double uMagnitude, const Point & v, double vMagnitude);
 
private:
  int _repeat;
  SketchFilling _filling;
  double _hachureAngle;
  double _hachureSpacing;
  bool _automaticHachureSpacing;
};
 
} // namespace LibBoard
 
#endif /* BOARD_ROUGH_VISITOR_H */