d2arrow.h

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#ifndef D2ARROW_H
#define D2ARROW_H

#include <print.h>
#include <point.h>
#include <gobj.h>


class d2arrow : public gobj
{
public:

  point2<double> pi[4];

  static double headlengthfactor;


  d2arrow( doublec arrowlength, doublec headlength );

  d2arrow
  (
    point2<double> const & pi0,
    doublec theta, 
    doublec arrowlength, 
    doublec headlength
  );

  d2arrow
  (
    point2<double> const & q0,
    point2<double> const & q1,
    doublec arrowlength, 
    doublec headlength
  );

  void draw();

  void rotate(doublec theta);

  void translate( point2<double> const & x );

  void constructOnXaxis( doublec arrowlength, doublec headlength );
};


#endif