edgel.h

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//
// edgel stuff
// stumeikle Sun May 12 20:30:02 2002
//
//

#ifndef EDGEL_H
#define EDGEL_H

#include <boost/numeric/ublas/vector.hpp>
#include <boost/shared_ptr.hpp>
#include "angle.h"
#include "prop.h"
#include "image_draw.h"

namespace mimas {
  
class edgel : public prop   
{
    private:
   typedef boost::numeric::ublas::vector< double > Vector;
   Vector centre;   
   double strength; 
   angle orientation; 

    public:
  edgel(void) : prop( edgel_t ), centre( 2 ) {}

  //inspectors and modifiers
  void  setPosition( double x, double y) { centre(0) = x; centre(1) = y; }
  void  setStrength( double s )   { strength = s; }
  void  setContrast( double s )   { strength = s; }
  void  setOrientation( angle a )    { orientation = a; }

  const Vector &getPosition() const { return centre; }
  angle getOrientation()  { return orientation; }
  double    getStrength()   { return strength; }
  double    getContrast()   { return strength; }

  virtual void draw( image< rgba< unsigned char > >& output,
                      int i, int j, bool c )
  {
      double e1x,e1y,e2x,e2y;
      angle a = orientation;

      //should really check to see if the orientation was set
      //you could draw the orientation of the edgel by increasing
      //the '1's below to a higher value.
      e1x = centre(0) + cos(a)*1;
      e1y = centre(1) + sin(a)*1;
      a+=M_PI;

      e2x = centre(0) + cos(a)*1;
      e2y = centre(1) + sin(a)*1;
      drawLine(output, (int) e1x, (int) e1y, (int) e2x, (int) e2y,
                        rgba< unsigned char >( (int)255, 0, 0 ) );
  }
};

typedef boost::shared_ptr< edgel > edgel_ptr;

};

#endif

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