corner.h

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//
// corner (element) property
// stumeikle Sun May 12 20:31:50 2002
//
//

#ifndef CORNER_H
#define CORNER_H

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

namespace mimas {

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

    public:
  void  setPosition( double x, double y) { centre(0) = x; centre(1) = y; }
  void  setPosition( const Vector &m )  { centre = m; }
  void  setStrength( double s )   { strength = s; }
  void  setContrast( double s )   { strength = s; }
  void  setOrientation( angle a )    { orientation = a; }
  const Vector &getPosition() { return centre; }
  double  getContrast()     { return strength; }

  corner(void) : prop( corner_t ), centre( 2 ) {}

  virtual void draw( image< rgba< unsigned char > > &output,
                      int i, int j, bool c)
  {
      int s;
      if (!c)
    s = 255;
      else
      {
    s = (int)(strength);
    if (s>255) s=255;
      }

      output.setPixel( i-1,j-1, rgba< unsigned char >(0,s,0) );
      output.setPixel( i,j-1, rgba< unsigned char >(0,s,0) );
      output.setPixel( i+1,j-1, rgba< unsigned char >(0,s,0) );
      output.setPixel( i-1,j, rgba< unsigned char >(0,s,0) );
      output.setPixel( i+1,j, rgba< unsigned char >(0,s,0) );
      output.setPixel( i-1,j+1, rgba< unsigned char >(0,s,0) );
      output.setPixel( i,j+1, rgba< unsigned char >(0,s,0) );
      output.setPixel( i+1,j+1, rgba< unsigned char >(0,s,0) );

  }

};

typedef boost::shared_ptr< corner > corner_ptr;

};

#endif

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