circle_provider.h

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#ifndef CIRCLE_PROVIDER_1USEBX40
#define CIRCLE_PROVIDER_1USEBX40

#include <vector>

#define CIRCLE_REF(c,r,x,y) c[(y+r)*(2*r + 1) + (x+r)]

namespace bwi_mapper {

  class CircleProvider {
    public:

      static CircleProvider& getInstance();

      void getCircle(int radius, std::vector<bool>& points, 
          bool connect4 = true);

      
      void printCircle(const std::vector<bool>& points, int radius);

    private:

      CircleProvider () {}

      CircleProvider (CircleProvider const&); //Don't implement

      void operator=(CircleProvider const&); //Don't implement

      
      void plot8Points(int x, int y, std::vector<bool>& points, int radius);

      void plot4Points(int x, int y, std::vector<bool>& points, int radius);

  }; /* CircleProvider */

} /* bwi_mapper */

#endif /* end of include guard: CIRCLE_PROVIDER_1USEBX40 */