LineEquation.h

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#ifndef LineEquation_h
#define LineEquation_h

#include <vector>

namespace Isis {
  class LineEquation {
    public:
      LineEquation();
      LineEquation(double x1, double y1, double x2, double y2);

      ~LineEquation() {}
      void AddPoint(double x, double y);
      double Slope();
      double Intercept();
      int Points() {
        return p_x.size();
      };
      bool HaveSlope() {
        return p_slopeDefined;
      };
      bool HaveIntercept() {
        return p_interceptDefined;
      };
      bool Defined() {
        return p_defined;
      };

    private:
      std::vector<double> p_x;       
      std::vector<double> p_y;       
      bool p_defined;           
      bool p_slopeDefined;      
      bool p_interceptDefined;  
      double p_slope;
      double p_intercept;

  }; // end of LineEquation class
}
#endif