Отрисовка окружности

GCS/Geo.h

@@ -173,6 +173,8 @@ public:
 /// A base class for all curve-based objects (line, circle/arc, ellipse/arc).
 class Curve
 {
+protected:
+    int tag;
 public:
     virtual ~Curve()
     {}
@@ -212,12 +214,13 @@ public:
     // DeepSOIC: I haven't found a way to simply copy a curve object provided pointer to a curve
     // object.
     virtual Curve* Copy() = 0;
+
+    void set_tag(int);
+    int get_tag();
 };
 
 class Line: public Curve
 {
-private:
-    int tag;
 public:
     Line()
     {}
@@ -238,7 +241,6 @@ public:
     Line* Copy() override;
 
     void set_tag(int);
-    int get_tag();
     bool contains(QPointF, qreal tol) const;
 
 };
@@ -253,12 +255,14 @@ public:
     ~Circle() override
     {}
     Point center;
+    Point* center_ref;
     double* rad;
     DeriVector2 CalculateNormal(const Point& p, const double* derivparam = nullptr) const override;
     DeriVector2 Value(double u, double du, const double* derivparam = nullptr) const override;
     int PushOwnParams(VEC_pD& pvec) override;
     void ReconstructOnNewPvec(VEC_pD& pvec, int& cnt) override;
     Circle* Copy() override;
+    void set_tag(int);
 };
 
 class Arc: public Circle