diff --git a/Canvas.cpp b/Canvas.cpp
index 5a299e5..cbfd5a0 100644
--- a/Canvas.cpp
+++ b/Canvas.cpp
@@ -97,13 +97,15 @@ void Canvas::mousePressEvent(QMouseEvent* event)
 			params.push_back(x1);
 			params.push_back(y1);
 
-			points.push_back(Point(x1, y1, obj_count));
-			points.push_back(Point(x2, y2, obj_count));
+			points.push_back(new Point(x1, y1, obj_count));
+			points.push_back(new Point(x2, y2, obj_count));
 
 			current_line->p1.x = x1;
 			current_line->p1.y = y1;
 			current_line->p2.x = x2;
 			current_line->p2.y = y2;
+			current_line->p1_ref = points[points.size() - 2];
+			current_line->p2_ref = points[points.size() - 1];
 		}
 		else {
 			*current_line->p2.x = scene.x();
@@ -115,7 +117,9 @@ void Canvas::mousePressEvent(QMouseEvent* event)
 				delete current_line;
 				current_line = nullptr;
 
+				delete points.back();
 				points.pop_back();
+				delete points.back();
 				points.pop_back();
 				delete params.back();
 				params.pop_back();
@@ -237,10 +241,10 @@ void Canvas::mouseMoveEvent(QMouseEvent* event)
 {
 	if (draggedPoint) {
 		QPointF pos = event->pos() - dragOffset;
-		for (Point pair : points) {
-			if (areCoincident(draggedPoint, &pair)) {
-				*pair.x = pos.x();
-				*pair.y = pos.y();
+		for (Point* pair : points) {
+			if (areCoincident(draggedPoint, pair)) {
+				*pair->x = pos.x();
+				*pair->y = pos.y();
 			}
 		}
 		*draggedPoint->x = pos.x();
diff --git a/Canvas.h b/Canvas.h
index d750778..567652c 100644
--- a/Canvas.h
+++ b/Canvas.h
@@ -49,7 +49,7 @@ protected:
 private:
     // ====================== Поиск и выбор ======================
     Line* findAt(QPointF&);                    // ищет линию под курсором
-    Point* findPointAt(QPointF, qreal tolerance = 10.0);
+    Point* findPointAt(QPointF, qreal tolerance = 5.0);
     bool areCoincident(Point*, Point*, bool mode = false);
     // ====================== Параллельность ======================
     bool areAlreadyParallel(Line* l1, Line* l2);           // проверка на дубликат
@@ -61,7 +61,7 @@ private:
     // ====================== Данные сцены ======================
     System               sys;                     // геометрический солвер
     QVector<Line*>       lines;                   // завершённые линии
-    QVector<Point>       points;                  // все точки (для удобного доступа)
+    QVector<Point*>       points;                  // все точки (для удобного доступа)
     std::vector<double*> params;                  // все параметры, передаваемые в солвер
 
     std::set<LinePair> parallelPairs;           // уже запараллеленные пары (защита от дублей)
diff --git a/GCS/Geo.h b/GCS/Geo.h
index 229df9a..faf6efa 100644
--- a/GCS/Geo.h
+++ b/GCS/Geo.h
@@ -228,6 +228,8 @@ public:
     {}
     Point p1;
     Point p2;
+    Point* p1_ref;
+    Point* p2_ref;
     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;
@@ -237,6 +239,7 @@ public:
     void set_tag(int);
     int get_tag();
     bool contains(QPointF, qreal tol = 10.0) const;
+
 };
 
 class Circle: public Curve