Convert visual layers to scene nodes.

src/geometry/Point.h

@@ -9,7 +9,7 @@ class Point
 {
 public:
 
-    Point(double x, double y, double z = 0);
+    Point(double x = 0, double y = 0, double z = 0);
 
     Point(const DiscretePoint& point);
 
@@ -33,6 +33,17 @@ public:
 
     double getDeltaY(const Point& point) const;
 
+    bool operator==(const Point& rhs) const
+    {
+       return (mX == rhs.mX)
+       && (mY == rhs.mY)
+       && (mZ == rhs.mZ);
+    }
+    bool operator!=(const Point& rhs) const
+    {
+      return !operator==(rhs);
+    }
+
 private:
     double mX{0};
     double mY{0};