First opengl/x11/window integration.

src/geometry/Point.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "DiscretePoint.h"
+
 #include <memory>
 #include <cmath>
 
@@ -9,6 +11,8 @@ public:
 
     Point(double x, double y);
 
+    Point(const DiscretePoint& point);
+
     Point(const Point& reference, double offSetX, double offSetY);
 
     ~Point();