Adde camera class

cpp/src/camera.hpp

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "math.hpp"
+
+class Camera
+{
+public:
+  WindowPos WorldToWindow(WorldPos) const;
+  WorldPos WindowToWorld(WindowPos) const;
+
+private:
+  // TODO this should be replaced with a matrix
+  float m_Zoom;
+  WorldPos m_RectCorner; // upper left corner (0,0) of the drawn regios
+
+};