minor changes and added namespace to avoid conflicts when integrating with PanoPainter

engine/shape.h

@@ -1,5 +1,7 @@
 #pragma once
 
+namespace ui {
+
 class Shape
 {
 protected:
@@ -149,3 +151,5 @@ public:
         return create_buffers(idx, vertices, sizeof(idx), sizeof(vertices));
     }
 };
+
+}