-/// The width of the display (this is a logical value, not the physical value)
-static const float SCREEN_WIDTH = 800;
-/// The height of the display (this is a logical value, not the physical value)
-static const float SCREEN_HEIGHT = 600;
+/** The width of the display (this is a logical value, not the
+ physical value, since aspect_ration and projection_area might
+ shrink or scale things) */
+extern int SCREEN_WIDTH;
+
+/** The width of the display (this is a logical value, not the
+ physical value, since aspect_ration and projection_area might
+ shrink or scale things) */
+extern int SCREEN_HEIGHT;