I added two new methods to GR_Graphic: static s_getScreenResolution() which is used in ut_units for conversions from and to pixels, and setStaticScreenResolution(), which is used to set the resolution returned by the former.
All derived graphic classes that do not have a hardcoded screen resolution, but rather obtain it from the system have to call the latter method in their constructor -- I have done this for Win32; on Unix this is not needed as resolution is hardcoded at 100. files: gr_Graphics.h/cpp, gr_Win32Graphics.cpp, ut_units.cpp Tomas
