- Concert Hall (student project at Chalmers) -   - The model is parametrically described. Basic setting -   - Changing the fan angle (one number) -   - Changing the ceiling height (one number) -   Note that all ceiling coordinates are here automatically calculated by use of the cut() function and the ceiling is perfectly flat (not so clear from the bitmaps). If a hall has depedencies that can be described mathematically, modeling can be very efficient and accurate.