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revision 1.98 by tjl, Fri Feb 14 13:08:43 2003 UTC revision 1.99 by tjl, Fri Feb 14 14:50:06 2003 UTC
# Line 427  produces a visually pleasing appearance: Line 427  produces a visually pleasing appearance:
427  rotated so that their virtual y-axis points toward a *nadir*  rotated so that their virtual y-axis points toward a *nadir*
428  at approximately one screen height below the physical screen.  at approximately one screen height below the physical screen.
429    
430    .. figure:: nadirGeometry
431       :label: fignadirgeom
432       :width: 8.45cm
433      
434       The nadir rotations explained geometrically. The items on screen
435       are rotated so that their local vertical axis points to
436       the vanishing point (nadir) placed outside the screen.
437    
438    Interestingly, it appears in our experience
439    that the placement of the nadir should
440    be an absolute *angle* below the center of the screen from
441    the viewer's point of view, rather than related to the size
442    of the screen.
443    
444  The benefit of the nadir view is not only the appearance  The benefit of the nadir view is not only the appearance
445  but also it makes the different pieces of text on the screen  but also it makes the different pieces of text on the screen
446  visually more distinct from each other,  visually more distinct from each other,

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