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[no subject]

There should be a function like TV-DRAW-LINE that clips the arguments
so that they will fit on the screen and then calls TV-DRAW-LINE.  This
is very important for random graphic hacks that people want to whip up
quickly, to prevent them from dying all over the place, in cases in which
the inefficiency of the clipping (not so terrible) is not very important.
This sort of thing is important for making Lisp Machines a truly convenient
programming environment.