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From: liam@qmc-cs.UUCP
Newsgroups: net.text,net.unix
Subject: Re: (ti)troff question - horizontal motion and drawing arguments
Message-ID: <157@cs.qmc.ac.uk>
Date: Fri, 13-Jun-86 08:13:04 EDT
Article-I.D.: cs.157
Posted: Fri Jun 13 08:13:04 1986
Date-Received: Tue, 17-Jun-86 22:03:14 EDT
References: <274@rtech.UUCP>
Reply-To: liam@cs.qmc.ac.uk (William Roberts)
Followup-To: net.text
Distribution: net
Organization: CS Dept, Queen Mary College, University of London, UK.
Lines: 29
Xref: watmath net.text:1157 net.unix:8159
Summary: you CAN use expressions in \h


You can use expressions inside \h constructs (and most other
things that require numbers). For example, pic generates lots
of lines that say things like

\h'-0.0m'\v'0.2m'\h'-\w'text'u/2u'text\h'-\w'text'u/2u'

Breaking this up gives

  Move right 0 :-)                        \h'-0.0m'
  Move down 0.2 m                         \v'0.2m'
  Move left half the width of "text"      \h'-\w'text'u/2u'
  Print the letters t e x t               text
  Move left half the width of "text"      \h'-\w'text'u/2u'

Are you sure that your problem wasn't due to the fact that

        \h'8*\w' 'u'
means   \h'8m*\w' 'u'   because the default unit for \h is ems?

BTW, pic knows that strings like "doesn't" can't be delimited by
quote, so it switches to \(ts (yes, you can use special
characters as delimiters). If you really want it to die badly,
use a string such as "it's \(ts, the sigma variant!"....
-- 

William Roberts                 ARPA: liam@cs.qmc.ac.uk
Queen Mary College              UUCP: liam@qmc-cs.UUCP
LONDON, UK