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From: chesnutt@adobe.com (Stan Chesnutt)
Newsgroups: comp.lang.postscript
Subject: Uniform Coordinate Space (was Re: 72.27! etc.)
Message-ID: <1745@adobe.UUCP>
Date: 3 Feb 90 20:34:30 GMT
References: <137@macuni.mqcc.mq.oz> <9001220213.aa05139@blackbox.gore.com> <152@macuni.mqcc.mq.oz> <128@heaven.COM> <846@tuewsd.lso.win.tue.nl>
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Reply-To: chesnutt@adobe.COM (Stan Chesnutt)
Organization: Adobe Systems Incorporated, Mountain View
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In article <846@tuewsd.lso.win.tue.nl> wsinkees@lso.win.tue.nl (Kees Huizing) writes:
>glenn@heaven.woodside.ca.us (Glenn Reid) writes:
>
>>	.352778 dup scale	% I may have this inverted :-)
>
>>Now you can think in millimeters (or in your case, millimetres).  The "point"
>>(or a close approximation thereof) was chosen for convenience to the
>>typesetting industry, to whom a 4.2334 millimeter font means nothing.
>
>This is NOT the way to do it, unfortunately.  Everything will be scaled:
>linewidth, font sizes, etc.
>

Exactly.  What the scale command does is give you a new system of measurement
for ALL objects (text, graphics) on the page.  If I use Glenn Reid's scale
factor, then every position and size I specify will be in terms of that scale
factor.  So, if the coordinate system is adjusted (via the scale command)
to the "true point size" (72.27) for text, that measurement will also apply
for everything else.  Linewidths will be specified in this new system, movetos,
linetos, etc.  Take a look at the Red Book pages 64-70 for a complete explanation
of scaling and other operations performed upon the coordinate space.

If a uniform scaling system (and thereby uniform measurement system) is
NOT what you want, please explain further in a follow-up exactly what
you are trying to do.


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Stan Chesnutt,  Adobe Systems  chesnutt@adobe.com {sun|decwrl}!adobe!chesnutt
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