🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: gnu.misc.discuss
Article #73160

gpic(1) manual wanted

#73160
From: Jonathan Thornburg
Date: Tue, 29 Oct 1991 08:20
27 lines
1656 bytes
Does anyone have a manual for "GNU pic version 1.01", or a pointer
to same?  It works, but I'm having a lot of trouble trying to
figure out various details from "syntax error at line 33", the
doesn't-explain-many-things man page, and a 10 year old paper by
Kernighan describing the original pic.

Failing that, has anyone persuaded it to understand negative
numbers?  The input
	dy = 0.64
	ymin = 0.12
	ylow = ymin - dy
	print ylow
produces the output (Sun SPARC, IEEE floating point)
	2.39344e-259
which suggests that something fishy is going on!

Failing *that* has anyone figured out a way to program line clipping
(so I can crosshatch a region) without using negative numbers :-( ?

Thanks 1.0e6,
-- 
- Jonathan Thornburg                       jonathan@geop.ubc.ca
  Dept. of Geophysics & Astronomy         thornburg@mtsg.ubc.ca
  2219 Main Mall                        thornbur@physics.ubc.ca
  The University of British Columbia    userbkis@ubcmtsg.bitnet
  Vancouver     BC     V6T 1Z4
  Canada
Technical Details
Message-ID: <1991Oct29.082050.19617@cs.ubc.ca>
Path: arc1-ca.pugleaf.net!gmdzi!zeus.ieee.org!sdd.hp.com!mips!pacbell.com!lll-winken!aunro!alberta!kakwa.ucs.ualberta.ca!unixg.ubc.ca!ubc-cs!rubis!jonathan

Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 1025b4,ace19727dfce8c57,start
X-Google-Attributes: gid1025b4,public
X-Google-ArrivalTime: 1991-10-29 04:55:51 PST
Path: arc1-ca.pugleaf.net!gmdzi!zeus.ieee.org!sdd.hp.com!mips!pacbell.com!lll-winken!aunro!alberta!kakwa.ucs.ualberta.ca!unixg.ubc.ca!ubc-cs!rubis!jonathan
From: jonathan@rubis.geop.ubc.ca (Jonathan Thornburg)
Newsgroups: gnu.misc.discuss
Subject: gpic(1) manual wanted
Message-ID: <1991Oct29.082050.19617@cs.ubc.ca>
Date: 29 Oct 91 08:20:50 GMT
Sender: usenet@cs.ubc.ca (Usenet News)
Organization: Dept. of Geophysics and Astronomy, University of B.C.
Lines: 27