Path: utzoo!attcan!uunet!samsung!think!snorkelwacker!bloom-beacon!primerd!choinski
From: choinski@primerd.prime.com
Newsgroups: comp.sys.amiga
Subject: Re: VLT problem: TEK screen to PS file
Message-ID: <31100008@primerd>
Date: 21 Nov 89 16:01:00 GMT
References: <25697@<1035>
Lines: 45
Nf-ID: #R:<1035:-2569700:primerd:31100008:000:1886
Nf-From: primerd.prime.com!choinski    Nov 21 11:01:00 1989


[Lineaters...very dangerous...you go first!]

||myb100@csc.UUCP (Markus Buchhorn) asks:
||
||My PS interpreter produces a `nocurrentpoint' error at a `show' statement. 
||
||What follows is part of the PS header which defines the commands:
||
||/m  {stroke newpath moveto}        bdef
||/d  {lineto}                       bdef
||/p  {stroke newpath moveto domark} bdef
||/s  {stroke newpath show}          bdef
                      ^^^^ this is the problem

||0 3068 m (I) s          |
||52 3068 m (N) s         |
||104 3068 m (P) s        |---- This is the text which causes problems.
||156 3068 m (U) s        |---- (remove it => no errors)
||208 3068 m (T) s        |---- and is the only place where the `s' is used
            ^^ see text below

In postscript, before you do a show, you must provide a current point
thourgh the use of a "moveto" command.  The "m" function as defined
"uses up" the current point you last set.  Try either inserting another
set of coordinates like:

208 3068 m 208 3068 (T) s

and that will solve the problem (although you may requre different coordinates
then the ones I have provided here)  Other problems exist, though.

||I find (i) newpath wipes the path, (ii) stroke wipes the path and
||(iii) show comes straight after these commands. This doesn't make any 
||sense to me, however, I'm not a PS guru.

I admit, I am baffeled as to why the rest of your code doesn't croak when it 
does the "m" commands.  Something is scrod in your interpreter.

-============================================================================-
 Burton Choinski                                       choinski@env.prime.com
   Prime Computer, Inc.                                  (508) 879-2960 x3233
   Framingham, Ma.  01701
 Disclaimer:  Hey, not me man; musta been my evil twin.
-============================================================================-