convert pgf to g-code

has anyone played around w/ converting pgf/tikz commands to output g-code instead of tex, pdf, etc?   for
many 2d cnc operations this would be very useful.

-SM-


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Re: convert pgf to g-code

With pgf... no, but I did play with creating g-code from other kind of
stuff (like depth maps).

For straight lines it should be pretty straightforward. For arcs, there's
a bit of math involved. For other kind of curves... I think the easiest
way is to split them into many small segments and join them with G64
(corner rounding).

> has anyone played around w/ converting pgf/tikz commands to output g-code
> instead of tex, pdf, etc?   for many 2d cnc operations this would be very
> useful.
>
> -SM-
>
>
> ------------------------------------------------------------------------------
> Learn how Oracle Real Application Clusters (RAC) One Node allows customers
> to consolidate database storage, standardize their database environment,
> and,
> should the need arise, upgrade to a full multi-node Oracle RAC database
> without downtime or disruption
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> pgf-users mailing list
> pgf-users <at> lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/pgf-users
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Re: convert pgf to g-code

using pgf source is preferred to get the graphical feedback and documentation w/o a commercial
windows-based cad package.  most ops are simple straight cuts, circular arcs, etc. so a dictionary lookup
is straightfoward.   what you really want is the compiler though, so you can build hierarchical
structures, loops, etc.   does pgf output an intermediate machine-like code, or is this simply the tex
code?  my impression has been that pgf is more than a tex pre-processor, so it should be possible to bind
another output, but perhaps i'm mistaken.   

-SM-

On Jan 2, 2011, at 10:10 PM, Alexandru Dumitrache wrote:

> With pgf... no, but I did play with creating g-code from other kind of
> stuff (like depth maps).
> 
> For straight lines it should be pretty straightforward. For arcs, there's
> a bit of math involved. For other kind of curves... I think the easiest
> way is to split them into many small segments and join them with G64
> (corner rounding).
> 
>> has anyone played around w/ converting pgf/tikz commands to output g-code
>> instead of tex, pdf, etc?   for many 2d cnc operations this would be very
>> useful.
>> 
>> -SM-
>> 
>> 
>> ------------------------------------------------------------------------------
>> Learn how Oracle Real Application Clusters (RAC) One Node allows customers
>> to consolidate database storage, standardize their database environment,
>> and,

Bees in tikz Space

Dear all, 

The code below creates a nice bee picture with tikz. It was created 
by a student of mine as part of an assignment. The student's name is 
Alan Forde. Happy tikz-ing.

Regards,

Marc van Dongen

\documentclass[12pt]{article}
\usepackage[usenames,dvipsnames]{xcolor}
\usepackage{tikz}

\title{BEELINE\linebreak\linebreak \linebreak A Mathematical BEE }
\author{Thomas Alan Forde \thanks{Thanks to the Mathematicians}}
\date{March 2010}

\begin{document}

  \tikzstyle{bodyfill}=[line width=.2pt, color=yellow!50, fill=yellow!50]
  \tikzstyle{headline}=[line width=2pt, color=black!200,fill=yellow!50]
  \tikzstyle{bodyline}=[line width=3pt, color=black!200,fill=yellow!50]
  \tikzstyle{eyeline}=[line width=2pt, fill=white]
  \tikzstyle{outline}=[line width=2pt]
  \tikzstyle{wingline}=[line width=2pt, fill=yellow!20]
  \tikzstyle{eyeball1}=[line width=.1pt, fill=black]
  \tikzstyle{eyeball2}=[line width=.1pt, color=white, fill=white]
  \tikzstyle{leg}=[line width=2pt]
  \tikzstyle{shadow}=[line width=.1pt, color=gray!15, fill=gray!15]

conditionals on node existence

Hey folks,

I would like to be able to conditionally add a node based on whether
another node already exists.

I'm building a multi-day time table, I set up a table of invisible
nodes named with the venue and timeslot:

     A      B     C
1   A-1  B-1  C-1
2   A-2  B-2  C-2
3   A-3  B-3  C-3

Then I use the fit library to overlay the actual sessions over the top
of the table. This method works really
well as it easily allows me to have sessions that span venues (e.g.
lunch) or sessions that span multiple slots,
e.g. a half day tutorial.

Due to space constraints, I can't display the entire timetable on one
page, and have to split it up. I'd like to able
to display just a portion of the timetable, loop over each session,
and only attempt to fit the session if the given
node exists, but I can't figure how to do that at all. I've tried
tracing through some simple node names, but
very quickly get lost, and can't figure out what is actually defined
to the node name.

Thanks for any pointers,
--

-- 

Re: convert pgf to g-code

You can go to the system layer (if I remember well) and you'll find the
low-level paths, after TikZ executes its loops and all the high level
processing. From there you can extract the points and output the G-code.

Probably the most elegant method is to create a new output backend (like
the PDF, PS, SVG). It's not easy to do, but with the help of someone who
knows pgf/tikz internals, it is possible.

A few months ago I did some experiments with overriding tikz <at> finish and
passing the points to a lua script (in lualatex), with partial success.
Some code:

\def\tikz <at> finish{\message{^^Jtest^^J}
    \pgfsyssoftpath <at> getcurrentpath{\thePath}
    \directlua{intercept([[\meaning\thePath]], [[\meaning\tikz <at> mode]])}
    \orig <at> tikz <at> finish}

> using pgf source is preferred to get the graphical feedback and
> documentation w/o a commercial windows-based cad package.  most ops are
> simple straight cuts, circular arcs, etc. so a dictionary lookup is
> straightfoward.   what you really want is the compiler though, so you can
> build hierarchical structures, loops, etc.   does pgf output an
> intermediate machine-like code, or is this simply the tex code?  my
> impression has been that pgf is more than a tex pre-processor, so it
> should be possible to bind another output, but perhaps i'm mistaken.
>
> -SM-
>
> On Jan 2, 2011, at 10:10 PM, Alexandru Dumitrache wrote:
>

Re: conditionals on node existence

Hi,

Basically, for a node named `foo' you need to test for the existence of 
\pgf <at> sh <at> ns <at> foo. Two ways are shown below:

\documentclass{article}
\usepackage{tikz}
\begin{document}
\makeatletter
\def\pgfifnamednodeexists#1#2#3{%
   \edef\pgf <at> temp{pgf <at> sh <at> ns <at> #1}%
   \expandafter\pgfutil <at> ifundefined\expandafter{\pgf <at> temp}{#3}{#2}}
\makeatother

\tikz\node (foo) {FOO};

\foreach \nodename in {foo,bah}{
   \pgfifnamednodeexists{\nodename}{Node `\nodename' exists}{Node 
`\nodename' does not exist}
   \par
}

\newif\iftikznodeexists
\def\tikztestnodeexists#1{\pgfifnamednodeexists{#1}{\tikznodeexiststrue}{\tikznodeexistsfalse}}

\foreach \nodename in {foo,bah}{
   \tikztestnodeexists{\nodename}
   Node `\nodename'
   \iftikznodeexists
     exists

Designing edges with shape

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Phylogenetic tree (Tree where all leaves are levelled)

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pgfpages rotation bug still there

Hello all,

I use pgfpages frequently on many computers and I always stumble upon
this bug. It's in the bug tracker (ID: 1911195) and was also discussed
on the list (topic ``pgfpages and rotation'' from 2009-11-25) where even
a fix is mentioned (which I manually have to ``install'' on every
computer I work). The bug is present in the latest release 2.10 and IMHO
also in the cvs. Is there any chance to get rid of this bug or do I
overlook something?

Regards, Chris

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should the need arise, upgrade to a full multi-node Oracle RAC database 
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