Re: Titles break TikZ

From: Hans Hagen <pragma@wxs.nl>
To: Felix Ingram <f.ingram.lists@gmail.com>
Cc: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Titles break TikZ
Date: Wed, 08 Feb 2012 14:50:35 +0100	[thread overview]
Message-ID: <4F327DAB.6040106@wxs.nl> (raw)
In-Reply-To: <CAK5aKC86fbtXmW5+urvwQ=RsHyud7igP8BEAUh7JvbcywMRZKA@mail.gmail.com>

On 8-2-2012 12:16, Felix Ingram wrote:
> On 8 February 2012 10:24, Hans Hagen<pragma@wxs.nl>  wrote:
>> On 8-2-2012 10:51, Felix Ingram wrote:
>>>
>>> On 7 February 2012 13:06, Philipp A.<flying-sheep@web.de>    wrote:
>>>
>>>> with some recent beta (sorry for vagueness), tikz stopped working after
>>>> titles. (i use first-setup.sh to install: these are the betas, not
>>>> something different, right?)
>>
>>
>> what does 'stop working' mean? some message?
>
> "Stop Working" means "no longer get positioned where they should be
> but still get drawn".
>
> In my case all graphics are shifted to the right by
> Some-Unknown-Distance. In Philipp's case the various graphics parts
> jump about. (I've seen something similar when drawing multiple nodes).
>
> I've included my minimal example below again. I wouldn't say that
> titles are causing the issue, it just seems to be that the first
> picture will render okay and then all others from then on will be
> misplaced. In the example that Philipp gave removing the \section line
> will still demonstrate the issue.
>
> Please let me know if there's any more information that I can provide.

Interesting is that it matters if one puts colons after words:

one % :

\pic

two:

\pic

Anyhow, the problem is that tikz messes around with cq. assumes nullfont 
to be in a certain state which is asking for troubles.

In font-set.mkvi there is some provision for this (which I don't like), 
but anyhow, one can uncomment the \dorecurse line

\def\font_preloads_reset_nullfont
   {\dorecurse\plusseven{\fontdimen\recurselevel\nullfont\zeropoint}% 
keep en eye on this as:
    \ctxcommand{resetnullfont()}% in luatex 0.70 this will also do the 
previous
    \globallet\font_preloads_reset_nullfont\relax}

maybe tikz should push/pop nullfont dimens to be on the safe side as 
there is no rule against setting nullfont

(btw, this problem has shown up before)

Hans

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