Re: Ugly bug with TikZ in recent ConTeXt MKIV

[Alan BRASLAU <alan.braslau@cea.fr>]

On Thursday 18 November 2010 00:00:33 Mojca Miklavec wrote:
> Dear Hans,
> 
> The following example worked perfectly fine with the version of
> ConTeXt MKIV I was using one hour ago (no idea which version, but
> something less than two weeks old). It still works OK with MKII and it
> works much worse in the real document that I'm using.
> 
> In my document both images are completely screwed up. Here it's only
> the second one and if I comment out the first one, the second figure
> comes out fine, so I'm a bit clueless about what magic is going on
> inbetween.
> 
> Nothing in TikZ has changed (I'm still using the "frozen" version from
> November 2009 from minimals), so it must have something to do with
> ConTeXt MKIV. It just messes up with some boxes on the page in some
> unpredictable way.
> 
> \usemodule[tikz]
> \starttext
> \placefigure[force][BCl3 sigma]{x}{
> \hbox to .9\textwidth{\hss\starttikzpicture
> \node[circle,inner sep=0pt] (B) at (0,0) {B};
> \node[circle,inner sep=0pt] (a1) at ( 90:0.9cm) {Cl};
> \node[circle,inner sep=0pt] (a2) at (210:0.9cm) {Cl};
> \node[circle,inner sep=0pt] (a3) at (330:0.9cm) {Cl};
> \draw (B)--(a1);
> \draw (B)--(a2);
> \draw (B)--(a3);
> \stoptikzpicture
> \hbox to 2cm{}
> \starttikzpicture[>=stealth,very thick]
> % \node[label=above:$a_1$] (a1) at ( 90:1cm) {$a_1$};
> \node[circle,inner sep=0pt] (a1) at ( 90:1.2cm) {$a_1$};
> \node[circle,inner sep=0pt] (a2) at (210:1.2cm) {$a_2$};
> \node[circle,inner sep=0pt] (a3) at (330:1.2cm) {$a_3$};
> % \draw[->] (0,0)--(-30:1cm);
> % \draw[->] (0,0)--( 90:1cm);
> % \draw[->] (0,0)--(210:1cm);
> \draw[->] (0,0)--(a1);
> \draw[->] (0,0)--(a2);
> \draw[->] (0,0)--(a3);
> \stoptikzpicture\hss}
> }
> \stoptext
> 
> Thanks,
>    Mojca

Seems to work OK for me.

Alan

P.S. You can try (I did not look into "stealth"):

\usemodule[tikz]
\starttext
\placefigure[force][BCl3 sigma]{x}{
\hbox to .9\textwidth{\hss\starttikzpicture
\node[circle,inner sep=0pt] (B) at (0,0) {B};
\node[circle,inner sep=0pt] (a1) at ( 90:0.9cm) {Cl};
\node[circle,inner sep=0pt] (a2) at (210:0.9cm) {Cl};
\node[circle,inner sep=0pt] (a3) at (330:0.9cm) {Cl};
\draw (B)--(a1);
\draw (B)--(a2);
\draw (B)--(a3);
\stoptikzpicture
\hbox to 2cm{}
\starttikzpicture[>=stealth,very thick]
\node[circle,inner sep=0pt] (a1) at ( 90:1.2cm) {$a_1$};
\node[circle,inner sep=0pt] (a2) at (210:1.2cm) {$a_2$};
\node[circle,inner sep=0pt] (a3) at (330:1.2cm) {$a_3$};
\draw[->] (0,0)--(a1);
\draw[->] (0,0)--(a2);
\draw[->] (0,0)--(a3);
\stoptikzpicture\hss}
}

\placefigure [force] [BCl3 sigma bis]{x}{
	\framed [frame=off,width=.9\textwidth] {
	\startMPcode
	label(textext("B"),(0,0));
	for i=1 upto 3:
		pair p; p := (0.9cm,0) rotated (90+120(i-1));
		draw (p scaled .25)--(p scaled .75);
		label(textext("Cl"),p);
	endfor
	\stopMPcode
	\hbox to 2cm{}
	\startMPcode
	for i=1 upto 3:
		pair p; p := (1.2cm,0) rotated (90+120(i-1));
		drawarrow (0,0)--(p scaled .75)
			withpen pencircle scaled 1pt ;;
		label(textext("$a_"&decimal i&"$"),p);
	endfor
	\stopMPcode
	}
}

\stoptext
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