SVG2 Implementation note: figure 6.3.1 not Formatting/rendering

[MadLittleMods]

In the SVG2 Appendix C: Implementation Requirements document, figure 6.3.1 is not formatting/rendering correctly in Chrome v40.0.2214.111. It does work in Firefox v35.0.1.

I am not sure if this is a problem with the syntax, MathML, MathJax, or Chrome. Should it just be converted to an image like the others?

Figure 6.3.1 was an image in the previous draft

I sent a message to the mailing list before I discovered the SVG WG on GitHub and thought this might be more appropriate.

[heycam]

Thanks for filing the issue. Yes it should be converted to use MathJax using the markup format that some of the formulae in painting.html have been (<div role="math" ...><math xmlns="..." ...>). Please feel free to file a PR if you have time! 😄

[MadLittleMods]

@heycam Your response is a bit confusing to me. Figure 6.3.1 is in the MathML format. In Chrome, when you look at the dev console, you see Uncaught ReferenceError: local is not defined from load-mathjax.js:3 which is I assume is the problem. The other equations work because they are images.

But I assume you mean it should be converted over to LaTeX MathJax. I'll make a PR.

Rendered demo

\[
\begin{pmatrix}
  x\\ 
  y
\end{pmatrix}
=
\begin{pmatrix} 
  cos\phi     & -sin\phi\\
  sin\phi     & cos\phi
\end{pmatrix}
\cdot
\begin{pmatrix}
  r_xcos\theta\\
  r_ycos\theta
\end{pmatrix}
+
\begin{pmatrix}
  c_x\\ 
  c_y
\end{pmatrix}
\]

[heycam]

Thanks, Eric. I've found a problem with the MathJax script reference from the spec, which I'll look into.

Here is an example of one I converted to MathJax earlier: https://github.com/w3c/svgwg/blob/master/master/painting.html#L1186

So that uses MathML and a "readable" plain text version. But LaTeX should work too, as we're using the MathJax version that should accepts that and MathML. (And for a more complex thing like this matrix, the LaTeX itself might be the best "readable" plain text version we can provide.)

[MadLittleMods]

@heycam How do I build the site to test my changes? I assume it has something to do with https://github.com/MadLittleMods/svgwg/tree/master/tools/publish

[heycam]

Yes those scripts are used for building the spec. If you have the right build prerequisites installed, you can just run make from within the root of the checkout (i.e. the svgwg directory). You will need make, python, perl, node (will it work with io.js, not sure, haven't tested!) and rsync.

[heycam]

OK I fixed the problem with loading MathJax in f301d27 and 15663b5.

[MadLittleMods]

Do you still want to use LaTeX for that formula? And maybe convert the others eventually.

[heycam]

I guess MathML (still handled by MathJax) is slightly preferable, as then if MathJax doesn't work then at least there is a chance of viewing something. Although maybe seeing the LaTeX fallback is better? Let's stick with MathML for now and if the WG decides to switch to LaTeX for the source we'll do that later.

[MadLittleMods]

kk, Thank you for the quick response and resolution.

[heycam]

Are you still able to convert the markup of those formulae in implnote.html to the format as used in painting.html (e.g. with the wrapping <div role="math"> etc.)? That still needs to be done.

[MadLittleMods]

Yes. Sorry it was unclear to me.

[MadLittleMods]

Made PR #11 to update implnote.html Figure 6.3.1 markup.