aliftype / euler-otf Goto Github PK

Hi there, \mapsto (U+21A6) in Neo Euler seems to be missing? It's a \to arrow with a short vertical bar on the left. It would be good to add it to the font because it's a widely used symbol in any math document concerning functions and maps.

The \widehat symbol does not seem to stretch in the way that it does in other fonts, as this example shows:

\documentclass{article}
\usepackage{fontspec}
\setmainfont{TeX Gyre Pagella}
\usepackage{unicode-math}
\begin{document}

\setmathfont{TeX Gyre Pagella Math}
Is the hat as wide as we need: $\widehat{\mathstrut α_1-α_3}$ ?

\setmathfont{Neo Euler}
Is the hat as wide as we need: $\widehat{\mathstrut α_1-α_3}$ ?
\end{document}

Perhaps Neo Euler could borrow some of the symbols from TGPagella?

(I'm not saying that this is a good notation by the way! It's someone else's that I need to follow.)

It would be nice if Neo-Euler would have a \hslash glpyh (U+210F).
It shouldn't be too difficult to design such a glyph starting from 'h' in U+210E.

It seems to me that the font is missing vertical ellipsis ($\vdots$, uni22EE).
At least ConTeXt doesn't print them when I try to typeset a matrix.

Can you add \bot (22A5) and \top (22A4) symbols?

In general, what is your policy on adding missing symbols? I know that completing the font while making sure that the symbols look like the handwriting of mathematicians is difficult. But it will be nice to have all the "standard" math symbols (i.e., those defined in plain.tex)

Thanks,
Aditya

Only the \hat accent works with euler-otf. \vec gives a broken vector, and other accents are simply ignored. I think that this may be due to the implementation differences between unicode-math and context.

Here is a minimal example.

\starttypescript    [math]     [euler][name]
  \definefontsynonym[MathRoman][name:Neo Euler] [features=math]
\stoptypescript

\definetypeface [mainface] [rm] [serif] [palatino] [default] [features=oldstyle]
\definetypeface [mainface] [mm] [math]  [euler] [default]  

\setupbodyfont[mainface,12pt]
\starttext
\startlines
acute       $\acute a$
grave       $\grave a$
ddot        $\ddot a$
tilde       $\tilde a$
mathring    $\mathring a$
bar         $\bar a$
breve       $\breve a$
check       $\check a$
hat         $\hat a$
vec         $\vec a$
dot         $\dot a$
widetilde   $\widetilde a$
widehat     $\widehat a$
\stoplines
\stoptext

The symbols \prec, \succ, and their "or equals" equivalents \preccurlyeq, \succcurlyeq, \preceq, \succeq, (U+227A, U+227B, U+227C, U+227D, U+2AAF, U+2AB0) seem to be missing.

(Other variants on the \prec and \succ symbols at U+227E ... U+2281, U+22DE ... U+22E1, U+22E8, U+22E9, U+2AB1 ... U+2ABC are also missing, but are probably less commonly used.)

I've recently been working with free Open Type Math fonts and noticed that Neo Euler was the only one missing the following characters:

• Double-Struck
• SansSerif
• Monospace

The first set is necessary to implement LaTeX commands like \mathbb ( issue #2 ) and in general these sets of characters are used by MathML-based applications (e.g. to implement the mathvariant attribute).

In ConTeXt, $\vec{r}$ only shows a small dash instead of an arrow above 'r'. \vec for other characters seem to work well though.

Minimal example:

\usetypescript[palatino][ec]
\definetypeface [palatino] [mm] [math] [euler] [euler] [rscale=1.03] 
\setupbodyfont[palatino,12pt]

\starttext
$\vec{r}$.
\stoptext

Blackboard bold does not work with Context. Not sure if it is the fault of context mappings or are the glyphs missing from the font.

\starttypescript    [math]     [euler][name]
  \definefontsynonym[MathRoman][name:Neo Euler] [features=math]
\stoptypescript

\definetypeface [mainface] [rm] [serif] [palatino] [default] 
\definetypeface [mainface] [mm] [math]  [euler] [default]  

\setupbodyfont[mainface,12pt]
\starttext
$\Bbb ABCDEFGHIJKLMNOPQRSTUVWXYZ$
\stoptext

I noticed that the \hbar glyph (U+210F) is rendered incorrectly on Acrobat Reader 9 on Linux.
At a resolution up to 400% there is white spot in the middle of the crossing between stem and bar.
At a resoluition of higher than 400% the glyph is rendered correctly.

I suspect that there may be a problem of even-odd filling as the bar is just overlaid on top the step
and the glyph is not drawn in one piece.

If it's not a secret, I would like to know why this project is abandoned?

Hi,
I was wondering what would be needed to finish the font.
I’m learning font designing and I do like this font so I’d like to help porting eulervm to otf.

Hi,

In ConTeXt \widetilde does not scale with the size of the glyph. For example, using context 2016.09.09 the following test file:

\usetypescriptfile[euler]
\definetypeface[mainfont][rm][serif][palatino][default]
\definetypeface[mainfont][mm][math] [pagellaovereuler][default]

\setupbodyfont[mainfont,12pt]
\appendtoks \rm \to \everymathematics

\starttext
$\tilde M$, $\widetilde M$, $\widetilde{ab}$
\stoptext

I get the following:

Any hints on whether this is a bug with the font or context mappings?

Hi, it seems that \dagger (U+2020) symbol is missing? It would be nice to add this commonly used symbol.

It would be nice if Neo-Euler would have a bold \nabla (U+1D6C1).
It shouldn't be too difficult to design such a glyph, given that there is already
a non-bold \nabla as a reference design and bold \Delta (for the stroke thickness).

The OFL FAQ recommends to use "Reserved Font Name" and to include a font log.
http://scripts.sil.org/cms/scripts/page.php?item_id=OFL-FAQ_web#7c3969d3

I am currently editing a mathematics text book. I decided to use Euler Math for the formulae.
As I am using xelatex, it was natural to try unicode-math with Neo Euler. It turns out that the LaTeX-comand \emptyset does not produce a glyph. Looking into the lof file uncovered, that for this symbol a glyph appears to be missing in the font.

My question is, will there be such a glyph in the font in the near future?
If not, can you advise me an alternative way to get this symbol, while still using Neo Euler?

Hello :-),

What is the state of this project please? Is it in pause, dead, inactive?

I do not know whether this is an issue of the font Neo Euler or whether it is related to the package unicode-math. The following is the problem: In a displayed formula like
\sum_{i=1}^{n}
The indices of the sum seem to touch the Sigma. Moreover, they do not stand (hang) centrally on (below) the Sigma.

I tried it with the non-unicode version of Euler, and there everything works.
The problem is also visible in the test-file "test-1.ltx".