underbraces slightly too narrow (with MkIV 2013.05.28)
In certain cases, display-mathunderbraces are not quite wide enough. Here's a minimal example: =================== \starttext \placeformula\startformula \underbrace{15\,\tf cm}_{L} \stopformula \stoptext =================== Using 2013.05.28 00:36 MKIV (from vanilla TL2013), the left brace tip starts under the vertical bar of the "1", instead of enclosing the serif as well. The right brace tip ends between the last two tines of the "m", instead of enclosing the whole "m" and its serifs. With 2013.04.09 10:38 MKII, the brace tips extend just slightly beyond the "15 cm", which is better. However, they seem slightly too close. As a test, I ran the comparable plain-TeX file through LuaTeX and PDFTeX. ================== $$ \underbrace{15\,\rm cm}_{L} $$ \bye ================== The gap between the right brace tip and the text is slightly greater (with either LuaTeX or PDFTeX), and it looks right. (With the 2012.05.30 MKIV on live.contextgarden.net, the result is similar to the Lua/PDFTeX versions, though not identical, and also looks reasonable.) -Sanjoy
On 2013–07–10 Sanjoy Mahajan wrote:
In certain cases, display-mathunderbraces are not quite wide enough. Here's a minimal example:
=================== \starttext
\placeformula\startformula \underbrace{15\,\tf cm}_{L} \stopformula
\stoptext ===================
\starttext \placeformula\startformula \underbrace{\unit{15 cm}}_{L} \stopformula \stoptext Marco
On Wed, Jul 10, 2013 at 02:13:28PM +0200, Marco Patzer wrote:
On 2013–07–10 Sanjoy Mahajan wrote:
In certain cases, display-mathunderbraces are not quite wide enough. Here's a minimal example:
=================== \starttext
\placeformula\startformula \underbrace{15\,\tf cm}_{L} \stopformula
\stoptext ===================
\starttext
\placeformula\startformula \underbrace{\unit{15 cm}}_{L} \stopformula
\stoptext
Marco
Hello *, I played just a little, normaly I have nothing to do with math-formulae:: \starttext \placeformula\startformula \underbrace{\unit{15 cm}\hskip2pt}_{L} \stopformula \stoptext Best regards, Rudolf
On 7/10/2013 2:02 PM, Sanjoy Mahajan wrote:
In certain cases, display-mathunderbraces are not quite wide enough. Here's a minimal example:
=================== \starttext
\placeformula\startformula \underbrace{15\,\tf cm}_{L} \stopformula
\stoptext ===================
Using 2013.05.28 00:36 MKIV (from vanilla TL2013), the left brace tip starts under the vertical bar of the "1", instead of enclosing the serif as well. The right brace tip ends between the last two tines of the "m", instead of enclosing the whole "m" and its serifs.
With 2013.04.09 10:38 MKII, the brace tips extend just slightly beyond the "15 cm", which is better. However, they seem slightly too close.
As a test, I ran the comparable plain-TeX file through LuaTeX and PDFTeX.
================== $$ \underbrace{15\,\rm cm}_{L} $$
\bye ==================
The gap between the right brace tip and the text is slightly greater (with either LuaTeX or PDFTeX), and it looks right.
(With the 2012.05.30 MKIV on live.contextgarden.net, the result is similar to the Lua/PDFTeX versions, though not identical, and also looks reasonable.)
it has to do with the fact that we have opentype math fonts now and these are not compatible what you observe is the fact that we have a discrete number of sizes till we run out of them and go stretchable anyhow, i've now defined then in a different way (ok, some more trickery had to be applied as it's one of these aspects of open type math that still inherits old stuff) so in a next version you can do this: \setupmathstackers[vfenced][hoffset=10pt] is it looks like these commands have built-in \limits, these are now set for \overbrace \overparent \overbracket \overbar \underbrace \underparent \underbracket \underbar \doublebrace \doubleparent \doublebracket \doublebar Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
Hans Hagen
what you observe is the fact that we have a discrete number of sizes till we run out of them and go stretchable
That makes sense.
anyhow, i've now defined then in a different way (ok, some more trickery had to be applied as it's one of these aspects of open type math that still inherits old stuff) so in a next version you can do this:
\setupmathstackers[vfenced][hoffset=10pt]
When it's ready to test, I'll try it out and wikify an example. -Sanjoy
Hans Hagen
anyhow, i've now defined then in a different way (ok, some more trickery had to be applied as it's one of these aspects of open type math that still inherits old stuff) so in a next version you can do this:
\setupmathstackers[vfenced][hoffset=10pt]
Tested with 2014.02.14 beta, and it is a big improvement. Again, sorry it took so long to test. If I use hoffset=3pt, it seems that some underbraces get 3-pt borders but others don't. For example, \setupmathstackers[vfenced][hoffset=3pt] \starttext \placeformula\startformula \underbrace{15\,\tf cm}_{L} \times \underbrace{15}_{L} \stopformula \stoptext The second underbrace has the 3-pt borders, but the first one looks more like a 0-pt border (though hoffset=0pt makes it have a negative border). Is it due to quantization, in that the extensibles grow in fixed-size units? -Sanjoy
participants (4)
-
Hans Hagen -
Marco Patzer -
Rudolf Bahr -
Sanjoy Mahajan