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On 6/2/2017 10:59 AM, Mikael P. Sundqvist wrote:
Hi!
Now that the bug with primes is fixed in ConTeXt, I wonder if there is a way to change the kerning between certain characters in mathematics (in case one is not happy with the output from the font)? After reading in fonts-mkiv.pdf this is what I came up with:
you can also play withj: return { name = "cambria-math", mathematics = { kerns = { [0x1D453] = { force = true, topright = { { kern = 1000, }, }, bottomright = { { kern = 1000, }, }, }, }, }, } currently you need to enable this: \enabledirectives[fontgoodies.mathkerning] keep in mind that some cambria (not all) have such staircase kerns which is why force is needed in order to overload
\startluacode fonts.handlers.otf.addfeature { name = "kerntest", type = "kern", data = { [0x61] = { [0x62] = -150 }, -- a and b in text [0x1d44e] = { [0x1d44f] = -150 }, -- mathematical italic small a and b [0x02032] = { [0x00028] = -150 }, -- prime and left parenthesis } } \stopluacode
\definefontfeature[kerntest][kerntest=yes]
\definefontfamily[lucidaopentype][rm][Lucida Bright OT] \definefontfamily[lucidaopentype][mm][Lucida Bright Math OT]
\setupbodyfont[lucidaopentype,10pt]
\startTEXpage[offset=3pt] abba $abba f'(x)$
\addff{kerntest}
abba $abba f'(x)$
I prefer $f'\mkern-3mu(x)$ \stopTEXpage
The output is attached as a png file. As you see the kerning works as expected in text mode, but not at all in math mode, even not for the a and b (which I hope I entered correctly).
Something like the third line is what I'm after, but not having to use \mkern in all places. Is it possible?
/Mikael
PS: This is a cross post of the question https://tex.stackexchange.com/q/372857/52406, where I got the suggestion to ask on the list.
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