Leedehai
commented
9 months ago Thanks. Admittedly this has been a longstanding pain issue and I do not have an answer.
Boldness and tightness: sorry, this is rooted in Typst's layout strategy and could not be solved cleanly at the package level. Especially, I think the boldness is caused by some issue deep inside the compiler's stretch_glyph() function: stretching by height shouldn't affect the width. I just created https://github.com/typst/typst/issues/2737.
Height of vertical bar: the package uses a hack to calculate the height, and it is not reliable as you saw from the example. Maybe I could use quadratic interpolation to calculate an adjustment factor based on the element height [1], but that's unreliable, too. There's an issue created at Typst (https://github.com/typst/typst/issues/240), and I very much look forward to a native solution to get rid of the hack.
I urge you to raise the Typst contributor's awareness so they could prioritize :)
[1] In the meantime, I'll find some time and do it in this package.
This code snippet
in which the vertical bar is too bold and slightly higher than my braket. Besides, the space between alphabet and bar is too tight.
$ mel(phi_n^0, sqrt((2 hbar) / (m omega))(a^dagger + a), phi_n^0) $gives