[smufl-discuss] Re: Note head height

[dspreadbury]

Laurent wrote:

> I am looking at the SMUFL specifications for font metrics and try to
> understand how it works with the Bravura font. Looking at the font, I
> noticed that the height of note head glyph can vary. For the standard
> whole note head (E0A2), the glyph goes from -136 below the baseline to
> 137 above it. For a half-note head (E0A3), the glyph goes from -145
> below the baseline to 145 above it. How is this supposed to fit a
> staff space? If I understand correctly, the note head is meant to file
> a interline for a staff of 1em, that is 250 with a 1000 upm. I guess
> we also have to take into account the staff line thickness, but I am
> not sure I understand how this is supposed to work and how to deal
> with the height difference.

The idea is that the height difference doesn't matter: the glyphs are
registered such that the centre of the staff line or space on which they
should be positioned corresponds with y=0, i.e. the glyph baseline. So
provided you have your font size set correctly (if you are drawing a staff
height of 20pt, say, then you should set the size of Bravura to 20pt as
well), simply positioning the glyph at the appropriate staff position will
give a correct result, without any specific consideration of the height of
the notehead glyph itself.

Daniel

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