On 10/17/2018 6:14 PM, Pablo Rodriguez wrote:
On 10/17/18 11:02 AM, Arthur Reutenauer wrote:
On Tue, Oct 16, 2018 at 07:48:41PM +0200, Pablo Rodriguez wrote:
[...]
It’s less clear what you’re trying to do next:
[...]
What are you trying to demonstrate with this? If you change the size
of the font, obviously the glyphs have different sizes. The initial
size at \starttext is 12pt, then \tfxx and \tfd change the sizes, to 8pt
and 20.736pt respectively. Hence the former looks quite small in the
box, and the latter looks very large. All that’s perfectly normal, and
since you’re not changing the font, or even the glyph, it’s not a good
illustration of the points raised in your initial email.
I tried to show that the em square is the fixed measure. But the glyphs
may relate in different ways to that square.
I know that \tfxx and \tfd are different sizes. But there would be
nothing against taking each of them to develop a new font (at 12 points)
with their diverse glyph sizes.
Or am I missing something.
I don't understand what you issue is. Each font (size) has its own emwidth.
Why design a \tfxx ? Of course, there are fonts with multiple
designsizes but if that is the case then shapes differ (just compare 5pt
7pt 10pt latin modern) but 'develop a new font' is often quite some
effort (esp now that we have unicode fonts).
The issue with units per em is something I didn’t understand.
That’s irrelevant for you as a font user. Don’t worry about it.
A user that asks why different fonts have glyphs with different sizes
given the same point for both, doesn’t remain a font user anymore.
Just explain that it's design side. And compare it to sizing dogs or so
... what do you measure? Its tail or its legs.
(I only wanted to understand, in order to be able to illustrate other
people.)
Hans
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