On 2014-02-26, 23:13, Wolfgang Schuster wrote:

2. When you apply your “testfeature” to a certain font alternative (e.g. italic) it will work. [...]

Thanks. It's a bit inconvenient, because for each feature you want to apply, you have to define a separate typeface. Is it a bug, or is it intended to be like that? (I understand that this feature may not be needed often. I need it to apply different stretch values to a typeface I'm designing for testing purposes.) Kind regards, Joshua

On 3/1/2014 12:48 PM, Wolfgang Schuster wrote:

Am 28.02.2014 um 20:41 schrieb Joshua Krämer :

...

On 2014-02-26, 23:13, Wolfgang Schuster wrote:

...

2. When you apply your “testfeature” to a certain font alternative (e.g. italic) it will work. [...]

Thanks. It's a bit inconvenient, because for each feature you want to apply, you have to define a separate typeface. Is it a bug, or is it intended to be like that?

This is something only Hans can answer, what I wanted to show you is that the problem isn’t related to the \definefontfamily command.

you can use dynamic features so apply additional ones any moment, but some features line slanting and extending are font instance bound as there the dimensions change and the abckend has to do some work

...

(I understand that this feature may not be needed often. I need it to apply different stretch values to a typeface I'm designing for testing purposes.)

Is there any real purpose for this feature? The letters in the second and third line don’t look beautiful because the horizontal and vertical strokes don’t match.

\definefontfeature [wide] [extend=1.50] \definefontfeature [narrow] [extend=0.75]

\definefontfamily [one] [serif] [Latin Modern Roman] \definefontfamily [two] [serif] [Latin Modern Roman] [features={default,wide}] \definefontfamily [three] [serif] [Latin Modern Roman] [features={default,narrow}]

\definebodyfontenvironment[50pt]

\starttext

\switchtobodyfont[one,50pt]Stretched

\switchtobodyfont[two,50pt]Stretched

\switchtobodyfont[three,50pt]Stretched

\stoptext

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On 2014-03-01, 12:48, Wolfgang Schuster wrote:

Is there any real purpose for this feature? The letters in the second and third line don’t look beautiful because the horizontal and vertical strokes don’t match.

As I said, I'm working on a typeface design. When one tries to optically match an upright and a slanted (italic) font, several factors that influence the apparent (optical) size of the letters have to be considered: the letters of a slanted font with the same vertical x-height as an upright font are bigger along their slant axis, but their counters (inner letter space) are smaller due to the slant. Additionally, the different letter forms play an important role. Very small differences mathematically in slant and letter-width can make a big difference optically. To try out different values, I mathematically stretch and slant the letters by small amounts. Afterwards, of course, when the right values have been found, the letters have to be reworked by hand. Another use-case for the extend feature could be to stretch/compress a line (e.g. a title) to the desired length. If the line is only a little bit too long or too short, compressing or stretching all the letters by for example less than 1% can be enough to add up to the desired amount. Kind regards, Joshua

On 2014-03-05, 15:08, Hans Hagen wrote:

On 3/5/2014 3:19 PM, Joshua Krämer wrote:

...

Another use-case for the extend feature could be to stretch/compress a line (e.g. a title) to the desired length. If the line is only a little bit too long or too short, compressing or stretching all the letters by for example less than 1% can be enough to add up to the desired amount.

that's what hz is doing, but more advanced as it can be set up per character

While hz is an automatic approach, I was thinking about manual interventions, for example when designing a cover page. But DTP applications may be better suited for this usecase. Kind regards, Joshua