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raphlinus's profile
Raph Levien
Raph Levien
Raph Levien
@raphlinus

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Raph Levien

@raphlinus

Rust. Fonts. Graphics. Quaker. Independent. he/him

Berkeley, CA
levien.com
Joined May 2009

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    1. L T T R R R @home‏ @letterror 3 Aug 2019
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      Replying to @NickSherman @kioskfonts and

      In an 8 master, 3 axes system, if a non-aligned off-axis location is assigned as the new default, the generator than has to create a lot more masters to “keep the tent up” (@djrrb’s metaphor). 1/2pic.twitter.com/USY1c9t80a

      2 replies 0 retweets 14 likes
    2. Arrow Type‏ @ArrowType 3 Aug 2019
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      Replying to @letterror @NickSherman and

      Great sketches! Very helpful. But ... I'm still a bit confused why it wouldn't work to just add the single, calculated master. If the 8 corners can "keep the tent up" already, why would an intepolated source disrupt that? I may just need to test it to see why

      1 reply 0 retweets 0 likes
    3. L T T R R R @home‏ @letterror 3 Aug 2019
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      Replying to @ArrowType @NickSherman and

      If you want that interpolated source to be the default, with current technology and math, that master needs to be on the default of all axes. Hence lots of masters to reconstruct those. But maybe I'm not understanding your question..

      2 replies 0 retweets 1 like
    4. Arrow Type‏ @ArrowType 3 Aug 2019
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      Replying to @letterror @NickSherman and

      I think you understood my question, and I appreciate the added explaination. It is still hard for me to get *why* the default must be on all the axes in the first place. But, I probably just need to look at how the gvar table relates to the glyf table.

      1 reply 0 retweets 0 likes
    5. Frank Grießhammer‏ @kioskfonts 3 Aug 2019
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      Replying to @ArrowType @letterror and

      Attempt: the default master is the only “font” that is stored in the VF as actual, old-school outlines. Everything else is stored in the VF as deltas from the points of those default outlines.

      1 reply 0 retweets 4 likes
    6. Arrow Type‏ @ArrowType 3 Aug 2019
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      Replying to @kioskfonts @letterror and

      Thanks – I do understand that it is a current limitation, but I'm just not sure why/whether it is a hard mathematical limitation. If a designspace works for a given area, why would pre-calculating one location in that area require pre-calculating any others?pic.twitter.com/O8bsa49nmy

      1 reply 0 retweets 1 like
    7. Arrow Type‏ @ArrowType 3 Aug 2019
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      Replying to @ArrowType @kioskfonts and

      My thinking: In a future OpenType spec, maybe there could be a "default" location in the gvar table, and other deltas would be relative to that. However, the glyf table outlines would be pre-calculated to load first / load in legacy software.

      1 reply 0 retweets 0 likes
    8. Arrow Type‏ @ArrowType 3 Aug 2019
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      Replying to @ArrowType @kioskfonts and

      So, a better illustration of that would be this:pic.twitter.com/69LQW5IkFS

      1 reply 0 retweets 3 likes
    9. Dave Crossland‏ @davelab6 3 Aug 2019
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      Replying to @ArrowType @kioskfonts and

      Definitely believe v1.8 has issues here

      1 reply 0 retweets 1 like
    10. Raph Levien‏ @raphlinus 3 Aug 2019
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      Replying to @davelab6 @ArrowType and

      We can (re-)define the basis functions so they're zero at the default setting. Then you can change the default freely. This is one part of a proposal I have to improve interpolation, which I will publish shortly.

      1 reply 0 retweets 5 likes
      Raph Levien‏ @raphlinus 3 Aug 2019
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      Replying to @raphlinus @davelab6 and

      And by shortly I mean now :)https://github.com/OpenType/opentype-variations/issues/7 …

      1:26 PM - 3 Aug 2019
      • 2 Retweets
      • 10 Likes
      • Maxim Leyzerovich Rob Just van Rossum Behdad Esfahbod Rasmus Andersson Arrow Type Eli Heuer Dave Crossland David Jonathan Ross
      1 reply 2 retweets 10 likes
        1. Dave Crossland‏ @davelab6 3 Aug 2019
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          Replying to @raphlinus @ArrowType and

          😂

          0 replies 0 retweets 0 likes
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