AmstelvarA2

Alpha version of Amstelvar with avar2 data. (work in progress)

Folder structure

AmstelvarA2
├── Fonts/
├── Proofs/
├── Sources/
├── Tools/
├── OFL.txt
├── README.md
└── build.sh

Fonts

font binaries for testing

Proofs

proofs of the variable fonts

Sources

various source files used to design and build the variable fonts

Tools

scripts used during production

build.sh

shell script to build Roman & Italic variable fonts from their source files

Fonts

Fonts
├── legacy/
├── AmstelvarA2-Roman_avar2.ttf
└── AmstelvarA2-Italic_avar2.ttf

legacy

Subfolder containing the original avar1 version of Amstelvar for use in proofs.

AmstelvarA2-Roman_avar2.ttf, AmstelvarA2-Italic_avar2.ttf

Roman and Italic variable fonts in avar2 format

Proofs

Proofs
├── HTML/
├── PDF/
└── fontra-test-strings.txt

HTML

Interactive proofs in HTML/CSS/JS format.

PDF

Static proofs in PDF format.

fontra-test-strings.txt

Test text strings for previewing glyph sets in Fontra.

Sources

This folder contains two subfolders with separate files for Roman and Italic, and project-level files which are used by both styles.

Sources
├── Italic/
├── Roman/
└── AmstelvarA2.roboFontSets

Roman (+ same structure for Italic)

Roman
├── *.ufo
├── measurements.json
├── blends.json
├── features/*.fea
├── AmstelvarA2-Roman.glyphConstruction
├── AmstelvarA2-Roman.roboFontSets
└── AmstelvarA2-Roman_avar2.designspace

*.ufo

Font sources in UFO format, with files named according to their variation parameters.

measurements.json

Standalone JSON file containing definitions for various font- and glyph-level measurements.
Created using the Measurements tool from the VariableValues RoboFont extension.
See Measurements format for documentation of the data format.

blends.json

Standalone JSON file containing definitions of blended axes and blended sources from parametric axes.
Used when building the avar2 designspace.

features

Subfolder with .fea files containing OpenType feature code used by the source fonts.

AmstelvarA2-Roman.glyphConstruction

GlyphConstruction file containing instructions for building glyphs from components.

AmstelvarA2-Roman.roboFontSets

SmartSets file containing various sets of glyphs.

AmstelvarA2-Roman_avar2.designspace

Designspace for building the avar2 variable font.

Tools

Tools
├── blending/
├── production/
├── proofing/
└── build-designspace.py

Production scripts

A subfolder containing various scripts used during development. The most relevant ones are listed below.

set-names-from-measurements.py

Set file name and style name from measurements in all UFOs in a given folder.
Includes a preflight mode which only prints the new names without changing the files.

copy-glyphs.py

Copy glyphs from the default font to selected sources.

build-glyphs.py

Build glyphs from glyph constructions in the selected sources.

validate-locations.py

Check if source locations are within the allowed min/max bounds for each axis.
Helpful when debugging calculated blend values in relation to the current parametric axes.

mark-components.py

Mark glyphs in the current font containing components with different colors depending on their components' nesting level.

Blending

The appropriate values for blending opsz wght wdth from parametric axes are produced on a separate repository which is a fork of the original Amstelvar source. [The naming of UFO files was adjusted for easier parameter parsing (using underscores to separate parameters instead of hyphens), and all unnecessary files were deleted.]

A separate measurements file was added for Amstelvar, with the same parameters used for measuring AmstelvarA2. This file is needed because the contour structures of the two versions are different, and in most measurements different point indexes must be used.

Extracting measurements

Using this separate measurements file, the original Amstelvar sources are then measured to produce the blends.json file which is used by the AmstelvarA2 designspace builder.

Variation axes in AmstelvarA2

Typographic axes

1. opsz Optical size
2. wght Weight
3. wdth Width
4. XTSP Proportional spacing

Parametric axes

1. WDSP Word space width
2. GRAD
3. XOUC X stem uppercase
4. YOUC Y stem uppercase
5. XTUC X transparent uppercase
6. XTUR X transparent uppercase rounds
7. XTUD X transparent uppercase diagonals
8. XTUA Uppercase accent width
9. YTUC Y transparent uppercase
10. XSHU X horizontal serif uppercase
11. YSHU Y horizontal serif uppercase
12. XSVU X vertical serif uppercase
13. YSVU Y vertical serif uppercase
14. XVAU Uppercase vertical serif angle
15. YHAU Uppercase horizontal serif angle
16. XQUC X internal curvature uppercase
17. YQUC Y internal curvature uppercase
18. XUCS X sidebearing uppercase straights
19. XUCR X sidebearing uppercase rounds
20. XUCD X sidebearing uppercase diagonals
21. XOLC X stem lowercase
22. YOLC Y stem lowercase
23. XTLC X transparent lowercase
24. XTLR X transparent lowercase rounds
25. XTLD X transparent lowercase diagonals
26. XTLA Lowercase accent width
27. YTLC Y transparent lowercase
28. YTAS Y transparent ascender
29. YTDE Y transparent descender
30. XSHL X horizontal serif lowercase
31. YSHL Y horizontal serif lowercase
32. XSVL X vertical serif lowercase
33. YSVL Y vertical serif lowercase
34. XVAL Lowercase vertical serif angle
35. YHAL Lowercase horizontal serif angle
36. XLCS X sidebearing lowercase straights
37. XLCR X sidebearing lowercase rounds
38. XLCD X sidebearing lowercase diagonals
39. XQLC X internal curvature lowercase
40. YQLC Y internal curvature lowercase
41. XOFI X stem figures
42. YOFI Y stem figures
43. XTFI X transparent figures
44. YTFI Y transparent figures
45. XSHF X horizontal serif figures
46. YSHF Y horizontal serif figures
47. XSVF X vertical serif figures
48. YSVF Y vertical serif figures
49. XVAF Figures vertical serif angle
50. YHAF Figures horizontal serif angle
51. XQFI X internal curvature figures
52. YQFI Y internal curvature figures
53. XFIR X sidebearing figure 0
54. XDOT Dot width
55. YTOS General y overshoot
56. XTTW Trap width
57. YTTL Trap length
58. BARS