Some more Legacy Computing Symbols (pt 6)

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Preview

Stripes 𜲀𜲁𜲂𜲃𜲄𜲅 𜱀𜱁𜱂𜱃𜱄𜱅 𜱁𜱁

Other shapes: 𜱼𜱽𜱾𜱿 ⬝🞔𜸅🞑𜸃𜸄 🯠🯢🯡🯣🯨🯪🯩🯫🯬🯭🯮🯯𜸀𜸁 𜸋𜸌 ␧␨␩𜹩

Rotated Stickman (compared with pointing hand): ☜☝☞☟ 🯅𜰂𜰃𜰄

Circle Segment

𜰰𜰱𜰲𜰳
𜰴𜰵𜰶𜰷 𜰵⎺𜰶
𜰸𜰹𜰺𜰻 ⎸𜱪⎹
𜰼𜰽𜰾𜰿 𜰹⎽𜰺

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Part of #2189

Covered Ranges:

• U+1CC40 - U+1CC45 (line-shaded blocks)
  • Implemented assuming the individual lines are actual strokes instead of the fill thing in the existing shades.
    • The diagonal fills are set so that they would be have the same stroke width as the orthogonal line fills.
  • All the NWID glyphs are equivalent to half of the WWID glyphs so that the pattern does not change between width variants. This is consistent with the existing shades.
  • Note that I doubled the density of the shades compared to the Unicode reference. Otherwise following the above the "sparse vertical fill" will just become a single line.
• U+1CC80 - U+1CC83 (striped triangles)
• U+1CC84 - U+1CC85 (ladders)
  • Both reuse the horizontal/vertical shade functions.
  • The stripes for the triangles are adjusted so that the shape will still be discernable and visually consistent across weights.
• U+1CE00 - U+1CE01, U+1FBE0 - U+1FBE3, U+1FBE8 - U+1FBEF (split circles)
• U+1CE0B - U+1CE0C (split ellipse)
• U+1CE03 - U+1CE05 (heavy white square derivatives)
  • Implemented according to their names, ignoring any difference from the reference for now.
• U+2427 - U+2428 (delete symbol checkers)
  • Extended the MosaicPattern function to allow a custom boundary. Hopefully this doesn't break the old glyphs again.
• U+1CC7C - U+1CC7F (square spirals)
  • Involves "moving" a reference point along a spiral so I just used set here (the alternative is to hard-code).

Bigger changes involving some messy code:

• U+1CC02 - U+1CC04 (rotated stickman)
  • Tried to make a general function/process to generate characters with several orientiations (generalized from ☜☝☞☟):
    • A shortcut D4Transform function for the simple 90/180deg rotations and reflections along the center
    • A WithD4Transform which is a with-transform + D4Transform, which is needed because of italics. I might have just reinvented PointingTo here though.
    • A SidewaysBox function that returns a Box that, when rotated 90deg, should preserve the left-right bound AND the aspect ratio of the original bound (but rotated).
  • For the glyphs themselves, it does seem that using this general method would make the horizontal stickmen very small in NWID, so maybe some alternative is needed.
• U+1CC30 - U+1CC3F (quarter/twelfth circles)
  • Tried to make a general function/process to generate split characters (generalized from 🯁🯂🯃):
    • A SplitGraphic function that creates a large graphic from a given shape function and splits them accordingly.
  • Because of how with-transform works (?), an upright split-graphic needs to include ForceUpright again.
    • Vertically-split glyphs are unlikely to be compatible with italic anyway, though the existing horizontally-split ones can be italicized.
  • For the glyphs themselves, they are only in MOSC form (i.e. stretched to the cell) because a "twelfth circle" with an unstretched circle is mathematically impossible in NWID.
    • While not needed, they are aligned with the border box lines ⎺⎸⎹⎽

Other:

• Modified the shaded.ptl to put the (potentially) shared variables outside. Nothing is actually changed but these are leftovers from when I thought of implementing the shaded block glyphs in that file.
• Moved and reimplemented the 2x2 mosaics in teletext.ptl.