Kanji stroke data attribution and modification notice

File: data.js (glyphs field)
Copyright: Ulrich Apel and KanjiVG contributors
Source: KanjiVG r20250816
Commit: bd13ffbcc9d85cb86ae98bbbf001d9069220b901
Upstream: https://kanjivg.tagaini.net/
License: Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
License URL: https://creativecommons.org/licenses/by-sa/3.0/

The 1,026 kanji geometries are adapted from the locally supplied
elementary-kanji-strokes.json, package version 1.0.0.
Source SHA-256:
36a82bc65e0ce1cd4337cdbbcd1da9b4df6c72a73cb0f1db07db2ea52134e228

Changes made by the kakikata project on 2026-09-12:
- Preserve the original stroke order.
- Normalize the 109 by 109 coordinate system to 0...1.
- Sample cubic curves and resample each stroke to 8...160 points.
- Round normalized coordinates to four decimal places.
- Store the results as version 1 point-array JSON.

Browser edition changes on 2026-09-29:
- Embed all geometry unchanged in data.js as globalThis.KANJI_DATA.glyphs.
- Include the existing original grade-specific readings and sentences in
  a separate lessons field, exported from Models/KanjiGrade1...6.swift.
- Render the point arrays as SVG paths for guides and stroke animation.

Intermediate stroke-templates.json SHA-256:
0cdbfde95937f1f568f97a61ff714ffa691d5c0a9b88cdf350d2d16e49d4cfad

The adapted stroke geometry is distributed under CC BY-SA 3.0.
This notice does not apply that license to unrelated site code or the
original example sentences. No upstream endorsement is implied.
The URLs above are attribution references; the site does not fetch them.