cycloidgen v7.5.0

Numbers — none.

Changed

• The application icon is the disc it cuts, not the company logo. Every
  window, task bar button, Start menu entry, installer page, Dock tile and
  desktop launcher showed the Medinstech mark — which says who wrote the
  program and nothing whatever about what it does. Somebody scanning a task bar
  full of windows is looking for this application, and a vendor logo is the
  one thing on it that is also on everything else the vendor ships.

  It is a cycloidal disc now, and not a drawing of one: tools/make_icon.py
  renders the outline through
  disc_profile(),
  the same call the STEP export cuts the part with, with the pin radius taken
  as a fraction of critical_radius() so the lobes are a disc that could
  actually be manufactured rather than a flower. The icon cannot drift from the
  geometry: change the profile and it changes with it. tests/test_icon.py
  measures the committed images back against the equation — every point of the
  outline sits at exactly the pin radius from the pin-centre locus — and against
  what the tool draws today, so a hand-edited PNG fails.

  Each size is drawn at that size. A 256 px disc with eight lobes and six
  output holes resampled to 16 px is grey soup, so it is graded like an
  optical size instead: fewer lobes, deeper, and the holes come out, until at
  16 px it is six lobes and a bore. The .ico carries seven separately drawn
  images and Windows picks between them; the macOS .icns is built the same way
  at package time and now fills every slot up to 1024, where before it stopped
  at 256 and left Finder's largest view to blur one.

  The disc is cut out of a brand-blue tile, which is what lets one asset be
  legible on a light task bar and a dark one — the bare mark was the brand
  colour against whatever the desktop happened to be, and on a dark task bar
  that is 2.8:1.

  The installer's two panels show it too, drawn at the exact 40 px and 96 px
  those controls display rather than scaled down from the 256. The Medinstech
  wordmark stays on the welcome band, where it says who publishes this; the
  picture beside it is now the icon the shortcut will get, which is what
  somebody halfway through a setup wizard is being told about.

  It is not a trademark. cycloidgen.ico and icon-*.png carry no name or
  mark of Medinstech, they are Apache-2.0 with the rest of the source, and a
  fork may keep them — see NOTICE. The brand assets beside
  them are unchanged and still are not. The two generators are kept apart on
  purpose: tools/make_assets.py needs masters that are not in this repository
  and no longer writes the icon, so a brand refresh cannot quietly put the logo
  back.

---

Windows - cycloidgen_..._Setup.exe. It is unsigned, so
SmartScreen will warn on first run: More info -> Run anyway. A
signed build is planned.

Linux - cycloidgen-...-x86_64.AppImage. chmod +x and run it;
it needs glibc 2.35 or newer. If it will not start, the machine has no
FUSE 2: install libfuse2, or run the file with
--appimage-extract-and-run, which unpacks it instead of mounting it.

macOS - cycloidgen-...-arm64.dmg, Apple silicon. Drag it to
Applications, then run this before opening it:

xattr -dr com.apple.quarantine /Applications/cycloidgen.app

It is signed ad-hoc but not notarized, so Gatekeeper blocks the first
launch. On macOS 15 and later the dialog it raises defaults to
Move to Trash, which deletes the install - there is no Open
Anyway in that dialog, it appears in System Settings only after a
launch has been blocked, and right-click -> Open no longer bypasses
it. Clearing the flag first avoids the dialog entirely. On an Intel
Mac, use pip.

Anywhere with Python 3.10-3.14: pip install cycloidgen, then
cycloidgen.

The numbers this produces are preliminary sizing estimates, not a
certification. Validate against a physical prototype before anything
load-bearing depends on them.