JT Form Change v1.0.0
Add-in for Autodesk Fusion / J techno Inc.

Overview
--------
JT Form Change converts selected trimmed BRep faces (a single face or a
multi-face region) into a quad-only mesh, then continues automatically
through Fusion's "Convert Mesh (Organic)" and Form conversion so the result
is available as an editable T-spline body. The add-in stops with the Form
environment open, ready for editing; press "Finish Form" to commit.

Supported geometry
------------------
- 3-, 4-, 5+ sided N-gon regions, concave shapes (L / U), rounded perimeters
- Single faces use the exact face UV parameter space when usable
- Multi-face regions are laid out via a harmonic map of the welded,
  T-junction-repaired combined tessellation
- Holes (inner loops) are filled for projection; quad patches target the
  outer perimeter
- Sharp creases over 20 degrees (dihedral angle) are processed separately
  from smooth face groups

Basic workflow
--------------
1. Select one or more trimmed faces to convert, then run the command.
2. Before conversion, the outer boundary is inspected for pronounced necks
   (dumbbell shapes) that are unsuitable for a single T-spline.
3. If a neck is detected, candidate split lines are shown and you choose:
   - Yes: split the region at the neck(s) and pick which part(s) to convert
   - No: convert the whole selected region as one component
   - Cancel: exit without changing the model
4. Multi-level necks are split recursively; the resulting regions are shown
   color-coded. Enter numbers to select parts (e.g. 1 / 1,3 / 1-3 / all).
5. After the quad mesh is generated, the add-in automatically continues
   through Convert Mesh (Organic) and Form conversion, then stops with the
   Form environment open.

First-run note
--------------
Fusion remembers the "Convert Mesh" settings inside its native dialog. On
the first run only, the dialog stays open; set
  Method = Organic / Accuracy = Highest
and press OK. Subsequent runs proceed automatically.
"Highest" accuracy is recommended (boundary tracking is exact).

Installation
------------
Supported OS: Windows only (no Mac version is provided).
1. Copy the JTFormChange folder into your Fusion AddIns folder:
   Windows: %APPDATA%\Autodesk\Autodesk Fusion\API\AddIns
   (The bundled install_windows.cmd script does the same.)
2. Restart Fusion, or run JTFormChange from
   Utilities > Scripts and Add-Ins.

License (subscription)
----------------------
This product is licensed on a subscription basis.
Pricing: US$299/year (JPY 49,900 tax incl.) or US$29.90/month (JPY 4,990 tax incl.)

Free trial: a 3-day free trial (full functionality, no license file needed)
starts on first run after installation. Please verify operation during the
trial. Because a free trial is provided, purchases are non-refundable.

1. Purchase: payment is handled as a PayPal subscription.
   Purchase page: https://j-techno.biz/ (via the product page)
2. On first run the add-in displays your "Machine ID". Send it, together
   with the name used for the purchase, to the support contact below.
3. We will issue a license file (license.json) bound to your PC. Save it to:
   Windows: %APPDATA%\JTFormChange\license.json
4. The license file carries an expiry date matching your subscription
   period. While your subscription is active, renewed license files are
   provided. If the subscription is cancelled, the add-in stops running
   after the expiry date.

- The license is bound to the issued PC (Machine ID). Contact us for
  reissue when you replace your machine.
- Copying, sharing, or redistributing the license file is prohibited
  (see EULA).

Support
-------
J techno Inc.
Web: https://j-techno.biz/
E-mail: support@j-techno.biz

Known notes
-----------
- Use "Highest" accuracy for the organic BRep conversion. With "High",
  boundary edges may deviate slightly.
- For multi-region results (neck splits), seams between regions can be
  welded inside Form via Modify > Merge Edge.
- Final verification of generated geometry and all design/manufacturing
  decisions are the user's responsibility.
- A detailed log is written to the OS temp folder (please attach it to
  bug reports).
