CAD files in Gitea + View the CAD files


#1

Dear Gitea folks,
I am working on a way to manage CAD files (think STEP, IGES …) in Gitea. Obviously, displaying the contents of CAD files as text is not interesting, we need 2 things:

  • a 3D viewer (three.js or x3dom)
  • a way to convert CAD files to a format that can be used by the viewer.

I already have the viewer and the code to convert from CAD to JSON or X3D, and made some code and template modifications to display the viewer when a project file is identified as a CAD file so this is not a problem.
The only thing I miss is an understanding of how to trigger a (Python) procedure just after a repo is pushed to Gitea.
Any help, link to docs, recommendation, suggestion will be happily welcome.
Thx


#2

Sounds like you want a CI/CD workflow to publish a static site based off git source and automatically deploy it.

Here’s what I’d do:

  1. Create a Hugo custom output type to generate the files by acceptable MIME type
  2. Make a layout to first display the CAD files using library of choice (canvas render optimal)
  3. Stand up a Drone server to trigger builds based on webhook from Gitea
  4. Add a build config to pull data from CAD repo
  5. Trigger a Hugo build to display your custom output format in your layout
  6. And deploy your updated site

That’s just a rough sketch. TL;DR is you probably want a CI/CD workflow triggered by a webhook upon commit. Use Hugo because it’s the fastest way to iterate on a website.

If you’re looking for a Hugo base theme please consider saving time with https://after-dark.habd.as it’s extendible for your needs assuming my suggested approach is viable.


#3

Not sure I explained it properly …
I add and commit CAD files (STEP, IGES, FCStd …) to my repo. Then I push everything. If I use the standard Gitea, what I will see via the web interface is text or a direct download possibility. What I want is a 3D view (three.js or x3dom). So I need to convert my CAD files to a format three.js/x3dom understands: STL or JSON for example (in routers/repo/view.go, I call a Python routine that uses PythonOCC to do the conversion) and modify the templates/repo.view_file.tmpl template to use the converted data when rendering a CAD file.
I tried the hook way but converting the whole git database is hard ! The other way is to convert ‘on-the-fly’: upon a request for a CAD file, I run the conversion server-side and use the converted file to build the 3D display.