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by pony_sheared 1995 days ago
Sorry to horrify anyone but we actually do this at work (mechanical engineering company) - JavaScript calculated component dimensions as form fields based on user input (e.g. pressure or load rating) overlaid on technical drawings.

Reason it's done in pdf is a lot of our technical is spat out in PDF format (generated from CAD - SolidWorks).

There are other options like Traceparts or setting up a variable input SolidWorks model to generate loads of static outputs, if you have the time and money.