Engineering drawing

An engineering drawing is a DOCUMENT derived from a part. cad.eng_drawing projects views from the part's geometry, places dimensions between points ON that geometry, finds centre marks on it, and lays the result out on an ISO sheet with a frame and a title block. Change the model, rerun the drawing script, and the views, hidden lines and measured values move with it. Nothing on the sheet is drawn by hand, and nothing on it is a number you typed unless you chose to override a value.

The output is one PDF. That is what a shop receives and what every operating system opens. No DXF is written, nothing is paired or linked, and there is no CLI: the script is the interface. Cut layouts and flat patterns are toolpaths, not documents, and a different job.

Setup

Run the cad command (~/.local/bin/cad where it is not on your PATH; cad.exe on Windows). If it is missing, install text-to-cad, outside a sandbox or with its permission: