blendercam/scripts/addons/docs/style.md

Style Guide

As a Blender extension, Fabex follows the guidelines laid out by the Blender Foundation:

Blender Code Best Practices

Extension Guidelines

In short, Blender uses a modified version of the pep8 standard, meaning:

• Classes are NamedLikeThis - no spaces, all words capitalized
• Functions, modules, variables, etc are named_like_this - spaces replaced with underscores, no capital letters
• No * imports - e.g. from module import * should be rewritten to specify exactly what is being imported - from module import Class, function, variable as other_name etc.

Fabex extends the default line-length to 100 to allow some of the longer equations to remain on a single line.

An auto-formatter, Black, has been implemented to ensure code consistency across contributions. It will ensure that your spacing, indentation etc are in line with the project guidelines.

Most Code Editors/IDEs are able to integrate the Black formatter, so you can format your code while you work.

Project Structure

Fabex is a huge addon, with many different functions, added by many different contributors over the course of 12 years of development!

In order to avoid conflicts, bugs and import errors a hierarchy has been established:

• First, utilities are at the lowest level - they depend on external libraries (e.g.: bpy, shapely, numpy etc) and are used to power the other classes and functions
• Second, are all the files in the main addon folder (e.g.: cam_chunk, gcode_path, strategy) and they use external libraries, as well as utilities to power Blender's functions
• Third, properties, operators and ui are Blender classes that use utilites and the main files to integrate Fabex functions into Blender

The rest of the files can be considered references:

• post_processors and presets will be loaded based on user selections in Blender
• tests contains automated testing functions related to Github Workflows (see the Testing page for more details)
• wheels conatins the pre-built Python binaries that power the external dependencies shapely and opencamlib - they are loaded automatically by Blender