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Technical guide

Technical information for contributors: architecture, tools and processes.

FreeCAD developers tool set

C++ and Python
Qt: a cross platform development framework
OpenCascade: a geometry library
Coin3d: a scenegraph manager based on OpenInventor that handles drawing in the 3d window.
Pivy: a Python binding for Coin3d

Modifying FreeCAD

The process for submitting changes to FreeCAD is described in the CONTRIBUTING file in the root of the source tree.
Creating a WorkBench
The PowerUser’s hub in the FreeCAD wiki contains good information about Python scripting and workbench creation

See Also

Application Module

Overview of application module structure.

Automated Testing

Automated Testing.

Building release packages

How to build FreeCAD packages for the different supported platforms.

Code for Translation

How to write code with strings that should be translated.

Code signing

Signing the FreeCAD executables and installers.

Developer's Glossary

Some terms that a developer may run across.

Feature checklist

Checklist for adding a new feature to an existing workbench in C++.

Major Releases

Guide for Major Releases.

Minor Releases

Guide for Minor Releases.

Object deletion

How to control object deletion.

Preferences

How to handle, retrieve and update user preferences.

Property Changes

Dealing with Property Changes. A brief introduction.