5086c5f38d
======================================================== Users chennes and hyarion made me aware of this covereity issue: Fixes Coverity: geoit can be end() when dereferenced https://github.com/FreeCAD/FreeCAD/pull/4429/files# When analysing the block where the dereferrencing appears, it appears that it is a left-over that no longer makes sense: - The algorithm classifies block constraints into those that are not affected by any other driving constraint and those that are affected by other driving constraints. - The offending block deals with internal aligned geometry, thus per definition has a driving internal alignment constraint, for which the previous block already set the need of post-analysis. - No matter what, the geometries, the complex one and the internal one will have at least the driving internal alignment constraint, so they cannot become "not affected by any other driving constraint". - If the geometry had a block constraint on it, it was already added for post-analysis in the previous block. If it did not have one block constraint, the fact that it is internal aligned geometry is an irrelevant consideration. Probably there was a point during development when this made sense, but with the current post-analysis, it does not appear to make sense anymore. So the block was removed. This commit adds a unit test for blocked geometry (new block constraint).
Your own 3D parametric modeler
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This project receives generous infrastructure support from
Overview
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Freedom to build what you want FreeCAD is an open-source parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history to change its parameters.
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Create 3D from 2D and back FreeCAD lets you to sketch geometry constrained 2D shapes and use them as a base to build other objects. It contains many components to adjust dimensions or extract design details from 3D models to create high quality production-ready drawings.
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Designed for your needs FreeCAD is designed to fit a wide range of uses including product design, mechanical engineering and architecture, whether you are a hobbyist, programmer, experienced CAD user, student or teacher.
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Cross platform FreeCAD runs on Windows, macOS and Linux operating systems.
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Underlying technology
- OpenCASCADE A powerful geometry kernel, the most important component of FreeCAD
- Coin3D library Open Inventor-compliant 3D scene representation model
- Python FreeCAD offers a broad Python API
- Qt Graphical user interface built with Qt
Installing
Precompiled (installable) packages are available for Windows and macOS on the Releases page.
On most Linux distributions, FreeCAD is directly installable from the software center application.
Other options are described at the wiki Download page.
Build Status 
| Master | 0.18 | Translation |
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Compiling
Compiling FreeCAD requires installation of several libraries and their development files such as OCCT (Open Cascade), Coin and Qt, listed in the pages below. Once this is done, FreeCAD can be compiled with CMake. On Windows, these libraries are bundled and offered by the FreeCAD team in a convenient package. On Linux, they are usually found in your distribution's repositories, and on macOS and other platforms, you will usually have to compile them yourself.
The pages below contain up-to-date build instructions:
Reporting Issues
To report an issue please:
- First post to forum to verify the issue;
- Link forum thread to bug tracker ticket and vice-a-versa;
- Use the most updated stable or development versions of FreeCAD;
- Post version info from eg.
Help > About FreeCAD > Copy to clipboard; - Post a Step-By-Step explanation on how to recreate the issue;
- Upload an example file to demonstrate problem.
For more detail see:
Usage & Getting help
The FreeCAD wiki contains documentation on general FreeCAD usage, Python scripting, and development. These pages might help you get started:
The FreeCAD forum is also a great place to find help and solve specific problems you might encounter when learning to use FreeCAD.