fc904cc1f1
========================================== fixes #6174 Problem ======= The popularity contest heuristic was designed to assume that removing one solver constraint from a redundant group would potentially satisfy it. This means that for sketcher constraints comprising several solver constraints, the sketcher constraint would never be notified as redundant, but always partially redundant (where the case may be that it is redundant or that it is partially redundant). This happens because after removing one solver constraint, it may happen: (a) that no other solver constraint corresponding to the sketcher constraint remains in the redundant group (so it is indeed partially redundant) (b) that at least one other solver constraint corresponding to the sketcher constraint remains in the redundant group (so if all solver constraints remain in the redundant group, the sketcher constraint is actually redundant). This happens because solver constraints of a single sketcher constraint are orthogonal and consequently, a conflict (or redundancy) emanating from removing one of them cannot actually satisfy the group, as it has no effect on the other. Solution ======== When popularity constraint decides on one solver constraint, remove any other solver constraint of the same tag (i.e. same sketcher constraint) that is present in the conflict group (case b). This does not affect case a, because the solver constraint that is not redundant is not present in the conflict (redundancy) group.
Your own 3D parametric modeler
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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 packages for stable releases are available for Windows, macOS and Linux on the Releases page.
On most Linux distributions, FreeCAD is also directly installable from the software center application.
For development releases check the weekly-builds page.
Other options are described at the wiki Download page.
Build Status
| Master | 0.20 | 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.
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