bffb82d531
================================================================ Master has a problem in that internal alignment constraints are suggested to the user for removal. This is fundamentally wrong, as an internal alignment constraint are an inherent part of the geometry. They cannot be the ones suggested for removal. The popularity contest algorithm is an heuristic algorithm that determines which redundant/conflicting constraints should be proposed for removal. Basically, the algorithm works on groups of redundant/conflicting constraints detected via the QR decomposition. A constraint may belong to more than one group. The algorithm runs some heuristics, each constraint scoring a value, the one constraint from each group scoring the highest is proposed (is more popular and wins the contest). This PR documents the algorithm, and adds a further condition, that internal alignment constraints are never proposed. As the solver works with solver constraints as opposed to the sketcher, which works with sketcher constraints, information about whether a solver constraint originated from a sketcher constraint that is internal alignment is necessary. So the solver constraint is extended to accomodate this piece of information. As a bonus, it fixes a bug. Solver constraints carry information of the ID of the corresponding sketcher constraint in their tag. Knots are not currently implemented as constraints. However, the tag index was not being update. This caused the popularity contest to provide wrong suggestions despite good detection.
Your own 3D parametric modeler
Website • Documentation • Forum • Bug tracker • Git repository
Overview
-
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.
-
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.
-
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.
-
Cross platform FreeCAD runs on Windows, macOS and Linux operating systems.
-
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 |
|---|---|---|
|
 |
|
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.
This project receives generous infrastructure support from
and KiCad Services Corp.