346be29042
* Change Address the poor performance of the existing unique-name generation As described in Issue 16849, the existing Tools::getUniqueName method requires calling code to form a vector of existing names to be avoided. This leads to poor performance both in the O(n) cost of building such a vector and also getUniqueName's O(n) algorithm for actually generating the unique name (where 'n' is the number of pre-existing names). This has particularly noticeable cost in documents with large numbers of DocumentObjects because generating both Names and Labels for each new object incurs this cost. During an operation such as importing this results in an O(n^2) time spent generating names. The other major cost is in the saving of the temporary backup file, which uses name generation for the "files" embedded in the Zip file. Documents can easily need several such "files" for each object in the document. This is the first part of the correction, adding an efficient class for managing sets of unique names. New class UniqueNameManager keeps a list of existing names organized in a manner that eases unique-name generation. This class essentially acts as a set of names, with the ability to add and remove names and check if a name is already there, with the added ability to take a prototype name and generate a unique form for it which is not already in the set. a new unit test for UniqueNameManager has been added as well. There is a small regression, compared to the existing unique-name code, insofar as passing a prototype name like "xyz1234" to the old code would yield "xyz1235" whether or not "xyz1234" already existed, while the new code will return the next name above the currently-highest name on the "xyz" model, which could be "xyz" or "xyz1" or "xyz0042"..
Your own 3D parametric modeler
Website • Documentation • Forum • Bug tracker • Git repository • Blog
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 visit the weekly-builds page.
Other options are described on the wiki Download page.
Compiling
FreeCAD requires several dependencies to correctly compile for development and production builds. The following pages contain updated build instructions for their respective platforms:
Reporting Issues
To report an issue please:
- Consider posting to the Forum, Discord channel, or Reddit to verify the issue;
- Search the existing issues for potential duplicates;
- Use the most updated stable or development versions of FreeCAD;
- Post version info from
Help > About FreeCAD > Copy to clipboard; - Restart FreeCAD in safe mode
Help > Restart in safe modeand try to reproduce the issue again. If the issue is resolved it can be fixed by deleting the FreeCAD config files. - Start recording a macro
Macro > Macro recording...and repeat all steps. Stop recording after the issue occurs and upload the saved macro or copy the macro code in the issue; - Post a Step-By-Step explanation on how to recreate the issue;
- Upload an example file (FCStd as ZIP file) to demonstrate the problem;
For more details see:
Note
The FPA offers developers the opportunity to apply for a grant to work on projects of their choosing. Check jobs and funding to know more.
Usage & Getting Help
The FreeCAD wiki contains documentation on general FreeCAD usage, Python scripting, and development. View these pages for more information:
The FreeCAD forum is a great place to find help and solve specific problems when learning to use FreeCAD.
This project receives generous infrastructure support from
and KiCad Services Corp.