aprospero f3fe554af7 importSVG - Path generation Overhaul (#20749)
* add precision Parameter for importSVG to preferences

* rewrite svgpath import

reorganize the existing svg interpretation code snippets by dividing the responsibilities for data provision and actual shape generation.
That bears the opportunity to optimize the resulting construction data regarding consistency and precision.

* create cuts from inner paths

organize paths in a tree structure where completely contained paths are children of their sorrounding paths

In a second step the even depth paths are cut with their respective (uneven depth) children.

* move svg path import logic into its own module

* Restructure how the import result is controlled by preferences.

* reintroduce alternative transform function

Using transformGeometry() on shapes results in degenerations like lines mutating to bsplines of 1st order. For non-orthogonal Transformations this can't be avoided. But for orthogonal transformations (the majority) we can apply those transformations without degeneration.

The necessary function including fallback to transformGeometry() is already in the code but was disabled due to a regression.

See: https://tracker.freecad.org/view.php?id=2062

Associated commits: f045df1e 2509e59b d4f3cb72

I reactivate the code since the degeneration of paths seems a bigger issue to me than misformed svg files producing incorrect measurements. Degenrated paths are often the culprit for later arising 3D-calculation errors.

* avoid path degeneration by keeping scale transformations uniform

* repair style application on shapes

the style should be based on the configured svgstyle mode in the svgimport preferences.

* improve logging of face generation.

* refactor: rename _precision_step to _tolerance

naming according to example set in draft utils.

* fix: indentation

* spelling
2025-04-25 16:44:03 +02:00
2025-04-24 21:07:08 -05:00
2025-02-22 17:37:24 +01:00
2023-02-13 15:46:28 +01:00
2024-07-14 09:24:22 +02:00
2025-02-21 08:06:16 +01:00

Your own 3D parametric modeler

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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 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 mode and 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

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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.

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