Draft SVG: Difference between revisions

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<languages/>
{{GuiCommand|Name=Draft_SVG|Workbenches=[[Draft Module|Draft]]|MenuLocation=Draft -> Open/Import}}
<translate>


<!--T:16-->
[[Image:Screenshot inkscape.jpg]]
{{Docnav
|[[Draft_DXF|Autodesk .DXF .DWG]]
|[[Draft_OCA|Open Cad format .OCA]]
|[[Draft_Module|Draft]]
|IconL=
|IconR=
|IconC=Workbench_Draft.svg
}}


</translate>
====Opening====
{{TOCright}}
<translate>


==Description== <!--T:11-->
This function imports SVG files as workable 2D objects, in opposition to the built-in drawing module which imports svg files as sheet drawings.
The following SVG objects get imported at the moment:


<!--T:20-->
* PATH objects with M, C, L or A commands
Draft SVG is a software module used by the [[File:Std_Open.svg|24px]] [[Std_Open|Std Open]], [[File:Std_Import.svg|24px]] [[Std_Import|Std Import]] and [[File:Std_Export.svg|24px]] [[Std_Export|Std Export]] commands to handle the [[SVG]] file format.
* RECT objects


</translate>
====Importing====
[[Image:Screenshot inkscape.jpg]]
<translate>
<!--T:12-->
{{Caption|Inkscape drawing exported to SVG, which is subsequently opened in FreeCAD}}


==Importing== <!--T:2-->
Works the same way as opening but creates the objects in the active document instead of creating anew one.


<!--T:21-->
====Exporting====
The following SVG objects can be imported:
* PATH objects
* LINE objects
* RECT objects
* CIRCLE objects
* ELLIPSE objects
* POLYGON objects
* POLYLINE objects


===Limitations=== <!--T:22-->
The following objects can be exported in an SVG file:


<!--T:23-->
FreeCAD will not import path objects that have only one point ([https://forum.freecadweb.org/viewtopic.php?f=3&t=43856 forum discussion]).

==Exporting== <!--T:4-->

<!--T:24-->
The following FreeCAD objects can be exported:
* Lines and wires (polylines)
* Lines and wires (polylines)
* Arcs and circles
* Arcs and circles
* Faces
* Faces
* Texts
* Texts
* Dimensions

===Limitations=== <!--T:5-->

<!--T:25-->
SVG is a 2D format, so all Z information will be disregarded (all objects will be flattened).

==Unit Handling== <!--T:7-->

<!--T:26-->
When exporting, a User Unit (px) equals one millimeter.

<!--T:8-->
When importing, the width, height and viewBox attributes are respected. All elements are scaled to their size in millimeters, which is FreeCAD's internal unit. If the SVG does not contain information on its physical size, it is assumed to have a 90 DPI resolution.
Using absolute units in attributes inside the SVG should be avoided. Relative units like em, ex and % are currently not supported.

<!--T:9-->
The [https://inkscape.org/ Inkscape] SVG Editor currently works only with 90 DPI documents. No matter which unit is selected in Inkscape. All the output has to be considered converted to 90 DPI and rounded to 6 decimal places. As FreeCAD (and the SVG standard) is agnostic to the precision of rounding done in Inkscape these values will not be rounded on input. And odd values in millimeter will remain.
If you need the SVG import not to be rounded, work on User Units (px) in Inkscape. Scaling can be done after the import in FreeCAD or by changing the width, height and viewbox attributes.

==Preferences== <!--T:6-->

<!--T:27-->
See [[Import_Export_Preferences|Import Export Preferences]].

==Scripting== <!--T:13-->

<!--T:28-->
See also: [https://freecad.github.io/SourceDoc/ Autogenerated API documentation] and [[FreeCAD Scripting Basics|FreeCAD Scripting Basics]].

<!--T:14-->
To export objects to SVG use the {{incode|export}} method of the importSVG module.

</translate>
{{Code|code=
importSVG.export(exportList, filename)
}}
<translate>

<!--T:29-->
* For the Windows OS: use a {{FileName|/}} (forward slash) as the path separator in {{Incode|filename}}.

<!--T:15-->
Example:

</translate>
{{Code|code=
import FreeCAD as App
import Draft
import importSVG

doc = App.newDocument()

polygon1 = Draft.make_polygon(3, radius=500)
polygon2 = Draft.make_polygon(5, radius=1500)

doc.recompute()

objects = [polygon1, polygon2]
importSVG.export(objects, "/home/user/Pictures/myfile.svg")
}}
<translate>


Keep in mind that SVG is a 2D format, so all Z information will be disregarded (all objects will be flattened).


<!--T:10-->
====Preferences====
{{Docnav
|[[Draft_DXF|Autodesk .DXF .DWG]]
|[[Draft_OCA|Open Cad format .OCA]]
|[[Draft_Module|Draft]]
|IconL=
|IconR=
|IconC=Workbench_Draft.svg
}}


</translate>
The following parameters can be specified in the [[Draft Preferences]] tab (menu Edit -> Preferences -> Draft):
{{Draft Tools navi{{#translation:}}}}
* Import style: This lets you choose the way objects from the svg file will be drawn in FreeCAD. You can choose between:
{{Userdocnavi{{#translation:}}}}
** None: this is the faster way, there is no conversion, all objects will be black with 2px width (FreeCAD default)
[[Category:File Formats{{#translation:}}]]
** Use default color and linewidth: All imported objects will take current linewidth/color from the draft command bar
** Original color and linewidth: Objects will keep the color and linewidth (if specified) they have in the svg file

Latest revision as of 08:03, 15 September 2021

Description

Draft SVG is a software module used by the Std Open, Std Import and Std Export commands to handle the SVG file format.

Inkscape drawing exported to SVG, which is subsequently opened in FreeCAD

Importing

The following SVG objects can be imported:

  • PATH objects
  • LINE objects
  • RECT objects
  • CIRCLE objects
  • ELLIPSE objects
  • POLYGON objects
  • POLYLINE objects

Limitations

FreeCAD will not import path objects that have only one point (forum discussion).

Exporting

The following FreeCAD objects can be exported:

  • Lines and wires (polylines)
  • Arcs and circles
  • Faces
  • Texts
  • Dimensions

Limitations

SVG is a 2D format, so all Z information will be disregarded (all objects will be flattened).

Unit Handling

When exporting, a User Unit (px) equals one millimeter.

When importing, the width, height and viewBox attributes are respected. All elements are scaled to their size in millimeters, which is FreeCAD's internal unit. If the SVG does not contain information on its physical size, it is assumed to have a 90 DPI resolution. Using absolute units in attributes inside the SVG should be avoided. Relative units like em, ex and % are currently not supported.

The Inkscape SVG Editor currently works only with 90 DPI documents. No matter which unit is selected in Inkscape. All the output has to be considered converted to 90 DPI and rounded to 6 decimal places. As FreeCAD (and the SVG standard) is agnostic to the precision of rounding done in Inkscape these values will not be rounded on input. And odd values in millimeter will remain. If you need the SVG import not to be rounded, work on User Units (px) in Inkscape. Scaling can be done after the import in FreeCAD or by changing the width, height and viewbox attributes.

Preferences

See Import Export Preferences.

Scripting

See also: Autogenerated API documentation and FreeCAD Scripting Basics.

To export objects to SVG use the export method of the importSVG module.

importSVG.export(exportList, filename)
  • For the Windows OS: use a / (forward slash) as the path separator in filename.

Example:

import FreeCAD as App
import Draft
import importSVG

doc = App.newDocument()

polygon1 = Draft.make_polygon(3, radius=500)
polygon2 = Draft.make_polygon(5, radius=1500)

doc.recompute()

objects = [polygon1, polygon2]
importSVG.export(objects, "/home/user/Pictures/myfile.svg")