Draft SVG/tr: Difference between revisions

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[[Image:Screenshot inkscape.jpg]]
[[Image:Screenshot inkscape.jpg]]
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===Opening===
== Description ==
This function imports SVG files as workable 2D objects, as opposed to the built-in drawing module which imports svg files as sheet drawings.
This function imports [[SVG]] files as workable [[Draft Workbench]] objects, as opposed to the [[Drawing Workbench]] [[Drawing Open SVG|Open SVG]] function which imports SVG files as sheet drawings.

[[Image:Screenshot inkscape.jpg]]
{{Caption|Inkscape drawing exported to SVG, which is subsequently opened in FreeCAD}}

== Opening ==
The following SVG objects get imported at the moment:
The following SVG objects get imported at the moment:
* PATH objects
* PATH objects
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* POLYLINE objects
* POLYLINE objects


===Importing===
== Importing ==
Works the same way as opening but creates the objects in the active document instead of creating a new one.
Works the same way as opening but creates the objects in the active document instead of creating a new one.


===Exporting===
== Exporting ==
The following objects can be exported in an SVG file:
The following objects can be exported in an SVG file:
* Lines and wires (polylines)
* Lines and wires (polylines)
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Keep in mind that SVG is a 2D format, so all Z information will be disregarded (all objects will be flattened).
Keep in mind that SVG is a 2D format, so all Z information will be disregarded (all objects will be flattened).


===Preferences===
== Preferences ==
The following parameters can be specified in the [[Draft Preferences]] tab (menu Edit -> Preferences -> Draft):
The following parameters can be specified in the [[Draft Preferences]] tab ({{MenuCommand|Edit Preferences Draft}}):
* Import/Export -> Import style: This lets you choose the way objects from the svg file will be drawn in FreeCAD. You can choose between:
* Import/Export Import style: This lets you choose the way objects from the svg file will be drawn in FreeCAD. You can choose between:
** None: this is the faster way, there is no conversion, all objects will be black with 2px width (FreeCAD default)
** None: this is the faster way, there is no conversion, all objects will be black with 2px width (FreeCAD default)
** Use default color and linewidth: All imported objects will take current linewidth/color from the draft command bar
** 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
** Original color and linewidth: Objects will keep the color and linewidth (if specified) they have in the svg file
* Import/Export -> Export Style:
* Import/Export Export Style:
** Translated: All elements are translated that their coordinates are positive. This should aid display and printing. The output coordinate system is NOT cosistent between individualy exported elements.
** Translated: All elements are translated that their coordinates are positive. This should aid display and printing. The output coordinate system is not consistent between individually exported elements.
** Raw: The position of all elements preserved. This intended for CAM usage for example in PyCAM. Layers or Slices exported individualy will match.
** Raw: The position of all elements preserved. This intended for CAM usage for example in PyCAM. Layers or Slices exported individually will match.
* General settings -> Internal precision level:
* General settings Internal precision level:
** This value is used to check if a bezier curve segment has to be considered a straight line. If you import detailed paths, like rendered text, you may want to increase this setting up to 6. If you are working with Inkscape please consider to raise the precision in the SVG file, well. (Inkscape Menu -> File -> Inkscape Preferences -> SVG Output -> Numeric Precision)
** This value is used to check if a bezier curve segment has to be considered a straight line. If you import detailed paths, like rendered text, you may want to increase this setting up to 6. If you are working with Inkscape please consider to raise the precision in the [[SVG]] file, well. (Inkscape {{MenuCommand|Menu File Inkscape Preferences SVG Output Numeric Precision}})


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


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If you need the SVG import not to be rounded, work on User Units (px) in Inkscape. Scaling can be done after the import to FreeCAD or by changing the width, height and viewbox attributes.
If you need the SVG import not to be rounded, work on User Units (px) in Inkscape. Scaling can be done after the import to FreeCAD or by changing the width, height and viewbox attributes.


== Scripting ==
[[Category:User Documentation]]
{{Emphasis|See also:}} [[Draft API]] and [[FreeCAD Scripting Basics]].

You can export elements to SVG by using the following function:
{{Code|code=
importSVG.export(exportList, filename)
}}

Example:
{{Code|code=
import Draft, importSVG

Polygon1 = Draft.makePolygon(3, radius=500)
Polygon2 = Draft.makePolygon(5, radius=1500)

objects = [Polygon1, Polygon2]

importSVG.export(objects, "/home/user/Pictures/myfile.svg")
}}

{{Draft Tools navi}}
{{Userdocnavi}}
{{clear}}

Revision as of 20:22, 23 January 2019

Description

This function imports SVG files as workable Draft Workbench objects, as opposed to the Drawing Workbench Open SVG function which imports SVG files as sheet drawings.

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

Opening

The following SVG objects get imported at the moment:

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

Importing

Works the same way as opening but creates the objects in the active document instead of creating a new one.

Exporting

The following objects can be exported in an SVG file:

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

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

Preferences

The following parameters can be specified in the Draft Preferences tab (Edit → Preferences → Draft):

  • Import/Export → Import style: This lets you choose the way objects from the svg file will be drawn in FreeCAD. You can choose between:
    • None: this is the faster way, there is no conversion, all objects will be black with 2px width (FreeCAD default)
    • 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
  • Import/Export → Export Style:
    • Translated: All elements are translated that their coordinates are positive. This should aid display and printing. The output coordinate system is not consistent between individually exported elements.
    • Raw: The position of all elements preserved. This intended for CAM usage for example in PyCAM. Layers or Slices exported individually will match.
  • General settings → Internal precision level:
    • This value is used to check if a bezier curve segment has to be considered a straight line. If you import detailed paths, like rendered text, you may want to increase this setting up to 6. If you are working with Inkscape please consider to raise the precision in the SVG file, well. (Inkscape Menu → File → Inkscape Preferences → SVG Output → Numeric Precision)

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 millimeter, which is FreeCAD internal unit. If the SVG does not contain information on its physical size, it is assumed to have 90 DPI resolution. Using absoulte units in attributes inside the SVG should be avoided. Relative units like em,ex and % are currently not supported.

The SVG Editor Inkscape 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 to FreeCAD or by changing the width, height and viewbox attributes.

Scripting

See also: Draft API and FreeCAD Scripting Basics.

You can export elements to SVG by using the following function:

importSVG.export(exportList, filename)

Example:

import Draft, importSVG

Polygon1 = Draft.makePolygon(3, radius=500)
Polygon2 = Draft.makePolygon(5, radius=1500)

objects = [Polygon1, Polygon2]

importSVG.export(objects, "/home/user/Pictures/myfile.svg")