[TechDraw] Hatch (and not GeometricHatch) line width

[gatlib]

Hi everyone,

With TechDraw GeometricHatch, it is possible to set the width of the hatch lines: the "Weight Pattern" property.

I'm looking for a way to set the line width of TechDraw Hatch. Is this somehow possible? It does not seem possible reading the documentation, or playing around with the various lines properties of the corresponding view. Is it necessary to modify the svg pattern?

Thanks for any hint or work-around.

Code: Select all

OS: Debian GNU/Linux 10 (buster) (XFCE/lightdm-xsession)
Word size of FreeCAD: 64-bit
Version: 2023.811.0.14555 (Git shallow) AppImage
Build type: Release
Branch: HEAD
Hash: d31fdf6ab71bf52a96d5d3b81f3b8349bca24e27
Python 3.11.4, Qt 5.15.8, Coin 4.0.1, Vtk 9.2.5, OCC 7.7.2
Locale: English/United States (en_US)

[chrisb]

Moved from Help forum.

[gatlib]

A possible work-around: it may be possible to play with the ratio between the "Scale" of the View and the "Svg Pattern Scale" of the Hatch.
This is not suitable for my use-case, where I use distinct Hatch for various surfaces in the same view.

@chrisb In the future, should I directly post in the Dev/TechDraw forum rather than in the Help forum for help using TechDraw?

[wandererfan]

Is it necessary to modify the svg pattern?

Yes. The hatch is a mosaic of the small svg tiles and the code doesn't know anything about the line width used in the tile. The picture shows the standard "simple" pattern with "stroke-width:1px" in the circle and a modified pattern "simple_fat" with "stroke-width:5px" in the square.

simpleAndsimple_fat.png (49.21 KiB) Viewed 226 times

[gatlib]

OK, thanks for confirming @wandererfan.

A little follow-up question: I couldn't find an easy way to update the hatches when I manually modify my custom *.svg pattern ("Recompute" has no effect).
I have to choose another hatch pattern in Combo>Data>Hatch>Hatch Pattern and then go back to the modified *.svg for the change to appear.
Is it possible to do that with less clicks?

[wandererfan]

A little follow-up question: I couldn't find an easy way to update the hatches when I manually modify my custom *.svg pattern ("Recompute" has no effect).
I have to choose another hatch pattern in Combo>Data>Hatch>Hatch Pattern and then go back to the modified *.svg for the change to appear.
Is it possible to do that with less clicks?

Took me a while to figure out what you meant. You are changing the svg pattern file while FC is running? If the file name property doesn't change, then the file changed logic won't be triggered. Even redraw all views won't help.

[gatlib]

Sorry for being unclear... Indeed, I modify the *.svg pattern file while freecad is running. For example to try/choose the correct thickness of the hatching lines. Thanks for confirming that there is nothing more straightforward than my work-around to update the hatches in the drawings.

Would a feature request e.g. to be able to reload the pattern be useful? (Not necessary for me, but it would ease-off a bit the modification of line width for Hatch.)