[Solved] Visible line on section view could not be shown

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mwlandolsi
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Joined: Sun Jan 31, 2021 10:49 pm

[Solved] Visible line on section view could not be shown

Post by mwlandolsi »

Please see attached files, all is there. Just create a sketch with as shown in the section and revolve it.
Screenshot from 2023-05-31 12-25-45.png
Screenshot from 2023-05-31 12-25-45.png (35.76 KiB) Viewed 914 times

Code: Select all

OS: Ubuntu Core 20 (X-Cinnamon/cinnamon)
Word size of FreeCAD: 64-bit
Version: 0.21.0.33340 (Git) Snap 718
Build type: Release
Branch: master
Hash: 568f25ba346abad8854414dfa305d51a4d8cdc9d
Python 3.8.10, Qt 5.15.7, Coin 4.0.0, Vtk 7.1.1, OCC 7.6.3
Locale: English/United States (en_US)
Installed mods: 
  * sheetmetal 0.2.63
  * frame 0.1.0
  * Assembly3 0.12.0
  * Curves 0.6.9
  * lattice2 1.0.0
  * Render 2023.2.5
  * fasteners 0.4.56
Attachments
test section revolve.FCStd
(46.83 KiB) Downloaded 9 times
Last edited by mwlandolsi on Thu Jun 01, 2023 7:28 pm, edited 1 time in total.
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thomas-neemann
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Re: visible line on section view could not be shown

Post by thomas-neemann »

mwlandolsi wrote: Wed May 31, 2023 11:29 am
for this and other reasons i use persistent section cut. I dimension in the 3D window with draft and create pdf plans via print
Bildschirmfoto_2023-05-31_13-32-49.png
Bildschirmfoto_2023-05-31_13-32-49.png (41.57 KiB) Viewed 904 times
Gruß Dipl.-Ing. (FH) Thomas Neemann

https://www.youtube.com/@thomasneemann5 ... ry=freecad
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wandererfan
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Re: visible line on section view could not be shown

Post by wandererfan »

mwlandolsi wrote: Wed May 31, 2023 11:29 am
The missing edges are a bit odd.
testSectionRevolve_crazyEdge.png
testSectionRevolve_crazyEdge.png (16.25 KiB) Viewed 839 times
Turn on "Allow crazy edges"
PreferencesCrazyEdges.png
PreferencesCrazyEdges.png (86.91 KiB) Viewed 839 times
and you will get the missing edges
testSectionRevolve.png
testSectionRevolve.png (22.93 KiB) Viewed 839 times
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bensay
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Re: visible line on section view could not be shown

Post by bensay »

@wandererfan What is the definition of a crazy edge internally?
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mwlandolsi
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Re: visible line on section view could not be shown

Post by mwlandolsi »

Thank you, momently it works.
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wandererfan
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Re: visible line on section view could not be shown

Post by wandererfan »

bensay wrote: Thu Jun 01, 2023 6:36 pm @wandererfan What is the definition of a crazy edge internally?
An linear edge on the page that is less than 0.0001 mm or more than 10 m. An ellipse that has minor diameter less than 0.0001 or a major diameter more than 10 m on the page. There something for BSplines too, maybe 10000x length to endpoint separation.

In this case there is an ellipse that has a minor that is about equal to the line thickness.
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bensay
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Re: visible line on section view could not be shown

Post by bensay »

wandererfan wrote: Thu Jun 01, 2023 10:50 pm In this case there is an ellipse that has a minor that is about equal to the line thickness.
I don't get how the minor has such small length, the diameter is 13,8 mm? Or is it because it renders the hole as an ellipse instead a linear line when doing section view?

Also, maybe we should consider adding the tolerances to the preferences?
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