How to cut the lower part horizontally with Arch SectionPlane?

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Willi2006
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Joined: Sun Jan 31, 2021 10:56 pm

How to cut the lower part horizontally with Arch SectionPlane?

Post by Willi2006 »

I tried to cut the lower part of a building to inspect the upper part from bottom. Couldn't find something in the Wiki or in the Forum. I tried to cut a sphere using different values for Angle of the Section and got a strange behaviour or made a mistake.

Section Angle set to 0°: The upper part gets cut.
Section Angle set to 0°: The upper part gets cut.
Arch SectionPlane Sphere 0.png (90.38 KiB) Viewed 699 times
Section Angle set to 122°: The right lower part gets cut.
Section Angle set to 122°: The right lower part gets cut.
Arch SectionPlane Sphere 122.png (99.05 KiB) Viewed 699 times
Section Angle set to 123°: The left upper part gets cut.
Section Angle set to 123°: The left upper part gets cut.
Arch SectionPlane Sphere 123.png (92.74 KiB) Viewed 699 times
Section Angle set to 180°: The upper part gets cut again.
Section Angle set to 180°: The upper part gets cut again.
Arch SectionPlane Sphere 180.png (90.44 KiB) Viewed 699 times

How to set the Section Properties to get the lower part cut horizontally for inspecting the inner side of the object from the bottom?

Arch SectionPlane Sphere.FCStd
(4.75 KiB) Downloaded 34 times

OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git)
Build type: Release
Branch: releases/FreeCAD-0-19
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Python version: 3.8.6+
Qt version: 5.15.2
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thomas-neemann
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Re: How to cut the lower part horizontally with Arch SectionPlane?

Post by thomas-neemann »

Willi2006 wrote: Sun Aug 01, 2021 9:50 am
I can't find a way either, but if you don't want to do it with slice a part (which is more general) you could turn your model 180 degrees
Gruß Dipl.-Ing. (FH) Thomas Neemann

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paullee
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Re: How to cut the lower part horizontally with Arch SectionPlane?

Post by paullee »

Willi2006 wrote: Sun Aug 01, 2021 9:50 am I tried to cut the lower part of a building to inspect the upper part from bottom. Couldn't find something in the Wiki or in the Forum. I tried to cut a sphere using different values for Angle of the Section and got a strange behaviour or made a mistake.
Have a look at this discussion thread - negative Z axis Direction in Section plane, hope it tells the way it works and limitation :)
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