[SOLVED] Point of intersection of a curved line with a datum plane

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giostark
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Location: Italy

[SOLVED] Point of intersection of a curved line with a datum plane

Post by giostark »

Hi all! :)
Still here to trick my eyes in front of the monitors ...

OS: Arch Linux
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16131 (Git) AppImage
Build type: Release
Branch: (HEAD detached at 0.18.3)
Hash: 3129ae4296e40ed20e7b3d460b86e6969acbe1c3
Python version: 3.6.7
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

I'm trying to figure out how to determinate the point of intersection of the topper line (orange) with a datum plane , for build a sketch section for complete a solid (using loft).
Also if I added two datum plane (one trough the bottom single line and the other trough the top line) it seems i cant select a thing.
Also editing the top line I'm not able to select the datum plane for retrieve a reference .
There is a tool for make this selection? Or a technique for achieve this?

Many thanks as always ;)
Attachments
line-cross-plane-03.png
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line-cross-plane-02.png
line-cross-plane-02.png (23.74 KiB) Viewed 3257 times
line-cross-plane.png
line-cross-plane.png (18.57 KiB) Viewed 3263 times
Last edited by giostark on Tue Oct 15, 2019 7:00 pm, edited 1 time in total.
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pl7i92LCNC
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Re: Point of intersection of a curved line with a datum plane

Post by pl7i92LCNC »

can you please add the freecad file to see whats going on
yuo shoudt be able to pick almost every construction point on all sketches you made for Datumplane
you need one more sketch for the loft to be completed
and the plane is just a known offset to a base plane
giostark
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Joined: Tue Oct 16, 2018 10:29 pm
Location: Italy

Re: Point of intersection of a curved line with a datum plane

Post by giostark »

Thanks pl7 for the attention ;)

Your statement push me to try other solution and you where right.
I edited (and duplicate) the top line and constructed a line that bring a point useful for the other sketch.
So finally I have my point of intersection ready to be used.
Attachments
line-cross-plane-07.png
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line-cross-plane-06.png
line-cross-plane-06.png (18.74 KiB) Viewed 3233 times
line-cross-plane-05.png
line-cross-plane-05.png (17.06 KiB) Viewed 3233 times
line-cross-plane-04.png
line-cross-plane-04.png (22.26 KiB) Viewed 3233 times
chrisb
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Re: [SOLVED] Point of intersection of a curved line with a datum plane

Post by chrisb »

I am missing the attachment possibility for placing a DatumPoint on a plane plus on a line, which would yield the intersection point.
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UR_
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Re: [SOLVED] Point of intersection of a curved line with a datum plane

Post by UR_ »

chrisb wrote: Tue Oct 15, 2019 9:28 pm I am missing the attachment possibility for placing a DatumPoint on a plane plus on a line, which would yield the intersection point.

Have you tried ProximityPoint?

Screenshot 003.png
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Screenshot 002.png
Screenshot 002.png (30.07 KiB) Viewed 3180 times
proximityPoint.FCStd
(11.5 KiB) Downloaded 43 times
chrisb
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Re: [SOLVED] Point of intersection of a curved line with a datum plane

Post by chrisb »

UR_ wrote: Wed Oct 16, 2019 7:43 am Have you tried ProximityPoint?
Yes, but it doesn't lie always on the curved line:
Snip macro screenshot-b2a68d.png
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Attachments
DatumPointOnLineAndPlane.FCStd
(6.14 KiB) Downloaded 42 times
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Roy_043
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Re: [SOLVED] Point of intersection of a curved line with a datum plane

Post by Roy_043 »

There is indeed a problem in V0.19. In V0.18 things seem to work.

V.019 (problem):

Code: Select all

OS: Windows 8.1 (6.3)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.18524 (Git)
Build type: Release
Branch: master
Hash: bea009c1d52b97655dab2d5c0fbddec30989a902
Python version: 3.6.8
Qt version: 5.12.1
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Dutch/Netherlands (nl_NL)
V0.18 (OK):

Code: Select all

OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 32-bit
Version: 0.18.16093 +38 (Git)
Build type: Release
Branch: (HEAD detached at 0.18.3)
Hash: 3129ae4296e40ed20e7b3d460b86e6969acbe1c3
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: Dutch/Netherlands (nl_NL)
giostark
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Re: [SOLVED] Point of intersection of a curved line with a datum plane

Post by giostark »

I confirm that the UR_ suggestion work with 0.18 version (datum plane + sketch edge selected). Is so damn faster than construct lots of geometries. Thanks!!!
There are much options in all the tools ... I must investigate them far better.
Attachments
line-cross-plane-08.png
line-cross-plane-08.png (20.02 KiB) Viewed 3118 times
giostark
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Location: Italy

Re: [SOLVED] Point of intersection of a curved line with a datum plane

Post by giostark »

OT
Is not the right thread but just for have an idea...
Could be useful a section in the Wiki (maybe under tutorial) named "How to:" and a list of specific realizations by users ?
Or do you think is enough expand the description of the tools?
In this case under datum point are totally missing the other options/modes: https://freecadweb.org/wiki/PartDesign_Point#Options
Ex: (added by many users that encounter the difficulty and solved it).
How to :
-Find a point of intersection between a plan and a line.
-Build a basket ball.
-cutting a gear with ...
-ecc ecc
So looking for "intersection" could appear a list of "tutorial" concerning "intersections". Is stupid or useless?
/OT
chrisb
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Re: [SOLVED] Point of intersection of a curved line with a datum plane

Post by chrisb »

Any kind of good explanations is helpful and thus welcome. In some areas such as how to create a thread we have this already.
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