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

Post here for help on using FreeCAD's graphical user interface (GUI).
Forum rules
and Helpful information
IMPORTANT: Please click here and read this first, before asking for help

Also, be nice to others! Read the FreeCAD code of conduct!
giostark
Posts: 28
Joined: Tue Oct 16, 2018 10:29 pm

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

Postby giostark » Tue Oct 15, 2019 3:55 pm

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
line-cross-plane-03.png (40.2 KiB) Viewed 556 times
line-cross-plane-02.png
line-cross-plane-02.png (23.74 KiB) Viewed 556 times
line-cross-plane.png
line-cross-plane.png (18.57 KiB) Viewed 562 times
Last edited by giostark on Tue Oct 15, 2019 7:00 pm, edited 1 time in total.
User avatar
pl7i92LCNC
Posts: 209
Joined: Tue Mar 12, 2019 3:03 pm
Location: RLP DE

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

Postby pl7i92LCNC » Tue Oct 15, 2019 5:31 pm

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
Posts: 28
Joined: Tue Oct 16, 2018 10:29 pm

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

Postby giostark » Tue Oct 15, 2019 6:59 pm

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
line-cross-plane-07.png (33.22 KiB) Viewed 529 times
line-cross-plane-06.png
line-cross-plane-06.png (18.74 KiB) Viewed 532 times
line-cross-plane-05.png
line-cross-plane-05.png (17.06 KiB) Viewed 532 times
line-cross-plane-04.png
line-cross-plane-04.png (22.26 KiB) Viewed 532 times
chrisb
Posts: 19484
Joined: Tue Mar 17, 2015 9:14 am

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

Postby chrisb » 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.
UR_
Posts: 1013
Joined: Tue Jan 03, 2017 8:42 pm

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

Postby UR_ » Wed Oct 16, 2019 7:43 am

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
Screenshot 003.png (12.8 KiB) Viewed 479 times
Screenshot 002.png
Screenshot 002.png (30.07 KiB) Viewed 479 times
proximityPoint.FCStd
(11.5 KiB) Downloaded 10 times
chrisb
Posts: 19484
Joined: Tue Mar 17, 2015 9:14 am

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

Postby chrisb » Wed Oct 16, 2019 8:24 am

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
Snip macro screenshot-b2a68d.png (6.65 KiB) Viewed 469 times
Attachments
DatumPointOnLineAndPlane.FCStd
(6.14 KiB) Downloaded 10 times
Roy_043
Posts: 525
Joined: Thu Dec 27, 2018 12:28 pm

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

Postby Roy_043 » Wed Oct 16, 2019 8:37 am

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
Posts: 28
Joined: Tue Oct 16, 2018 10:29 pm

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

Postby giostark » Wed Oct 16, 2019 10:02 pm

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 417 times
giostark
Posts: 28
Joined: Tue Oct 16, 2018 10:29 pm

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

Postby giostark » Wed Oct 16, 2019 10:29 pm

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
Posts: 19484
Joined: Tue Mar 17, 2015 9:14 am

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

Postby chrisb » Thu Oct 17, 2019 5:01 am

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