Curves workbench

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!
User avatar
hammax
Posts: 1191
Joined: Thu Jan 19, 2017 5:03 pm
Location: Ammersee

Re: Curves workbench

Postby hammax » Fri Jan 10, 2020 2:58 pm

… abused your frame sketch picture,
built a new frame by a 7-control-point Sketcher BSpline
Scaled 2 clones and made a Loft.
If the frames are "smooth" the hull also will be.

G_Loft.PNG
G_Loft.PNG (33.04 KiB) Viewed 661 times
Attachments
Gord_Loft.FCStd
(30.31 KiB) Downloaded 22 times
User avatar
hammax
Posts: 1191
Joined: Thu Jan 19, 2017 5:03 pm
Location: Ammersee

Re: Curves workbench

Postby hammax » Sat Jan 11, 2020 8:40 am

… and here a possible workflow.
Different frame sketches.
Also with a final Gordon surface.

BSpline_constr_2.PNG
BSpline_constr_2.PNG (102.55 KiB) Viewed 618 times
Attachments
Gord_Loft_3.FCStd
(12 KiB) Downloaded 23 times
Gord_Loft_2.FCStd
(63.13 KiB) Downloaded 19 times
Last edited by hammax on Sun Jan 12, 2020 7:24 am, edited 2 times in total.
Will_C
Posts: 8
Joined: Wed Jan 01, 2020 1:49 pm

Re: Curves workbench

Postby Will_C » Sat Jan 11, 2020 10:08 am

hammax wrote:
Sat Jan 11, 2020 8:40 am
… and here a possible workflow.
Also with a final Gordon surface.


BSpline_constr_2.PNG
Thank you Hammax.

I will try this approach then :)
User avatar
GlouGlou
Posts: 2523
Joined: Sun Apr 05, 2015 9:02 am
Location: La Rochelle, France

Re: Curves workbench

Postby GlouGlou » Fri Jan 24, 2020 6:30 pm

A idea:
Why not use isocurve to make points instead a mesh. (should be an option)
With theses points, we will able to rebuild a new surface (smoothed?) and mix several cloud points to create a new mixed surface with the approximate feature.
...
and thank you for the new feature Line. ;)
soaring
Posts: 48
Joined: Sat Dec 31, 2016 10:27 pm

Re: Curves workbench

Postby soaring » Sun Jan 26, 2020 3:56 pm

@Will_C, dont hesitate to share your progress about fuselage to the thread of best practice, i guess it can help other too :) "Best practice: fuselage + wing" : https://forum.freecadweb.org/viewtopic. ... 14#p363614

@hammax thank you for your file "Gord_Loft_2" very helpful ! Dummie question, but in this file, do you know a possibility to get a solid from the Gordon or Gordon_mirr objects ?

@Chris_G : fantastic job, lot of gratitude !
freecad-heini-1
Posts: 7296
Joined: Tue Jan 07, 2014 11:10 am
Contact:

Re: Curves workbench

Postby freecad-heini-1 » Mon Jan 27, 2020 9:10 pm

Chris_G wrote:Ping
Hi Chris,
Please look at Blend Curve. The end of the curve is not at the edge, but offset on the surface. This looks like a mistake.
blend_curve_wrong_position.png
blend_curve_wrong_position.png (26.44 KiB) Viewed 397 times
sweep_zwei_bleche_90-grad.FCStd
(15.65 KiB) Downloaded 14 times
Maybe you can look for this feature request at this time:
Chris_G wrote:
Thu Jan 09, 2020 1:48 pm
Hi Wilfried,
I looked at the video.
I see what you ask for.
This should be possible pretty easily.
I lack free time, but I'll give a try when possible.
Best regards
Wilfried

Code: Select all

OS: Ubuntu 18.04.3 LTS (XFCE/xubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.
Build type: Release
Python version: 3.6.9
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: German/Germany (de_DE)
27.01.2020
User avatar
Chris_G
Posts: 1476
Joined: Tue Dec 31, 2013 4:10 pm
Location: France
Contact:

Re: Curves workbench

Postby Chris_G » Tue Jan 28, 2020 5:28 pm

freecad-heini-1 wrote:
Mon Jan 27, 2020 9:10 pm
Please look at Blend Curve. The end of the curve is not at the edge, but offset on the surface. This looks like a mistake.
This should be fixed now.
User avatar
Chris_G
Posts: 1476
Joined: Tue Dec 31, 2013 4:10 pm
Location: France
Contact:

Re: Curves workbench

Postby Chris_G » Tue Jan 28, 2020 5:33 pm

I added a new tool : Multi-Loft
The goal is to loft "multi-face" objects like shapestrings.
multiloft.png
multiloft.png (206.19 KiB) Viewed 339 times
freecad-heini-1
Posts: 7296
Joined: Tue Jan 07, 2014 11:10 am
Contact:

Re: Curves workbench

Postby freecad-heini-1 » Tue Jan 28, 2020 5:42 pm

Thank you very much Chris, and whow, a new Feature to play with. 8-)

What about my feature request / wish for to improve the blend curve?:
https://peertube.mastodon.host/videos/w ... 9f8a5510d0
chrisb
Posts: 27955
Joined: Tue Mar 17, 2015 9:14 am

Re: Curves workbench

Postby chrisb » Tue Jan 28, 2020 6:30 pm

I have more and more the feeling that this workbench should be part of core FreeCAD!