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Re: Curves workbench
Posted: Mon May 02, 2022 5:53 pm
by Chris_G
Hi Chris,
The spiral curve is not parametrized by arc-length.
(I think it is parametrized by angle)
So you first need discretize and approximate the spiral, to get the arc-length parametrization.
Re: Curves workbench
Posted: Mon May 02, 2022 6:05 pm
by chrisb
Chris_G wrote: ↑Mon May 02, 2022 5:53 pm
The spiral curve is not parametrized by arc-length.
(I think it is parametrized by angle)
So you first need discretize and approximate the spiral, to get the arc-length parametrization.
Thanks for the fast and exhaustive answer!
Re: Curves workbench
Posted: Mon May 02, 2022 6:53 pm
by edwilliams16
I think you need to re-parameterize the spiral :
Curves|Join Curves
Curves|Discretize
Curves|Approximate Parameterization = Uniform
then the curve parameter will be uniform in length. (but from 0 to 1 - so the sketch need to be scaled somehow?)
EDIT: I see chrisG already got this - of course.
Re: Curves workbench
Posted: Mon May 09, 2022 4:42 pm
by Kunda1
Re: Curves workbench
Posted: Mon May 09, 2022 5:48 pm
by chrisb
Kunda1 wrote: ↑Mon May 09, 2022 4:42 pm
bumping for visibility
Good old Fiat 127?
Re: Curves workbench
Posted: Mon May 09, 2022 6:05 pm
by Kunda1
chrisb wrote: ↑Mon May 09, 2022 5:48 pm
Good old Fiat 127?
Looks like one, doesn't it?
Lets ask?
Re: Curves workbench
Posted: Mon May 23, 2022 5:28 pm
by Chris_G
I have added a new tool : Flatten Face
It creates a parametric developed face from cylindrical and conical faces.
Only option is "InPlace" to put face on XY plane, or tangent to source face.
- flatten.png (139.76 KiB) Viewed 1253 times
Re: Curves workbench
Posted: Mon May 23, 2022 6:17 pm
by chrisb
Chris_G wrote: ↑Mon May 23, 2022 5:28 pm
I have added a new tool : Flatten Face
Thanks, this has been asked for quite often!
Re: Curves workbench
Posted: Tue May 24, 2022 11:49 am
by hammax
... it works with regular cones and cylinders.
Trying to generate an oblique cone/cylinder by pure placement of the top sketch001 => no result.
Only the cutting part should be oriented.
- Curved.PNG (12.59 KiB) Viewed 1176 times
Re: Curves workbench
Posted: Tue May 24, 2022 1:43 pm
by Chris_G
hammax wrote: ↑Tue May 24, 2022 11:49 am
Trying to generate an oblique cone/cylinder by pure placement of the top sketch001 => no result.
This type of loft (oblique) produces BSpline surfaces.
The tool only work on faces supported by a real mathematical cone or cylinder.