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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
Kunda1 wrote: Sun Mar 13, 2022 4:58 pm Heads-up:
[Bug] Rotating the zebra lines is also rotating the reference image/s
https://github.com/tomate44/CurvesWB/issues/64

phpBB [video]
bumping for visibility

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?
pafurijaz wrote:ping

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
flatten.png (139.76 KiB) Viewed 442 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
Curved.PNG (12.59 KiB) Viewed 366 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.