Curves workbench

[Chris_G]

This is a CurvesWB bug.
No time right now. I'll have a look tomorrow.

[drmacro]

Thanks!

[Chris_G]

Not sure if this is my problem, or FC, or Curves...

If you select an edge from a Body that has been transformed (as well as the sketch for the body having an attachment offset) and discretize the edge, it is at the original angle of the sketch offset, but at the original origin of the sketch.

Bug fixed. Thanks.

[Zoltan]

Dear @Chris_G,

How can I use the Curves workbench from Python? I would like to import the interpolate module.

Thank you,
Zoltan

[Chris_G]

How can I use the Curves workbench from Python? I would like to import the interpolate module.

Many tools in Curves are mainly Gui upon existing Part API.
So these tools are not supposed to be re-used in other scripts.
The interpolate tool is based on Part.BSplineCurve.interpolate :

Code: Select all

help(Part.BSplineCurve.interpolate)

interpolate(...)
Replaces this B-Spline curve by interpolating a set of points.
The function accepts keywords as arguments.

interpolate(Points = list_of_points)

Optional arguments :

PeriodicFlag = bool (False) : Sets the curve closed or opened.
Tolerance = float (1e-6) : interpolating tolerance

Parameters : knot sequence of the interpolated points.
If not supplied, the function defaults to chord-length parameterization.
If PeriodicFlag == True, one extra parameter must be appended.

EndPoint Tangent constraints :

InitialTangent = vector, FinalTangent = vector
specify tangent vectors for starting and ending points
of the BSpline. Either none, or both must be specified.

Full Tangent constraints :

Tangents = list_of_vectors, TangentFlags = list_of_bools
Both lists must have the same length as Points list.
Tangents specifies the tangent vector of each point in Points list.
TangentFlags (bool) activates or deactivates the corresponding tangent.
These arguments will be ignored if EndPoint Tangents (above) are also defined.

Note : Continuity of the spline defaults to C2. However, if periodic, or tangents
are supplied, the continuity will drop to C1.

[Zoltan]

Many tools in Curves are mainly Gui upon existing Part API.
So these tools are not supposed to be re-used in other scripts.

OK, thank you. In the meantime, I wrote my wrapper around Part.BSplineCurve.interpolate based on the code of your workbench.

[byteofsoren]

Hi. I think I found a bug.
When I reopen a file that uses rails I get

2021-08-07-151617_449x138_scrot.png (23.69 KiB) Viewed 1705 times

Code: Select all

File "/home/magnus/.FreeCAD/Mod/Curves/freecad/Curves/approximate.py", line 204, in execute
    num = len(self.Points)
<class 'AttributeError'>: 'Approximate' object has no attribute 'Points'
15:24:03  Recompute failed! Please check report view.

Hope that this helps.

[Kunda1]

Hi. I think I found a bug.

Please always add your full About info when reporting potential bugs. Hi and welcome to the forum.

Oh yea...are you using the most up to date version of the Curves Workbench? (You can check by going to Addon Manager -> highlighting the Curves WB and clicking update.

[byteofsoren]

Shure was, updated it.
Thank you for your hard work.

/MS

[freecad-heini-1]

Hello Chris,
please be so kind and check the tool reflect Lines. I have a plastic part with bevels and rounded edges and would like to have the silhoette edge from the radii for the parting surface of mould inserts. Reflect Lines produces a curve, but it is not at the geometry but far outside.
I am enclosing a sample file for you.
Many greetings, Wilfried

Reflect_Lines_wrong_result.FCStd

(217.49 KiB) Downloaded 50 times

Code: Select all

OS: Ubuntu 18.04.5 LTS (XFCE/xubuntu)
Word size of FreeCAD: 64-bit
Version: 0.20.
Build type: Release
Branch: unknown
Hash: a0d860679ef6c932e2997d712210e2832f7ebb65
Python version: 3.6.9
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.5.2
Locale: German/Germany (de_DE)