Curves workbench

[hammax]

...first try => it looks a little bit weird

FC.17.13354

CurvesWB_Pipeshell_2.PNG (38.84 KiB) Viewed 2514 times

[hammax]

...PipeShell apparently does not like the "Slot-Feature" in sketcher.
I used an actual example out of the german forum. (flattened pipe)
Using only circles in sketcher the feature works as expected and parameters can be explored.
Sorry for the bad start.

Diffusor.PNG (54.48 KiB) Viewed 2447 times

[hammax]

...and it works with BSplines .
Is it also usable with open profiles?

Hull_PipeShell.PNG (37.7 KiB) Viewed 2443 times

[Chris_G]

Is it also usable with open profiles?

It is usable with open profiles.
It is a "Part.Sweep" with more options.
So it should be able to do everything Part.Sweep can do.
I don't know if this tool will be really useful, but at least, it offers an easy way to explore the different options.

[Stéphane Combet]

Hello,
Wow, what an incredible work here!

I've installed this WB.
But: I am new in FreeCAD world, and I've seen screenshots here and there with other amazing curved stuff, and I wonder : do I need this WB to my project? Or is there something simpler in my case? And, I am with v16, I heard v17 does more with curves but are there commun points/differences with your great Curves WB?

Thank you!
(my project: molds for a personnal RC sailplane, https://forum.freecadweb.org/viewtopic.php?f=12&t=26757)

[Chris_G]

I've installed this WB.
But: I am new in FreeCAD world, and I've seen screenshots here and there with other amazing curved stuff, and I wonder : do I need this WB to my project? Or is there something simpler in my case? And, I am with v16, I heard v17 does more with curves but are there commun points/differences with your great Curves WB?

Hello,
The workbench is not tested with 0.16, and I know some tools won't work with this version.

(my project: molds for a personnal RC sailplane, https://forum.freecadweb.org/viewtopic.php?f=12&t=26757)

I'll go there for further discussion.

[UR_]

Just played a little bit with "sketch on surface", immediately coming up with a question.

How should a sketch looks like, to fit onto a cone?

sketches on cone.png (45.35 KiB) Viewed 2209 times

outline didn't fit to cone's face. Seem should be a straight line, shouldn't?


file:

WrapOnCone.FCStd

(12.43 KiB) Downloaded 79 times

[Chris_G]

Just played a little bit with "sketch on surface", immediately coming up with a question.
How should a sketch looks like, to fit onto a cone?
outline didn't fit to cone's face. Seem should be a straight line, shouldn't?

Hi,
Every surface in FC (and I suppose this is the same in every CAD software) has a rectangle topology: its parametric space is a rectangle that goes from (u0,v0) to (u1,v1).

Code: Select all

Cone.Shape.Face1.ParameterRange
>>> (0.0, 6.283185307179586, 0.0, 107.70329614269008)

So the easiest way to use the Sketch_on_surface tool is to create a surrounding square (as blue construction geometry) and draw inside it.
Then set to True the properties "Construction Bounds" and "Scale" of the Sketch_on_surface object.

sos.jpg (35.3 KiB) Viewed 2174 times

In your cone example, you'll see that the upper edge of the bounding square degenerates to a point ( the tip of the cone ).

[UR_]

Oh, yes, i see.
Many thanks for clarification!

Unfortunately its a non conformal transformation , even if surface is developable.

[Jee-Bee]

Every surface in FC (and I suppose this is the same in every CAD software) has a rectangle topology: its parametric space is a rectangle that goes from (u0,v0) to (u1,v1).

Code: Select all

Cone.Shape.Face1.ParameterRange
>>> (0.0, 6.283185307179586, 0.0, 107.70329614269008)

Some support also spherical/polar coordinate systems. this can probably change the results of that kind of curves...