Curves workbench

[hooshsim]

Here it is.

[Chris_G]

Everything work OK here.
When you select 2 edges and activate the BlendCurve tool, a BlendCurve object is created, but the 2 input edges are still selected.
Are you sure you clear the selection, by click somewhere in the 3D view, before going for the second BlendCurve ?

[hooshsim]

Clicking in the 3D view does not clear the selected curves. I still see curves selected once I click. Could it be a preference setup?

[hooshsim]

Chris,
Just figured it out by accident. Setting Navigation Style to CAD will fix the BlendC_Curve issue. I had somehow set my Navigation Style set to OpenInventor. My previous thread of Gordon might be related to this as well...will check it out later.
Thanks for the support.

[hammax]

… some post before we talked about IsoCurve concerning GlouGlou's definition.
https://forum.freecadweb.org/viewtopic. ... 70#p342960
Defining wing profiles there exists the so called "camber line":
https://en.wikipedia.org/wiki/Camber_%28aerodynamics%29

camber line, the curve Z(x) that is halfway between the upper and lower surfaces

IsoCurve could be the tool to reproduce camber line on existing profiles, for getting a feeling of profiles curvatures.
I made different tests, generating such camber lines and got good and weird results.
https://forum.freecadweb.org/viewtopic. ... 26#p343870
Does the code the correct calculation?

IsoCurve_3.png (26.24 KiB) Viewed 1698 times

[Vincent B]

CurveOnSurface:
Each time the curve reach degree 14, it give some errors.
Is it possible to limit the degree of the bspline?

[Chris_G]

CurveOnSurface:
Each time the curve reach degree 14, it give some errors.
Is it possible to limit the degree of the bspline?

Well ... the curve is definitely not on the surface.
The curveOnSurface tool is not a projection tool; it only uses a projection fallback for some tricky situations.
The curve is supposed to already be ON the surface.

[Vincent B]

ok, i thought this tool was planned to do that as well to carry out a cladding (plaquage en francais)

[Vincent B]

Could you make an option to reverse the U and V coordinates?
thanks a lot.

[LLuoss]

I think you should try to build the fillet detail surface separately from the main surface.
Like in the attached file, for example.

Thanks a lot!Finally,I solved it.Now,I have another question.How do I export a curve into mesh(.obj)?The emphasis is on curves and obj formats!Hope your reply.