Part API Euler Spirals?

[HakanSeven12]

Is the part API support euler spirals? If not, can someone add it?

[chrisb]

Have a look at what the Python console shows on creation of a spiral.

[HakanSeven12]

Euler spiral not same thing with this one. It start from infinite radius and goes to a spesific radius like this:

https://images.app.goo.gl/awrp9aRBe8pAWKb89

or this:

https://images.app.goo.gl/UZ5g3QuDju8uvqaB8

[chrisb]

I see, sorry for the noise. Asking for the API means that OCC supports it?

[HakanSeven12]

Like we can create lines circles or arcs by using api and it return a shape and we can use that shape. I want something similar for spiral

[chrisb]

I understand what you want, but the API (=Application Programming Interface) is only an interface to some OCC functions. AFAIK these functions are not implemented natively in FreeCAD.

[Chris_G]

And a quick search didn't return any result in the OpenCascade API either ...

[chrisb]

Chris_G: thanks for confirming.
HakanSevven12: You may have a look at the addon macro 3D_Parametric_Curve.

[HakanSeven12]

What are you thinking about that?

[wmayer]

What are you thinking about that?

Like we can create lines circles or arcs by using api and it return a shape and we can use that shape. I want something similar for spiral

While lines, circles or arcs are directly supported by OCCT this is not the case for Euler spirals. So, the only feasible way is to have a function that creates (an approximated) B-Spline curve from an Euler spiral. This function can be part of FreeCAD or a Python add-on. Are there any formulas to do the calculation?