Plane definition in step file FreeCad

[Miketsu]

Hi all,

I’m writing a simple step file that take some 2d points and add a thickness to the resulting 2D surface to make it 3D.

I used only 2 planes 1 in Zy and 1 in XZ direction.
But in the resulting step file I see some Xz or yz faces missing,
Could anyone explain me about correct definition of pcurve containing a plane (a point + 2 direction) and a line (a 2d point in the plane +direction)

ATB

[chrisb]

Moved to help forum.

[NormandC]

Hello,

I wasn't even aware that people wrote STEP files directly, and not through a CAD program. We are mostly end users here, we create our models in FreeCAD and export to STEP when we need to. As for FreeCAD developers, I don't know if there are any with a deep knowledge of how a STEP file is written internally.

Maybe easyw-fc? He's done some work with STEP import/export.

ping

[easyw-fc]

Hello,

I wasn't even aware that people wrote STEP files directly, and not through a CAD program. We are mostly end users here, we create our models in FreeCAD and export to STEP when we need to. As for FreeCAD developers, I don't know if there are any with a deep knowledge of how a STEP file is written internally.

Maybe easyw-fc? He's done some work with STEP import/export.

ping

We have generated a huge electronic 3D library in STEP through FreeCAD.
https://forum.freecadweb.org/viewtopic.php?t=20892
The library is based on python scripts, so the result is fully parametric and configurable.
But we have used CadQuery WB and FreeCAD (with OCC) as vehicle to convert 3D geometries to STEP.
The same could be done using python OCC.
http://www.pythonocc.org/

I made some tests before finding FC,CQ & OCC much easier and powerful for my needs.