Dialog creator for 2D sections of beams

[oddtopus]

Hi, I started to work on the subject here, to include that in dodo wb later.
At this time the dialog is already working: if you wish to try it, just copy the files of the folder in your macros path and then type

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import dialog4

in the python console.


Now, I'd like to move the section so that its CenterOfMass lies in the origin but somehow this code doesn't work in the execute() method:

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        p = Part.makePolygon([p1,p2,p3,p4,p5,p6,p1])
        s = Part.Face(p)
        v=s.CenterOfMass.negative() 
        s.translate(v) # to move the c.o.m. in (0,0,0). Why does it not work?
        obj.Shape = s

What happens is that the polygon and the face are created correctly and also assigned to the .Shape of obj. But the face is not translated as requested after the .recompute() of the ActiveDocument.

The strange thing is that if I type each line in python console to a) create the polygon and b) create the face and c) translate the face and finally d) Part.show(s), it DOES work!

Is there a difference in the .execute() method from the Part.show() command that makes the .translate() operation uneffective?

Suggestions are welcome. Thanks in advance.

[Kunda1]

Path to image was broken. Here is the correct URL: