How to get the center of gravity coordinates of parts？

[Zhigang-shrek]

I found that your test failed in your test file. Did you find any new methods？Appreciate

[evereux]

Just cloned the repo and run the tests. That test does not fail here.

[Zhigang-shrek]

You mean the last method in your test file?
Thank you!

[evereux]

I think you're talking about this

pycatia/tests/test_measurable.py

Line 216 in 1cb3dde

def test_get_center():

This isn't the last test and while I commented in the code that it failed all the tests do pass (this test is commented out). I wrote these tests sometime ago so I'd forgotten about it and your posts confused me.

I'll have a look at this and see if i can solve it.

[Zhigang-shrek]

I'm really talking about this. I set part_body as reference but couldn't get the center.
I don't know whether it's my own problem or any other problem or not. After seeing the post, I found that you also encountered this problem, so I came to ask you.
Thanks again！

[evereux]

This works for me.

from pycatia import CATIADocHandler
from pycatia import CATIAMeasurable
from pycatia import create_measurable
from pycatia import create_spa_workbench

measurable_part = 'tests\\CF_catia_measurable_part.CATPart'



with CATIADocHandler(measurable_part) as handler:
    catia = handler.catia
    document = handler.document

    center = (-47.039, 83.488, 0.0)

    spa_workbench = create_spa_workbench(document.document)
    part = document.part()

    body = part.get_body_by_name('PartBody')

    body_reference = part.create_reference(body)
    body_measurable = create_measurable(spa_workbench, body_reference)

    catia_measurable_body = CATIAMeasurable(body_measurable)
    catia_center = catia_measurable_body.get_cog(catia)

    print(catia_center)

[Zhigang-shrek]

Does this method not apply in the products documentation?
For example, I want to get the center of gravity coordinates of a part in products.

[Zhigang-shrek]

I want to get the center of gravity coordinates of each part in an assembly, and judge the relationship between each part through some algorithms. And I'm sorry that I didn't tell you that I used Visual Basic 6.0 to do CATIA development. Thank you for your reply. You don't need to help me. Let me find a way for myself. If I solve it, I'll let you know at the first time.

[evereux]

I've just pushed some updates to the Master branch that'll help you do what I think you want.

Take a look at example_10.py.

[Zhigang-shrek]

I think I still need your help. This is my code written in VB:
Dim part1
Set part1 = selection1.Item(1).Value
Dim ref1 As Reference
Set ref1 = part1.CreateReferenceFromObject(part1.MainBody)
Dim TheSPAWorkbench As Workbench
Set TheSPAWorkbench = CATIA.ActiveDocument.GetWorkbench("SPAWorkbench")
Dim TheMeasurable As Object
Set TheMeasurable = TheSPAWorkbench.GetMeasurable(ref1)
Dim VOL
VOL = TheMeasurable.Volume 'Return the volume of part1
Dim coords(2)
TheMeasurable.GetCOG (coords)
Dim x1, y1, z1
x1 = coords(0)
y1 = coords(1)
z1 = coords(2)

Part1 is a part body, I can get the volume of part1 in this way. But I use GetCOG to get the center of gravity coordinates and return null values. I don't know where the problem is.

[evereux]

Where is your python code? VB code is no help to me.

[evereux]

I'm closing this as it doesn't seem to be related to pycatia.