How to run 'refine shape' from python

[RandomPipeBender]

Hi everyone,

I have a part that's constructed by joining two parts via 'fuse':

Code: Select all

part = face.extrude(Base.Vector(x, 0, 0))

anotherface = Part.Face(w)
anotherpart = anotherface.extrude(Base.Vector(some_other_x, 0, 0 ))

union = part.fuse(anotherpart)
union.removeSplitter()
Part.show(union)

Unfortunately this still has a 'seam' where the two original parts were joined:

Screenshot_20210518_081723.png (4.48 KiB) Viewed 1965 times

This seam disappears after running Part -> Create a copy -> Refine shape manually in the GUI. According to https://wiki.freecadweb.org/Part_RefineShape/en the equivalent in python is to run 'removeSplitter()' on the part in question but that doesn't seem to work (see code above). Am I missing something? Any pointers would be greatly appreciated.

Just in case: I'm running freecad 0.19.2 on Fedora 34 which is built against opencascade 7.5.0.

[onekk]

Try to do:

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union = part.fuse(anotherpart).removeSplitter()
Part.show(union)

But if you have shown the original thing ie anotherpart or part you will have two solid visualized so you have at lest hide "original" solids.

Regards

Carlo D.

[RandomPipeBender]

Try to do:

Code: Select all

union = part.fuse(anotherpart).removeSplitter()
Part.show(union)

But if you have shown the original thing ie anotherpart or part you will have two solid visualized so you have at lest hide "original" solids.

I see. That worked, thank you very much. It wasn't quite clear from the description in the wiki if 'removeSplitter()' has a side effect on the part on which it is called or it would return a modified part. I guess I should have check https://freecad.github.io/SourceDoc/d2/ ... ePart.html?

[Chris_G]

removeSplitter() doesn't modify the shape, it creates a new shape.
So, you should do :

Code: Select all

cleaned_shape = union.removeSplitter()
Part.show(cleaned_shape)

EDIT : Nevermind, I was too slow

[chrisb]

You may also consider to set the Refine property to true in the union.

[RandomPipeBender]

You may also consider to set the Refine property to true in the union.

Thanks! I there a piece of documentation listing the available properties for the 'fuse' function? If it's not asking too much, could you tell me how to set this property.

Code: Select all

union = part.fuse(part2, Refine=True)

Doesn't work and I can't find any details in the wiki.

[chrisb]

If it's not asking too much, could you tell me how to set this property.

Of course it's not too much, but I am no expert in this. I don't know how to do this in a single step, so I would do it in two:

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union = part.fuse(part2, Refine=True)
union.Refine = True

I think that all Properties which you see in the GUI's data and view tabs are available in this way.

[RandomPipeBender]

Code: Select all

union = part.fuse(part2, Refine=True)
union.Refine = True

I think that all Properties which you see in the GUI's data and view tabs are available in this way.

Both don't work for me. The first one throws:

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<class 'TypeError'>: fuse() takes no keyword arguments

The second one:

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<class 'AttributeError'>: 'Part.Shape' object has no attribute 'Refine'

[openBrain]

Beware not to mix up things.

'Fusion' as FreeCAD feature/operation (that acts on objects) has a 'Refine' property.

'fuse()' as a function that applies on shapes (TopoShape) --what you're using here-- doesn't have such an option. You have to post process the resulting shape of the fuse function with 'removeSplitter()'.

[chrisb]

Sorry! I had tested it here and then transferred it to the names you used - and got the wrong post with your not working example. You have to set Refine for the fusion you created, so it should be

Code: Select all

part = face.extrude(Base.Vector(x, 0, 0))

anotherface = Part.Face(w)
anotherpart = anotherface.extrude(Base.Vector(some_other_x, 0, 0 ))

union = part.fuse(anotherpart)
union.Refine = True

Only the last line is from me.

Edit: Obviously does openBrain know much better what's going on.