New IFC facet-based selector syntax

B by bernd on 12 Sep 2024, edited 12 Sep 2024 # +3 votes

solved one of the two problems ...

@bernd said:

A property name does have a Space inside. I am not able to filterfor this property values ...

query = "IfcWall, Architekt.'Tragendes Bauteil'=/^FALSE/"

it has to be

query = 'IfcWall, Allreal."Tragendes Bauteil"=/^FALSE/'

B by bernd on 16 Sep 2024, edited 16 Sep 2024 #

noone out here a idea if it is not implemented or if I do some mistake ...

@bernd said:

next problem to solve ...

"material" filters Materials, "Name" filters by Name ...

What do I need to filter Layer ? I tried "Layer" and "layer" but both did not return something reasonable ...

from IFC ...

#113754=IFCPRESENTATIONLAYERASSIGNMENT('115 Liftanlagen.002',$,(#25008,#25402,#25403,#25404,#25405,#25406,#25407),$);

T by theoryshaw on 17 Sep 2024 # +2 votes

Maybe...

S by steverugi on 18 Sep 2024 #

@theoryshaw said:

Maybe...

thanks, I meant to add yours to my query examples but, what is a practical use of layer in Bonsai? the same as in DWG? cheers

T by theoryshaw on 18 Sep 2024 # +1 votes

Yes, as i understand it, it's kinda like that. I don't use it, however.

B by bernd on 11 Sep 2024 #

Just got the model seen in the screen from an landscape architect. 180 MB but probably 95% data volumes are trees which I do not need at all ... Let BBIM help myself to get something to easily work with ...

First idea:

Open the file in BBIM and delete the trees works fine, but takes two hours on my machanine. But BBIM did not crash :-) But there must be a better way ... Actually there is ...

Second idea, use the filter and IfcPatch

Start by finding the correct filter by python ...

from ifcopenshell.util import selector

query = "IfcBuildingElement"

len(ifcopenshell.util.selector.filter_elements(ifcfile, query))

query = "IfcBuildingElement, Name!=/^Platane/, Name!=/^Bush/, Name!=/^Willow/, Name!=/^Black_Maple/, Name!=/^Nordmann/, Name!=/^Elm_Tree/, Name!=/^Chestnut_Tree/"

len(ifcopenshell.util.selector.filter_elements(ifcfile, query))

results in:

>>> 

>>> from ifcopenshell.util import selector

>>> query = "IfcBuildingElement"

>>> len(ifcopenshell.util.selector.filter_elements(ifcfile, query))

724

>>> query = "IfcBuildingElement, Name!=/^Platane/, Name!=/^Bush/, Name!=/^Willow/, Name!=/^Black_Maple/, Name!=/^Nordmann/, Name!=/^Elm_Tree/, Name!=/^Chestnut_Tree/"

>>> len(ifcopenshell.util.selector.filter_elements(ifcfile, query))

576

>>>

Since it seams to work fine, use IfcPatch tool from BBIM Gui with the query from above:

IfcBuildingElement, Name!=/^Platane/, Name!=/^Bush/, Name!=/^Willow/, Name!=/^Black_Maple/, Name!=/^Nordmann/, Name!=/^Elm_Tree/, Name!=/^Chestnut_Tree/

takes just 10 minutes all together and results in a ifc of around 11.4 MB ... :-) More than 10 times faster than open the file in BBBIM Gui, deleting the elems and save the file and much more robust.

O by Owura_qu on 18 Sep 2024 #

Good evening. How do I exclude IfcAnnotation[GRID] from my drawings when I create them. All efforts are not yielding results.

Thank you.

T by theoryshaw on 18 Sep 2024, edited 18 Sep 2024 # +1 votes

Exclude: IfcAnnotation, ObjectType = GRID

O by Owura_qu on 18 Sep 2024 #

@theoryshaw said:

Exclude: IfcAnnotation, ObjectType = GRID

Thank you very much.