IFCPatch tool now available

Zanoni

I tried to install via pip install ifcpatch but I couldn't.

How do I download the ifcpatch folder?

I'm just trying to shift the ifc model on the z axis. I tried using pure ifcopenshell but in each iteration the starting position of the next element is the ending position of the previous iteration. I tried to reset the initial position of the elements but it didn't work.

import ifcopenshell

def deslocar_elements(model_ifc, displacement_z):

for element in model_ifc.by_type('IfcProduct'):

    initial_position = list(element.ObjectPlacement.RelativePlacement.Location.Coordinates)


    new_position = [initial_position[0], initial_position[1], initial_position[2] + displacement_z]


    element.ObjectPlacement.RelativePlacement.Location.Coordinates = new_position

    new_position = [initial_position[0], initial_position[1], initial_position[2] - displacement_z]

file_ifc = "D:....\model.ifc"

displacement_z = 20.0

model_ifc = ifcopenshell.open(file_ifc)

deslocar_elements(model_ifc, displacement_z)

model_ifc.write("D:...\model_new.ifc")

mcnill

You can download the ifcopenshell repo from Github:
https://github.com/IfcOpenShell/IfcOpenShell
I guess you need to clone the repo or download a zip-archive (green "code" button).
Ifcpatch is located in the src subfolder.
https://github.com/IfcOpenShell/IfcOpenShell/tree/v0.7.0/src/ifcpatch

Zanoni

@mcnill thanks! now it worked!

glennvnbc

I am a noob in ifcopenshell and ifcpatch.
My goal is to create individual ifc files for every prefabricated concrete element with accessories from an existing ifc file created with Tekla. The following code causes an error which i did not find on other forums. Any help or tips are appreciated.
There are multiple IfcWall entities in my ifc file.
Perhaps a little context... I work from Belgium, where we use a decimal comma in stead of a point. Maybe this could be important.

output = ifcpatch.execute({
    "input": "S:file.ifc",
    "file": ifcopenshell.open("S:/file.ifc"),
    "recipe": "ExtractElements",
    "arguments": [".IfcWall"]
})

 Traceback (most recent call last):
  File "S:\IFC\IfcOpenShell\Test ifcpatch ExtractElements.py", line 43, in <module>
    output = ifcpatch.execute({
  File "S:/Python/Lib/site-packages/ifcopenshell/ifcpatch\ifcpatch\__init__.py", line 79, in execute
    patcher.patch()
  File "S:/Python/Lib/site-packages/ifcopenshell/ifcpatch\ifcpatch\recipes\ExtractElements.py", line 64, in patch
    for element in ifcopenshell.util.selector.filter_elements(self.file, self.query):
  File "S:\Python\lib\site-packages\ifcopenshell\util\selector.py", line 263, in filter_elements
    transformer.transform(filter_elements_grammar.parse(query))
  File "S:\Python\lib\site-packages\lark\lark.py", line 658, in parse
    return self.parser.parse(text, start=start, on_error=on_error)
  File "S:\Python\lib\site-packages\lark\parser_frontends.py", line 104, in parse
    return self.parser.parse(stream, chosen_start, **kw)
  File "S:\Python\lib\site-packages\lark\parsers\earley.py", line 279, in parse
    to_scan = self._parse(lexer, columns, to_scan, start_symbol)
  File "S:\Python\lib\site-packages\lark\parsers\xearley.py", line 152, in _parse
    to_scan = scan(i, to_scan)
  File "S:\Python\lib\site-packages\lark\parsers\xearley.py", line 125, in scan
    raise UnexpectedCharacters(stream, i, text_line, text_column, {item.expect.name for item in to_scan},
lark.exceptions.UnexpectedCharacters: No terminal matches ',' in the current parser context, at line 1 col 1

,IfcWall
^
Expected one of: 
    * ESCAPED_STRING
    * BANG
    * __ANON_3
    * TYPE
    * __ANON_1
    * __ANON_0
    * SLASH
    * __ANON_4
    * LOCATION
    * CLASSIFICATION
    * __ANON_2
    * MATERIAL

Massimo

@glennvnbc try with ["IfcWall"] without the dot

glennvnbc

@Massimo thanks for the respons
when using ["IfcWall"] i get

  File "S:\IFC\IfcOpenShell\Test ifcpatch ExtractElements.py", line 44, in <module>
    output = ifcpatch.execute({
  File "S:\Python/Lib/site-packages/ifcopenshell/ifcpatch\ifcpatch\__init__.py", line 79, in execute
    patcher.patch()
  File "S:\Python/Lib/site-packages/ifcopenshell/ifcpatch\ifcpatch\recipes\ExtractElements.py", line 65, in patch
    self.add_element(element)
  File "S:\Python/Lib/site-packages/ifcopenshell/ifcpatch\ifcpatch\recipes\ExtractElements.py", line 70, in add_element
    new_element = self.append_asset(element)
  File "S:\Python/Lib/site-packages/ifcopenshell/ifcpatch\ifcpatch\recipes\ExtractElements.py", line 87, in append_asset
    return ifcopenshell.api.run(
  File "S:\Python\lib\site-packages\ifcopenshell\api\__init__.py", line 66, in run
    result = usecase_class(ifc_file, **settings).execute()
TypeError: Usecase.__init__() got an unexpected keyword argument 'reuse_identities'

I am using IfcOpenShell (0.7.0.231218) - latest version to date
The documentation on blenderbim has the following information for class ifcopenshell.api.project.append_asset
class ifcopenshell.api.project.append_asset.Usecase(file, library=None, element=None,reuse_identities=None)

The current ifcopenshell\api\project\append_asset.py does not have a parameter "reuse_identities"
def __init__(self, file, library=None, element=None):

Ifcpatch ExtractElements calls api.project.append_asset with reuse_identities
return ifcopenshell.api.run("project.append_asset", self.new, library=self.file, element=element, reuse_identities=self.reuse_identities)

Is this a recent update issue?

Andrej730

@glennvnbc said:
Is this a recent update issue?

yes, you'll need to update ifcopenshell