blenderBIM window list with global orientation

Comments

• Andrej730

  December 2023

  I think the simple way to combine them would be to write a script to calculate the orientation and save it to some property set and then access it from ifc2csv.

  
• Moult

  December 2023

  Agreed, using get_local_placement will give you vectors for X Y Z. X is east and Y is north: https://blenderbim.org/docs-python/ifcopenshell-python/code_examples.html#get-the-xyz-coordinates-of-a-element

  
• hannes

  December 2023

  Thank you Andrej730 and Moult for your quick response.
  As I'm more a civil engineer than a programmer forgive my maybe silly questions
  I tried to execute the ifcopenshell commands in blenders Python console but could not get a result

  >>> import ifcopenshell.util.placement
  >>> 
  >>> window = model.by_type("IfcWindow")[0]
  Traceback (most recent call last):
    File "<blender_console>", line 1, in <module>
  NameError: name 'model' is not defined
  
  >>> 
  >>> matrix = ifcopenshell.util.placement.get_local_placement(window.ObjectPlacement)
  Traceback (most recent call last):
    File "<blender_console>", line 1, in <module>
  AttributeError: 'Context' object has no attribute 'ObjectPlacement'
  
  >>> 
  >>> print(matrix[:,3][:3])
  

  Is there a possibility to execute the commands in the Python console of Blender?
  What I would like to find is

  • search the IFC Datastructure with BlenderBIM methods (IFC Search, point and click ...)
  • then execute the proposed script from inside blender on the search filter
  • write custom property set back to the search
  • execute IFC2CSV

  many thanks for your time

  
• hannes

  December 2023 edited December 2023

  Hi again,
  I was able to get some way
  with the following code in the Blender Python console

  >>> for object in bpy.data.objects:
  ...     print (f"{object.name} has normal vector {object.matrix_world.col[1].to_3d()} and location {object.location}")
  

  I get a somewhat usable list

  IfcWindow/Fenster-011.017 has normal vector <Vector (1.0000, 0.0000, 0.0000)> and location <Vector (3508.8879, -494.1635, 3.8000)>
  IfcWindow/Fenster-011.018 has normal vector <Vector (1.0000, 0.0000, 0.0000)> and location <Vector (3508.8879, -489.1644, 3.8000)>
  IfcWindow/Fenster-011.019 has normal vector <Vector (1.0000, 0.0000, 0.0000)> and location <Vector (3508.8879, -489.1644, 3.8000)>
  IfcWindow/Fenster-011.020 has normal vector <Vector (1.0000, 0.0000, 0.0000)> and location <Vector (3508.8879, -494.1635, 3.8000)>
  IfcWindow/Fenster-011.021 has normal vector <Vector (-1.0000, 0.0000, 0.0000)> and location <Vector (3516.6328, -493.8635, 3.8000)>
  

  For me this can be a good start, but it is the complete list of objects in the file.

  What I now would like to achieve is to use a filtered and selected list from blenderbim
  
  select this list in the console

  >>> for selected_object in bpy.context.selected_objects:
  ...     print (f"{selected_object.name} has normal vector {selected_object.matrix_world.col[1].to_3d()} and location {selected_object.location}")
  

  and I get the filtered list!!!
  My next steps would be

  • add custom pset from Python console to selected_objects (any hints how to)
  • add normal vector to pset
  • ifc2csv
• hannes

  January 2024

  Happy New Year,
  I´ve been busy before the holiday season and therefore was not able to nail down some points.
  I tried to get the GUID with the python script

  import blenderbim.tool as tool
  for selected_object in bpy.context.selected_objects:
  print (f"{selected_object.name} ; has normal vector ; {selected_object.matrix_world.col[1].to_3d()} ; and location ; {selected_object.location} ; height ; {selected_object.BIMWindowProperties.overall_height} ; width ; {selected_object.BIMWindowProperties.overall_width} ; type; {selected_object.BIMWindowProperties.window_type} ; GlobalId ; {tool.Ifc.get_entity(bpy.context.selected_objects[0]).GlobalId}")
  

  But I´m getting a list with the Windows, orientations, positions but only the first overall_heigth, overall width, window_type and GlobalId?

  IfcWindow/Element ohne Kämpfer:FET 1-tlg - ML 1100 x 2570 - FB ; has normal vector ; <Vector (-0.0000, -1.0000, 0.0000)> ; and location ; <Vector (19.7464, 1.1184, -0.2000)> ; height ; 0.8999999761581421 ; width ; 0.6000000238418579 ; type; SINGLE_PANEL ; GlobalId ; 04BQj6$jz1Oh70$fH7F2rh
  IfcWindow/Element ohne Kämpfer:FET 2-tlg - ML 2100 x 2570 - FB ; has normal vector ; <Vector (-0.0000, -1.0000, 0.0000)> ; and location ; <Vector (12.3864, 1.1184, -0.2000)> ; height ; 0.8999999761581421 ; width ; 0.6000000238418579 ; type; SINGLE_PANEL ; GlobalId ; 04BQj6$jz1Oh70$fH7F2rh
  IfcWindow/Element ohne Kämpfer:FET 2-tlg - ML 2100 x 2570  ; has normal vector ; <Vector (-0.0000, -1.0000, 0.0000)> ; and location ; <Vector (9.5864, 1.1184, -0.2000)> ; height ; 0.8999999761581421 ; width ; 0.6000000238418579 ; type; SINGLE_PANEL ; GlobalId ; 04BQj6$jz1Oh70$fH7F2rh
  IfcWindow/Element ohne Kämpfer:FET 2-tlg - ML 2100 x 2570 .001 ; has normal vector ; <Vector (-0.0000, -1.0000, 0.0000)> ; and location ; <Vector (6.5864, 1.1184, -0.2000)> ; height ; 0.8999999761581421 ; width ; 0.6000000238418579 ; type; SINGLE_PANEL ; GlobalId ; 04BQj6$jz1Oh70$fH7F2rh
  
  

  Somehow I missed something. Can someone guide me to my error?

  Hannes
• Arv

  January 2024 edited January 2024

  @hannes said:
  {tool.Ifc.get_entity(bpy.context.selected_objects[0]).GlobalId}

  Try this as tool.Ifc.get_entity(bpy.context.selected_object).GlobalId ie without indexing as selected_objects[0]