blenderBIM window list with global orientation

hannes

Hi everyone,
I´m using blenderbim quite often for energy calculations. In this process I currently use a combination of blenderbim - Sketchup and other methods.
One of my main tasks for my evaluation is to get correct window informations.
I use ifc2csv to get a complete window list with Heigth | Width etc. What I am not able to obtain is the global orientation of the window (to asses the solar energy gain).

I found Python code snippets in an earlier post
https://community.osarch.org/discussion/1026/ifcwindow-normal-according-to-world
Does someone know a way to combine ifc2csv with Python code or a similar approach?
Regards Hannes

Andrej730

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

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

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

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

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

@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]