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BlenderBIM, Is a wall in a ifc-file based on a wire or based on a face or just a bound of faces

  1. B by bernd on 13 Sep 2021, edited 18 May 2022 #

    I assume this can be found in BlenderBIM, but how?

    If it is based on a wire. Where can the wall thickness be found and changed?

    a sample ifc file is attached ...

    cheers bernd

  2. C by carlopav on 13 Sep 2021, edited 13 Sep 2021 #

    Hello Bernd, Just guessing ti see if i can understand something :)

    Wall on line 62 for example has 2 representation. One Is the body and One Is the axis.

    The body Is an extrudedareasolid, based on a rectangle that has a thickness of 0.15m. so if you want to change the thickness you should change that parameter at line 49.

    The axis Is a 2 point polyline, defined at row 57, and has anything to do with the definition of the body representation and so with the thickness.

    I dont see in the file any informations about the material, so the thickness of the Wall seems only to be represented in the Wall body...

    Hope i didn't write any wrong thing :)

  3. B by bernd on 13 Sep 2021, edited 13 Sep 2021 # +2 votes

    @carlopav said:

    Wall on line 62 for example has 2 representation. One Is the body and One Is the axis.

    The body Is an extrudedareasolid, based on a rectangle that has a thickness of 0.15m. so if you want to change the thickness you should change that parameter at line 49.

    The axis Is a 2 point polyline, defined at row 57, and has anything to do with the definition of the body representation and so with the thickness.

    I dont see in the file any informations about the material, so the thickness of the Wall seems only to be represented in the Wall body...

    This is what I know from all my ifc knowledge too. :-)

    But I am interested to know how this information could be retrieved and changed in BlenderBIM gui?

  4. A by Ace on 13 Sep 2021 #

    The IFC material Type of the IFC wall gives it it's thickness, you can change it from there

  5. B by bernd on 14 Sep 2021 #

    where do I find this in Blender BIM? Do you have a screen?

  6. A by Ace on 14 Sep 2021 #

    Here is a screenshot ^

  7. A by Ace on 14 Sep 2021 #

    And here is a video showing how IFC Object materials are created in BlenderBim:

  8. A by Ace on 14 Sep 2021, edited 14 Sep 2021 #
  9. C by Coen on 14 Sep 2021 #

    @Ace said:

    Here is a screenshot ^

    Which version of BlenderBIM is that?

  10. A by Ace on 14 Sep 2021 #

    I'm running 12.09.2021

    Normally I'm on the daily build,

    but this featureset has been there since 22.05.2021

  11. A by Ace on 14 Sep 2021 #
  12. C by Coen on 17 May 2022 #

    Is it possible to roundtrip the thickness of an IfcWall with IfcWallType in BlenderBIM? If not, what's a good way to store a thickness parameter for a wall in IFC?

  13. M by Moult on 18 May 2022 # +1 votes

    @Coen the thickness should always be roundtripped :)

  14. C by Coen on 18 May 2022 #

    @Moult said:

    @Coen the thickness should always be roundtripped :)

    My phrasing of the question was a bit unfortunate, let me try again:

    Is it possible to drive the width of a IfcWall with a type paramter stored in IFC? Hope I explain myself clear.

  15. M by Moult on 18 May 2022 # +1 votes

    @Coen yes, the wall type has a material layer set which parametrically defines the thickness of the wall type. All occurrences of that wall type inherit the material layers, and so also inherit the thickness. Changing the type thickness will change all the occurrences too.

  16. C by Coen on 18 May 2022 #

    @Moult

    Cool :-D, I should look into that

  17. T by theoryshaw on 18 May 2022 # +1 votes

    more details mentioned here.

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