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How would I define/model my own IfcWindowType and add it to the IFC4 Demo Library?

1. S by System on 2 Sep 2022, edited 5 Sep 2022 #

   This discussion was created from comments split from: <a href="/discussion/993/writing-a-blenderbim-tutorial-at-epfl-stuck-on-ifcwindow-and-ifcopeningelement/">Writing a BlenderBIM tutorial at EPFL. Stuck on IfcWindow and IfcOpeningElement</a>.

2. C by Coen on 2 Sep 2022 #

   How would I define/model my own IfcWindowType and add it to the IFC4 Demo Library?

3. T by theoryshaw on 2 Sep 2022 #

   I thought i did, but it seems, doing the following, doesn't bring in the geometry.

4. C by cvillagrasa on 2 Sep 2022 #

   I'm also on the lookout for this topic. I've recently started to tackle the refactor of the model module and this is something I'd want to make easy and intuitive. As always, I'll try my best for some days and then call super @Moult for guidance ?

5. N by Nigel on 3 Sep 2022 # +1 votes

   This is a topic dear to my heart as well.

   A great topic for a step by step video would get a lot of people, myself included, making library objects to a standard that can shared

6. A by Ace on 4 Sep 2022 # +1 votes

   At the moment I've gotten it to work by breaking this into two steps

   make the IfcWindow

   Add the window to the Ifc library

   save the Ifc library

   otherwise it gets all messed up

   How to make a IFC WINDOW from scratch?

   1. Model as Blender element -> Label it (e.g. 600x800_Alum_Window)

   2. Draw proper 2d representation in separate object

   3. Create Ifc project (no library) Save as IfcType -> Window (IfcElementType->IfcWindowType->Prdefinied type = WINDOW not LIGHTDOME)

   4. Add 2d representation in Ifc Geometry (Plan/annotation/PLAN_VIEW)

   5. While in 2d representation Join Objects (select IFC window last so not to override)

   6. Position your 2d view and Save Ifc while in 2d representation

   And then open the IFc4 demo library and add it in the project library tab then save and it will be included

7. C by Coen on 4 Sep 2022 #

   @Ace

   Could you provide a more detailed explanation? I am specifically talking about IfcWindowType so I could use it as an instance in my IFC projects.

8. A by Ace on 4 Sep 2022 # +2 votes

   Hey @Coen this is for an IfcWindow type or any type honestly, my internet is a bit on strike at the moment (the last few days) but when it recovers I'll upload a video. I've made windows, doors, bathtubs, toilets as IfcTypes and they've all worked so far ;) it takes about 10mins each

9. A by Ace on 5 Sep 2022 # +3 votes

   Ok so internet does not want the video so here are screenshots:

   Make an IfcType from scratch in BlenderBim

   Example IfcWindowType

   Step 1: Model as Blender element -> Label it (e.g. 600x800_Alum_Window)

   

   To save time what I do here is actually just copy another IfcWindowType I have already made (You can copy the window from the Ifc4 Library), first load and select the window, then break the Ifc Class then copy to your second Blender

   

   Step 2: Draw proper 2d representation in separate object

   

   Again I just load the other IfcWindow Type -> select the 2d representation -> break the link to the IfcClass then copy across

   

   NB: rename the objects once you have copied across or the IFC file will mix up your IfcTypes

   Step 3: Create Ifc project (no library) Save as IfcType -> Window (IfcElementType->IfcWindowType->Prdefinied type = WINDOW not LIGHTDOME)

   

   Step 4: Add 2d representation in Ifc Geometry (Plan/annotation/PLAN_VIEW)

   

   Step 5: While in 2d representation Join Objects (select IFC window last so not to override)

   

   Step 6: Delete the pre-generated 2d vertices and Position your drafted 2d view and Save Ifc while in 2d representation

   

   Save the project while in 2d repressentation:

   

   And you made a custom IfcType Well done!

   Your Ifc4 Demo library is found here on windows:

   C:\Users\YourUserName\AppData\Roaming\Blender Foundation\Blender\3.2\scripts\addons\blenderbim\bim\data\libraries

   Load it into your Ifc4 demo library:

   Step 1: open the Ifc4 demo library as an Ifc File not a library

   

   Step 2: Load your new IfcWindowType as a library

   

   

   Step 3: Save your Ifc4 demo library

   

   Well done you just added a custom IfcType to your Ifc4 Library!

   Open a new file with the library loaded to try it out!

   

   Hope that helps!

10. C by Coen on 5 Sep 2022 # +1 votes

    @Ace Thank you very much, :-D will try to follow your tutorial.

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