[Blender] Cross sections

edited June 25 in General

Hi and thank you for accepting me in your group!
Is there a script to use only the cross-section system of the Blender-BIM add-on, within a normal .blend file?

Tagged:
Bedson

Comments

  • I think that since the whole BlenderBim add-on relies on the IFC schemas and ecosystem you can't really take advantage of the tools without actual IFC elements and drawing parameters. You didn't specify what your actual needs are so it's a wild guess, but you can try out the default Bisect tool in edit mode. You can use it on multiple objects too.

    (It's bugging out at the end because Suzanne's mesh is non-manifold)

  • Is it possible to select and object, which creates a sectioning Bounding Box around the object?

  • Yes indeed the BlenderBIM Add-on's temporary section cutaway feature works on regular Blender meshes and actually has nothing to do with IFC. The only caveat is that it works using shader tricks, so you have to be in material preview or rendered viewport mode to see the results. It also therefore relies on normals being correct.

    To create a section bounding box, just create multiple sectioning planes. All planes are independent and you can have as many or as little as you want. It might be a nice feature to build a tool where you can create a sectioning box with one click, instead of the 10 clicks it takes right now.

    CoenArEhsanC
  • You may use collection boolean feature in blender 3.0, basically using whole collection as operand and simple box as cutter. While slower than shader trick, it will provide support for shadows.

    CoenBedson
  • @Moult

    It might be a nice feature to build a tool where you can create a sectioning box with one click, instead of the 10 clicks it takes right now.

    Has there been any progress so far? :-)

  • edited June 24

    Hi @Coen @Moult
    You may want to try the add-on made for the atlas of anatomy:
    https://www.z-anatomy.com/
    I got the same idea as you and tried to 'stick' (parent) six planes of these on a cube.
    It worked for five of them but I never achieved to have the sixth one.
    It was very close to the solution that you want, though, and I'd be glad if someone could finish it.
    I should still have the file used for the experiment.
    Would you like to try?

    Coen
  • To create a section bounding box, just create multiple sectioning planes. All planes are independent and you can have as many or as little as you want.

    Did you ever achieve to use more than 5?

  • Just curious if anyone found a workflow for modeling detailing in section boxes with BlenderBIM? for example with Revit you could select and object, hit a shortcut key and it would create a bounding box around that object which was a section box. Then the section box was the main pivot/orbit point. It's an extremely useful feature, I used it a lot.

  • @Coen said:
    Just curious if anyone found a workflow for modeling detailing in section boxes with BlenderBIM? for example with Revit you could select and object, hit a shortcut key and it would create a bounding box around that object which was a section box. Then the section box was the main pivot/orbit point. It's an extremely useful feature, I used it a lot.

    For what you want it sounds like isolating the object would work? It's a normal Blender Feature:

    Press shift H with the object selected and it hides the rest of the scene

    It doesn't have a section box but I think it can get you closer to that functionality

  • Thanks, I know about al+H. It's useful, but someone here describes it exactly as I want:

    https://blender.community/c/rightclickselect/W3fbbc/?sorting=hot

    theoryshawAce
  • @Coen hehe I think you know that "someone" :)

    CoenAce
  • edited November 17

    @Ace said:

    @Coen said:
    Just curious if anyone found a workflow for modeling detailing in section boxes with BlenderBIM? for example with Revit you could select and object, hit a shortcut key and it would create a bounding box around that object which was a section box. Then the section box was the main pivot/orbit point. It's an extremely useful feature, I used it a lot.

    For what you want it sounds like isolating the object would work? It's a normal Blender Feature:

    Press shift H with the object selected and it hides the rest of the scene

    It doesn't have a section box but I think it can get you closer to that functionality

    I join in this reflection. I don't like shift H because it really changes the visibility status of items in the Outliner. I find the § shortcut more powerful because it isolates the selection and zooms in on it, then you can return to the previous view with the same shortcut.
    It would be great to develop this shortcut to behave like Revit's HH, HI (hide/isolate selection) and HC and IC (hide/isolate all elements of the same type as the selection) shortcuts. Finally HR to redisplay everything. I use them a lot and miss them in BlenderBIM

  • There is this add-on that I saw the other day, but I didn't get to test it:

    NigelCadGiruArvcarlopavArEhsanC
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