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Change origin of wall, to help in type changes?

  1. T by theoryshaw on 20 Jul 2023, edited 20 Oct 2023 # +1 votes

    Is there an approach, whereby you can move the origin of a wall to the middle, such that, when you change the underlying wall type of an instance--that has a different width--that it changes the width from this centerpoint?

  2. N by Nigel on 20 Jul 2023 #

    @theoryshaw We see this in other BIMware and it is really useful

  3. C by Coen on 21 Jul 2023, edited 21 Jul 2023 #

    What about this very hacky solution?

    Create an IfcWall with an ExtrudeProfile with an IfcRectulangurProfileDef, so this menu will appear:

    But if would be nice if the origin point could be set for vertical and horizontal layers too. But how would it then deal with multiple IfcMaterialLayers in an IfcWall?

  4. T by theoryshaw on 21 Jul 2023, edited 21 Jul 2023 # +2 votes

    There's this of course.

    Perhaps, when changing the type behind an instance, it takes the percentage of this OffsetFromReferenceLine distance to inform the new OffsetFromReferenceLine of the instance with the new type.

    Existing wall thickness = 0.1

    OffsetFromReferenceLine = -0 .05

    Percentage = -50%

    wall thickness of new type = 0.2

    OffsetFromReferenceLine of wall with new type = (0.2 * -50%) = -.1

  5. G by Gorgious on 22 Jul 2023 #

    Isn't OffsetFromReferenceLine defined at type level rather than instance level ? If so I think you'd have to define all your wall types to be centered around the axis.

  6. B by brunopostle on 22 Jul 2023 #

    @Gorgious it is the opposite, a IfcMaterialLayerSetUsage can only apply to an instance (this is an IFC annoyance)

  7. T by theoryshaw on 22 Jul 2023 #

    I think it's an instance attribute of IfcMaterialLayerSetUsage

    The IfcMaterialLayerSetUsage is always assigned to an individual occurrence object

    Seems to work that way in BB, as well.

  8. T by theoryshaw on 22 Jul 2023 #

    Also too, i think it would be great when you change the OffsetFromReferenceLine of a wall it only moves the origin, and not the wall.

    Currently it keeps the origin in the same place, and moves the wall.

  9. T by theoryshaw on 20 Oct 2023 #

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