Relational BIM Objects

daveedwards

Does BricsCAD BIM support Relational Modeling of Building Components? In other words, is there a hierarchical link between things like a Wall and Doors and Windows placed in the Wall? What happens with a Wall containing Doors and Windows is Moved, Copied or Deleted? What happens when a Level is moved?

Louis_Verdonck

In BricsCAD BIM components, such as doors, windows, are placed in a 'parent' solid. When the parent solid is manipulated, the components owned by the solid are manipulated along.

daveedwards

@Louis Verdonck said:
In BricsCAD BIM components, such as doors, windows, are placed in a 'parent' solid. When the parent solid is manipulated, the components owned by the solid are manipulated along.

And is this another "Not In Shape" design decision?

Louis_Verdonck

What do you mean be 'Not in Shape'?

daveedwards

@Louis Verdonck said:
What do you mean be 'Not in Shape'?

In Shape - BIM Copy will copy the wall but not the Doors in the Wall - or is that a different command?

Jason Bourhill

@daveedwards said:
Does BricsCAD BIM support Relational Modeling of Building Components? In other words, is there a hierarchical link between things like a Wall and Doors and Windows placed in the Wall? What happens with a Wall containing Doors and Windows is Moved, Copied or Deleted? What happens when a Level is moved?

Sometimes objects can lose their associativity to each other. You can re-associate by using BMUPDATE. You can also break associativity by using BMUNLINK. It would be useful if you could visualise these links somehow. E.g. in the Structure/Mechanical browser you can see a wall that has a door and window linked to it.

BricsCAD is primarily a direct modeller, with the emphasis on giving you the freedom to model what you want were you want. You can impose hierarchy if you want. e.g.

• You can break building levels up into separate .dwg files, then xref them into an assembly of the whole building. This in turn could be xrefed into a building site consisting of multiple buildings.
• You can use 3D Constraints to control how objects behave, such as the distance between two walls.

I believe the trick with BricsCAD is to apply just enough hierarchy to get the result that you want, don't waste time trying to control everything. In BricsCAD the editing tools are good enough to quickly change a model. This video of working with a hip roof is an example. Manipulating the model was done purely using editing tools.

Following on with this philosophy you might use PARAMETRIZE to quickly constrain a solid, make some changes, then delete all these constraints from the mechanical browser to return it to a simple solid.

Regards,
Jason Bourhill
CAD Concepts

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