I am using ggIFC to import ifc-models in to Rhino. Most of the times I just need the outer most geometry of the building body to calculate shading, meaning I do not need a complex file with one geometry for each element but rather the whole ifc as a single geometry object. is this possible to achieve using the plugin?
It’s an interesting question. A possible strategy could be using shrinkwrap, it would be helpful to reduce the elements to consider if it could restrict to say the external walls (if appropriately identified) and say curtainwalls and maybe floor slabs. Would a mesh be acceptable?
If you were willing to share a representative sample IFC file, I could take a look at this. You can send it privately.
i tried to import just the walls, slabs etc. but i found it more efficient to import the whole ifc-file, save as .3ds and use the .3ds as my shading object. i think using shrink wrap would take too much computer power and time compared to the 3ds method