Extract exterior box of IFC 3D model

Hi,

It really depends on if your IFC contains an existing bounding box shape you want to extract or if you want to make a new bounding box. If you want to make a new bounding box you can use the BoundingBoxReplacer and set the "Replace with" setting to 3D Bounding Cube.

Thank you for your reply. Indeed, I tested this transformer but it creates a whole cube which is not correct

That is correct, it is a bounding box. I see you are converting your geometry into a pointcloud, is there a reason to do that? (or did the bounding box replacer not work on your geometry type?)

Apparently there is a new transformer in FME 2022(or downloadable on the FME hub for older FME versions) named SolidDissolver which might be able to combine all your geometry into 1 feature but I suspect that this transformer might be very particular with the geometry types it accepts.

Another option is to create a collection with an aggregator but features that are inside another feature will continue to exist making it kind of messy, but it is easy to generate

Your question is a difficult one because I think FME is still struggling with 3D Geometry Boolean operations but maybe somebody else has another idea.

Thank you for your answer, however for the old screenshot I followed an answer from someone who advised to go through the point clouds but it did not work. Testing the new transformer here is the error message that tells me.