Oriented Bounding Box Hierarchies

Benjamin Bihler's picture
Benjamin Bihler
Mon, 04/29/2019 - 15:14
Forums: 
Modeling Data and Algorithms

If I have understood the source code documentation correctly, Open CASCADE supports only hierarchies of axis-aligned bounding boxes. Are there any plans to also implement hierarchies of oriented bounding boxes? Or has anyone done that yet with Open CASCADE?

Thank you.

Benjamin

Kirill Gavrilov's picture
Kirill Gavrilov
Mon, 04/29/2019 - 15:30

OCCT 7.3.0 introduced an algorithm (BRepBndLib::AddOBB) building a (tight) Oriented Bounding Box (Bnd_OBB) for the geometry.
Release notes also refer to experimental (and optional) usage of OBB in Boolean Operations, but I don't know details - I suppose there is no yet builders for hierarchy of such OBB:

In Boolean operations the oriented bounded boxes are available in experimental mode and can be turned on by a special option SetUseOBB(flag)

Benjamin Bihler's picture
Benjamin Bihler
Mon, 04/29/2019 - 15:42

Thank you, Kirill. I have already been using Open CASCADE OBBs. They work really well. What I am interested in (now) are especially hierarchies.

Rao Garimella's picture
Rao Garimella
Wed, 05/10/2023 - 01:24

I know this is an old thread and my reply is a bit off-topic but I am getting the wrong oriented bounding box for a sheet body with two faces. I posted on the forum but no one replied. Can you point me to the right place to get help? I am attaching the step file that caused the issue

Attachments: 
File wrongobb.tgz