Brep within a Brep

Hi! Is there an easy component that tests whether a brep is completely enclosed, intersecting, outside another brep? Assuming both are closed.

If not, what would be the steps to test that while still maintaining the structure at the end? If I deconstruct all the breps and test it vertice by vertice?

Thanks,

Tim

Replies to This Discussion

Permalink Reply by David Rutten on November 15, 2014 at 7:28am

Hi Tim,

there's not as far as I know. It's not good enough to only test vertices, or even just edges, you'll have to perform the expensive intersection.

The steps required are such:

Test for intersections. If you find any, you know they are intersecting, if there are no intersections, it's either A-inside-B, B-inside-A or they are not nested.
Test a point on A for inclusion in B. If it's inside, the entire brep A will be inside B.
Test a point on B for inclusion in A. If it's inside, the entire brep B will be inside A. If it's outside, A and B are completely disjoint.

Permalink Reply by Tim Chen on November 19, 2014 at 4:35am