koobas.hobune.stream
Detecting if two meshes intersect, precisely
I'm trying to gather all GameObjects a specific object intersects with. At the moment I'm using a broad sweep:
Collider[] colliders = Physics.OverlapSphere(latestObject.collider.bounds.center, latestObject.collider.bounds.extents.magnitude);
But as I understand it, this uses a bounding sphere around each object to test for overlap, and so it may not be very precise. I'd like to then check each returned object with a more precise approach. Is there an easy built in way to check one object against another more precisely? Or do I have to literally manually go into the meshes and do triangle<->triangle intersection tests?
Thanks for any help!
If your objects are convex and do not have more than 255 tris you can use the mesh collider to check for collision (intersection).
Thanks for the answer Gerry - unfortunately I cannot rely on my objects being convex.
I should note also that I don't need any information about the collision/overlap, except that it has happened...if that simplifies the problem.
I'm beginning to think I'll have to look at my own triangle-to-triangle intersection function? :/
Thanks, just wanted to make sure I wasn't reinventing any wheels.
Very useful link too - cheers Bunny83!
