Box2D Forums

Hi. First off: nice library.

But to the subject: when a collision occurs, one can get the direction of the manifolds of a contact as normal vectors. I'm sure this should be a stupid question, but I can't see anywhere public which allows access to the magnitude of the collision. How could this be done?

Example use case: when a vehicle hits solid geometry, apply damage proportional to the inertia. (For a two-dynamic-objects case, think spaceship and asteroid.)

Thanks!

In Box2D 2.0, the collision listener returns the contact force.

Ah, right. Time to update, then. Thanks.