Fast continuous sphere-box test

[Francisco Garcia]

Hi!

I'm working in a Lagrangian real-time physics module and I need a fast continuous sphere-oriented box test (box with constant linear & angular speed in interval) ¿any reference?

Thanks!

[Erwin Coumans]

Hi!

I'm working in a Lagrangian real-time physics module and I need a fast continuous sphere-oriented box test (box with constant linear & angular speed in interval) ¿any reference?

Thanks!

For a continuous sphere versus box test, with constant linear and angular velocity, you can use the Conservative Advancement method. You can read about the concept in the FAST and CATCH papers on continuous collision detection. Brian Mirtich and Gino van den Bergen also discuss this approach, see the references.

You can see an implementation in the open source Bullet physics engine, in btContinuousConvexCollision. See bullet/Demos/ContinuousConvexCollision, and replace one of the moving boxes by a sphere shape (the method works for general convex shapes, not just spheres and boxes).

Hope this helps,
Erwin

[Francisco Garcia]

Ok...It's that all I need....Thank you very much!!