What exactly does Convex Cast return?

[Marc]

Because it is a convex cast, it will find the first body along teh trajectory that his the casting shape.

Ah I meant with t the return value of the NewtonWorldRayFilterCallback because that's somehow the time traveled along the raycast. So I can't do an all body cast with convex cast as I can with the raycast because the convex cast only returns contacts for the first body.

[Marc]

Is there a way to get the type of contact from the result of a NewtonWorldConvexCast? With type I mean if the collision is with a face, edge or point.

[Julio Jerez]

that will be complicated because not all collision are made from polygonal shapes.
In fact most convex shapes come from the equation of a conic shape.

[Marc]

Hmm I see.

Is it tunneling safe? In the sense that when the start and destination position are very far apart and inbetween is something, will it hit it or are only start and destination position considered?