Function b2World_CastMover 

pub unsafe extern "C" fn b2World_CastMover(
    worldId: b2WorldId,
    mover: *const b2Capsule,
    translation: b2Vec2,
    filter: b2QueryFilter,
) -> f32

Cast a capsule mover through the world. This is a special shape cast that handles sliding along other shapes while reducing clipping.