public override void ApplyImpulse(BulletBody pBody, Vector3 imp, Vector3 pos)
{
RigidBody body = (pBody as BulletBodyXNA).rigidBody;
IndexedVector3 impiv3 = new IndexedVector3(imp.X, imp.Y, imp.Z);
IndexedVector3 posiv3 = new IndexedVector3(pos.X, pos.Y, pos.Z);
body.ApplyImpulse(ref impiv3, ref posiv3);
}