btVector3 position(1.0, 1.0, 1.0);
btVector3 velocity(3.0, 0.0, -4.0); velocity.normalize();
btVector3 force1(1.0, 0.0, 0.0); btVector3 force2(0.0, 1.0, 0.0); btVector3 totalForce = force1 + force2;These examples utilize the btVector3 class from the Bullet Physics library, which is typically used for physics simulations in games and other applications.