Add explicit wake_up parameter to method setting the position and velocity of a rigid-body.

examples2d/platform2.rs

@@ -62,7 +62,7 @@ pub fn init_world(testbed: &mut Testbed) {
      */
     testbed.add_callback(move |_, physics, _, _, time| {
         let mut platform = physics.bodies.get_mut(platform_handle).unwrap();
-        let mut next_pos = platform.position;
+        let mut next_pos = *platform.position();
 
         let dt = 0.016;
         next_pos.translation.vector.y += (time * 5.0).sin() * dt;