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

examples3d/platform3.rs

@@ -72,7 +72,7 @@ pub fn init_world(testbed: &mut Testbed) {
         }
 
         if let Some(mut platform) = physics.bodies.get_mut(platform_handle) {
-            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;