moveDirection may need to be a new Vector3 I am not positive on when and when not to use new. (thats my research project to night I guess)

Upon further thinking about this. are you sure your not wanting to flip the object the other direction because the Vector3 is referring to its translation. where if you want the cube to basically flip 180 degrees then in that case you would basically do the same code but ins$$anonymous$$d of a Vector3.

I got you a reference video from the unity archives.
the part where he is flipping his character based on key inputs is at $$anonymous$$ute 39. just taylor the code to fit your needs and make it flip when it hits the wall and not based on keys.

http://unity3d.com/learn/tutorials/modules/beginner/2d/2d-controllers

(also note I know your working in 3d and the video is on 2d but the concept should be similar. if its not I am sure one of the more seasoned programmers will let us know where we both are going wrong)

Hello oasisunknown, sorry by my delay to answer. i'm watching the video you have suggested to me and i will try to adapt that to my game. Thanks for the help, I'll get back later to say if it's working :)

You believe that this simple script solve my problem? I just change the line "direction.z *= -1;" for "transform.Rotate(0,180,0);" I put this here, maybe someone is having the same problem. :)

pragma strict

/ This is our direction we're travelling in. var direction = Vector3(0, 0, 1);

// $$anonymous$$ove it along its direction. function Update () { transform.Translate(direction 7 Time.deltaTime); }

// If we hit a left or right wall, invert x direction. function OnCollisionEnter (hit : Collision) { var tag = hit.gameObject.tag;
if (tag == "parede") transform.Rotate(0,180,0);

}