Tilting an Object while it Moves

Questions & Answers
1

My game involves a plane, controlled using input.acceleration for the iPhone, that moves left and right to avoid buildings. Moving the plane is not an issue, however when i add the code to make it tilt, the plane starts to move down on the y-axis. I have no idea what’s going on. This problem does not occur without the code to tilt. Any and all help would be much appreciated! My code is as follows:

    Vector3 dir = Vector3.zero;
	dir.x = Input.acceleration.x;

	if (dir.sqrMagnitude > 1)
	{
		dir.Normalize ();
	}
	dir = dir * Time.deltaTime;

	transform.Translate(dir * speed);

//this part is the code i add to tilt the plane i.e. where the error occurs

	Vector3 movement = new Vector3 (dir.x, 0.0f, 0.0f);
	rigidbody.velocity = movement * speed;
	rigidbody.rotation = Quaternion.Euler (0.0f, 0.0f, rigidbody.velocity.x * -tilt);

All variables, such as tilt and speed, have been previously initialized as public variables and are manipulated in the game controller. Thanks again for the help!

2

The problem is that Transform.Translate() uses local coordinates. That is, in your case, it moves to the objects left regardless of how it is angled. You can fix this in a couple of different ways. You can add the Space.World parameter to the Translate():

transform.Translate(dir * speed, Space.World);

Or you can move it by directly accessing transform.position:

transform.position += dir * speed;