Strange issue with Controller.Move and my rotation script

Questions & Answers
1

Hey Folks, got an interesting problem.

I'm working on an iPhone game and developing some customer controllers. The left joystick makes the control character both move and rotation toward the direction of the joystick points. The right joystick is just for rotation of the character around y so that the character can rotate in place while shooting. The code for rotation in the rightJoystick is very simple:

   function CharacterRotation()
{

    if (rightJoystick.position != Vector2.zero)
    {
        rotationAmount = (minRotationSpeed + maxRotationSpeed * rightJoystick.position.magnitude) * Time.deltaTime;
        aimVector = Vector3 (rightJoystick.position.x, 0, rightJoystick.position.y);
        aimRotation = Quaternion.LookRotation(aimVector - focus.transform.position, Vector3.up);
        focus.transform.rotation = Quaternion.Slerp(focus.transform.rotation,  aimRotation, rotationAmount );   

    }

}

focus is a Transform that is assigned to the character mesh.

When I start the game and move the right joystick everything works great. BUT, when I start with the left joystick and move the character and then go back to the right joystick, it doesn't rotate as expected. Instead, the character will rotate once in the exact opposite direction and then not rotate at all. I played around to see what was going on and I discovered that if I comment out the character.Move ( movement ) line in the left joystick script, the rightJoystick continues to work fine. Any idea what could be going on here that's causing the problem?

2

Your aimVector looks like it is just the joystick positions, with a range of (-1 -> 1, -1 -> 1). While you are at the origin (0,0,0), it will work as expected. As soon as you move away from the origin, the joystick position (that you are subtracting the transfrom.position from) is no long in the correct place [think joystick(1,1) minus position(34.2,-28.77)... what are you going to get as your vector?]. You need to add your present position to your joystick input before you subtract... or just use TransformDirection().