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I have a user's position in my game. I have a 3dof controller which moves my user in a 3d space.

I have 2 vectors cameraPosition and where to lookAt. Now for a simple case I have setup the position as follows:

    cameraPos=godObjPos;
    lookAt=godObjPos;
    cameraPos.x=godObjPos.x + 2;
    lookAt.x=godObjPos.x - 2;

enter image description here

How should I change the x and y cordinates of both cameraPos and lookAt to simulate the user turning his head towards left or right?

I set up the keyboard keys a and s to change the angle: a when pressed reduces the angle and s when pressed increases the angle.

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