Lerp not working, probably quaternion?

lorizz12

Hello guys, I'm trying to make a smooth following vehicle camera and this is the code so far:

 Camera cam = World.RenderingCamera;
                        Entity target = playerVeh;
                        float damping = 1f; // used for smoothing the following camera, my DeltaTime is bugged, I don't know how to fix the jumping camera...
                        bool smoothRotation = true;
                        float rotationDamping = 1.0f;

                        cam.AttachTo(target, new Vector3(0f, -6f, 1.5f));
                        //cam.Position = Vector3.Lerp(cam.Position, wantedPosition, DeltaTime.getDeltaTime() * damping);
                        if (smoothRotation)
                        {
                            Quaternion wantedRotation = LookRotation(target.ForwardVector, target.UpVector);
                            cam.Rotation = Quaternion.Slerp(Quaternion.Euler(cam.Rotation), wantedRotation, DeltaTime.getDeltaTime() * rotationDamping).Axis;
                        }
                        else
                        {
                            cam.PointAt(target, new Vector3(0f, 5f, 0f));
                            cam.Rotation = new Vector3(cam.Rotation.X + (1 / playerVeh.SteeringAngle), cam.Rotation.Y, cam.Rotation.Z);
                            cam.MotionBlurStrength = playerVeh.Speed / 10;
                        }

The LookRotation method is the same as the one that unity3d uses, why is the camera not rotating? Also for the deltaTime, what is the best method to use in C#?
This is the DeltaTime class:

public static float deltaTime = 10f;
        public static float lastTime = Environment.TickCount;

        public DeltaTime()
        {
            this.Tick += onTick;
        }

        void onTick(object sender, EventArgs e)
        {
            var currentTick = Environment.TickCount;
            if (currentTick - lastTime >= 1000f)
            {
                lastTime = currentTick;
            }
            deltaTime = currentTick - lastTime;
        }

        public static float getDeltaTime()
        {
            return deltaTime / 1000f;
        }

I need help please! Thank you!