Please help me with AI

Here's my code from a car AI I made. With a little adjustment for tank steering, it should work fine. Actually, you could simplify it a lot for a tank. Hope it works!

`//var target : Transform;

var waypoints : Transform[];

var frontLeftColl : Collider;

var frontRightColl : Collider;

var rearLeftColl : Collider;

var rearRightColl : Collider;

var armLeft : Transform;

var armRight : Transform;

var frontLeft : Transform;

var frontRight : Transform;

var rearLeft : Transform;

var rearRight : Transform;

var carCenter : Transform;

var steering = 0.00;

var graphicSteering = 0.00;

var angleDisplay = 0.00;

var engineTorque = 0.00;

var carAngle = 0.00;

var maxSpeed = 0.00;

var xDistance = 0.00;

var zDistance = 0.00;

var loop : boolean = false;

var targetWaypoint : int;

var waypointRadius = 0.00;

var angularDistance = 0.00;

function FixedUpdate () {

wheelRpm = frontLeftColl.rpm;

//Waypoint System target = waypoints[targetWaypoint];

xDistance = target.position.x - carCenter.position.x; zDistance = target.position.z - carCenter.position.z;

angularDistance = (Mathf.Sqrt(xDistance xDistance) + (zDistance zDistance));

if (angularDistance < waypointRadius){ targetWaypoint += 1; } if (loop == true){ if(targetWaypoint >= waypoints.Length){ targetWaypoint = 0; } } //targetwaypoint is a number.

//var targetDir = target.position - frontLeft.position;
//var forward = frontLeft.forward;
//var angle = Vector3.Angle(targetDir, forward);
/* carCenter.LookAt(target);

armRight.rotation = Quaternion.Slerp (armLeft.rotation, carCenter.rotation, Time.time 1); armLeft.rotation = Quaternion.Slerp (armLeft.rotation, carCenter.rotation, Time.time 1); frontLeftColl.steerAngle = carCenter.rotation.y; frontRightColl.steerAngle = carCenter.rotation.y; //steering = Quaternion.EulerRotation(target); //steering = blahBlah.rotation.y; //armRight.LookAt(steering);

*/

var angle : float = Mathf.Atan2(xDistance, zDistance) * Mathf.Rad2Deg;

carAngle = carCenter.eulerAngles.y; steering = (angle - carAngle); angleDisplay = angle;

frontLeftColl.steerAngle = steering; frontRightColl.steerAngle = steering;

graphicSteering = steering;

if (graphicSteering > 360){ graphicSteering -= 360; } if (graphicSteering < 0){ graphicSteering += 360; }

if (graphicSteering > 45){ if (graphicSteering < 315){ graphicSteering = 45; }} if (graphicSteering < 315){ if (graphicSteering > 45){ graphicSteering = 315; }}

armLeft.localEulerAngles.y = (graphicSteering); armRight.localEulerAngles.y = (graphicSteering);

if (frontLeftColl.rpm > maxSpeed){ finalTorque = 0; } if (frontLeftColl.rpm < maxSpeed){ finalTorque = engineTorque; }

frontLeftColl.motorTorque = finalTorque; frontRightColl.motorTorque = finalTorque;

frontLeft.Rotate(Vector3.right wheelRpm ( 360/60 ) Time.deltaTime); frontRight.Rotate(Vector3.right wheelRpm ( 360/60 ) Time.deltaTime); rearLeft.Rotate(Vector3.right wheelRpm ( 360/60 ) Time.deltaTime); rearRight.Rotate(Vector3.right wheelRpm ( 360/60 ) Time.deltaTime);

}`

Check this ETeeskiTutorials