Hello,

I am attempting to use the AI script to create simple behaviors. When using the 'First Person Controller' as the target for the AI script to hunt down and attack, it works fine. When I use the AI characters themselves as the transform target for each other, they follow their Waypoint paths normally and do not attempt to attack each other or move toward each other. Has anyone attempted this or knows if their are sections in the AI script that require the First Person Controller as the target? Or are there inherent elements in the Character Controller that the AI script is communicating with?

I'm out of solutions :(

Thank you for reading my essay length question, Jansen

The code is from Unity's FPS tutorial:

 var speed = 3.0;
var rotationSpeed = 5.0;
var shootRange = 15.0;
var attackRange = 30.0;
var shootAngle = 4.0;
var dontComeCloserRange = 5.0;
var delayShootTime = 0.35;
var pickNextWaypointDistance = 2.0;
var target : Transform;

public var atDesk : boolean = false;

var useWaypointSet = 0;

private var lastShot = -10.0;

var pastroll : boolean = true;

// Make sure there is always a character controller
@script RequireComponent (CharacterController)

function Start () {
    // Auto setup player as target through tags
    if (target == null && GameObject.FindWithTag("Player"))
        target = GameObject.FindWithTag("Player").transform;



    if(useWaypointSet == 0)
    {
        Patrol();
    }
    else if(useWaypointSet == 1)
    {
        Patrolone();
    }
}

function Patrol () {
    var curWayPoint = AutoWayPoint.FindClosest(transform.position);
    while (true) {
        var waypointPosition = curWayPoint.transform.position;      

        // Are we close to a waypoint? -> pick the next one!
        if (Vector3.Distance(waypointPosition, transform.position) < pickNextWaypointDistance)
            curWayPoint = PickNextWaypoint (curWayPoint);

        // Attack the player and wait until
        // - player is killed
        // - player is out of sight     
        if (CanSeeTarget ())
            yield StartCoroutine("AttackPlayer");

        // Move towards our target
        MoveTowards(waypointPosition);

        yield;
    }
}

function Patrolone () {
    var curWayPoint = AutoWayPoint1.FindClosest(transform.position);
    while (pastroll) {
        var waypointPosition = curWayPoint.transform.position;
        // Are we close to a waypoint? -> pick the next one!
        if (Vector3.Distance(waypointPosition, transform.position) < pickNextWaypointDistance && atDesk == false)
            curWayPoint = PickNextWaypoint1 (curWayPoint);

        // Attack the player and wait until
        // - player is killed
        // - player is out of sight     
        if (CanSeeTarget ())
            yield StartCoroutine("AttackPlayer");

        // Move towards our target
        MoveTowards(waypointPosition);

        yield;
    }
}


function CanSeeTarget () : boolean {
    if (Vector3.Distance(transform.position, target.position) > attackRange)
        return false;

    var hit : RaycastHit;
    if (Physics.Linecast (transform.position, target.position, hit))
        return hit.transform == target;

    return false;
}

function Shoot () {
    // Start shoot animation
    animation.CrossFade("shoot", 0.3);

    // Wait until half the animation has played
    yield WaitForSeconds(delayShootTime);

    // Fire gun
    BroadcastMessage("Fire");

    // Wait for the rest of the animation to finish
    yield WaitForSeconds(animation["shoot"].length - delayShootTime);
}

function AttackPlayer () {
    var lastVisiblePlayerPosition = target.position;
    while (true) {
        if (CanSeeTarget ()) {
            // Target is dead - stop hunting
            if (target == null)
                return;

            // Target is too far away - give up 
            var distance = Vector3.Distance(transform.position, target.position);
            if (distance > shootRange * 3)
                return;

            lastVisiblePlayerPosition = target.position;
            if (distance > dontComeCloserRange)
                MoveTowards (lastVisiblePlayerPosition);
            else
                RotateTowards(lastVisiblePlayerPosition);

            var forward = transform.TransformDirection(Vector3.forward);
            var targetDirection = lastVisiblePlayerPosition - transform.position;
            targetDirection.y = 0;

            var angle = Vector3.Angle(targetDirection, forward);

            // Start shooting if close and player is in sight
            if (distance < shootRange && angle < shootAngle)
                yield;// StartCoroutine("Shoot");
        } else {
            yield StartCoroutine("SearchPlayer", lastVisiblePlayerPosition);
            // Player not visible anymore - stop attacking
            if (!CanSeeTarget ())
                return;
        }

        yield;
    }
}

function SearchPlayer (position : Vector3) {
    // Run towards the player but after 3 seconds timeout and go back to Patroling
    var timeout = 3.0;
    while (timeout > 0.0) {
        MoveTowards(position);

        // We found the player
        if (CanSeeTarget ())
            return;

        timeout -= Time.deltaTime;
        yield;
    }
}

function RotateTowards (position : Vector3) {
    SendMessage("SetSpeed", 0.0);

    var direction = position - transform.position;
    direction.y = 0;
    if (direction.magnitude < 0.1)
        return;

    // Rotate towards the target
    transform.rotation = Quaternion.Slerp (transform.rotation, Quaternion.LookRotation(direction), rotationSpeed * Time.deltaTime);
    transform.eulerAngles = Vector3(0, transform.eulerAngles.y, 0);
}

function MoveTowards (position : Vector3) {
    var direction = position - transform.position;
    direction.y = 0;
    if (direction.magnitude < 0.5) {
        SendMessage("SetSpeed", 0.0);
        return;
    }

    // Rotate towards the target
    transform.rotation = Quaternion.Slerp (transform.rotation, Quaternion.LookRotation(direction), rotationSpeed * Time.deltaTime);
    transform.eulerAngles = Vector3(0, transform.eulerAngles.y, 0);

    // Modify speed so we slow down when we are not facing the target
    var forward = transform.TransformDirection(Vector3.forward);
    var speedModifier = Vector3.Dot(forward, direction.normalized);
    speedModifier = Mathf.Clamp01(speedModifier);

    // Move the character
    direction = forward * speed * speedModifier;
    GetComponent (CharacterController).SimpleMove(direction);

    SendMessage("SetSpeed", speed * speedModifier, SendMessageOptions.DontRequireReceiver);
}

function PickNextWaypoint (currentWaypoint : AutoWayPoint) {
    // We want to find the waypoint where the character has to turn the least

    // The direction in which we are walking
    var forward = transform.TransformDirection(Vector3.forward);

    // The closer two vectors, the larger the dot product will be.
    var best = currentWaypoint;
    var bestDot = -10.0;
    for (var cur : AutoWayPoint in currentWaypoint.connected) {
        var direction = Vector3.Normalize(cur.transform.position - transform.position);
        var dot = Vector3.Dot(direction, forward);
        if (dot > bestDot && cur != currentWaypoint) {
            bestDot = dot;
            best = cur;
        }
    }

    return best;
}

function PickNextWaypoint1 (currentWaypoint : AutoWayPoint1) {
    // We want to find the waypoint where the character has to turn the least

    // The direction in which we are walking
    var forward = transform.TransformDirection(Vector3.forward);

    // The closer two vectors, the larger the dot product will be.
    var best = currentWaypoint;
    var bestDot = -10.0;
    for (var cur : AutoWayPoint1 in currentWaypoint.connected) {
        var direction = Vector3.Normalize(cur.transform.position - transform.position);
        var dot = Vector3.Dot(direction, forward);
        if (dot > bestDot && cur != currentWaypoint) {
            bestDot = dot;
            best = cur;
        }
    }

    return best;
}