I have a problem with the script.
I use the (AI), the FPS tutorial.
The script I use AI as a friend.
At first I specified in (var target: Transform) to attack enemies. be fore using Player i add Robot(enemy)
However okay, after the AI friend, kill the enemy, shows error, the friend AI stands.
Someone help me, for the (AI) friend, continue to attack and patrol.
Detecting the enemies (tags), and not by the object. (var target: Transform).
I have all enemies whit name tag (“enemies”)
error:
MissingReferenceException: The object of type ‘Transform’ has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.
UnityEngine.Transform.get_position () (at C:/BuildAgent/work/6bc5f79e0a4296d6/Runtime/ExportGenerated/Editor/BaseClass.cs:771)
NPCFollow.CanSeeTarget () (at Assets/Scripts/NPCFollow.js:52)
NPCFollow+$AttackPlayer$131+$.MoveNext () (at Assets/Scripts/NPCFollow.js:80)
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;
private var lastShot = -10.0;
// 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("enemy"))
target = GameObject.FindWithTag("enemy").transform;
Patrol();
}
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 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 play 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;
}