void Update()
{
if (Time.time < delay)
{
return;
}
// if target is exist.
if (target)
{
// rotation facing to the target.
Quaternion targetlook = Quaternion.LookRotation(target.transform.position - this.transform.position);
this.transform.rotation = Quaternion.Lerp(this.transform.rotation, targetlook, Time.deltaTime * 3);
// find a direction from the target
Vector3 dir = (target.transform.position - transform.position).normalized;
float direction = Vector3.Dot(dir, transform.forward);
// check if in front direction
if (direction > 0.9f)
{
if (weapon)
{
// shooting!!.
weapon.LaunchWeapon(indexWeapon);
}
}
// AI attack the target for a while (3 sec)
if (Time.time > timeAIattack + 3)
{
target = null;
// AI forget this target and try to looking new target
}
}
else
{
for (int t = 0; t < TargetTag.Length; t++)
{
// AI find target only in TargetTag list
if (AirStrike.AIPool == null)
{
Debug.LogError("Need AIManager placed in this scene, please go to AirStrike/Prefabs/Game/AIManager and placing AIManager prefab to the scene");
return;
}
TargetCollector targetCollector = AirStrike.AIPool.FindTargetTag(TargetTag [t]);
if (targetCollector != null && targetCollector.Targets.Length > 0)
{
// find all objects in Tags list.
float distance = int.MaxValue;
for (int i = 0; i < targetCollector.Targets.Length; i++)
{
if (targetCollector.Targets [i] != null)
{
// find the distance from the target.
float dis = Vector3.Distance(targetCollector.Targets [i].transform.position, transform.position);
// check if in ranged.
if (distance > dis)
{
// Select closer target
distance = dis;
target = targetCollector.Targets [i];
if (weapon)
{
// random weapons
indexWeapon = Random.Range(0, weapon.WeaponLists.Length);
}
timeAIattack = Time.time;
}
}
}
}
}
}
}
void Update()
{
if (!flight)
{
return;
}
if (CenterOfBattle)
{
// CenterOfBattle is exist , BattlePosition = CenterOfBattle position
//in case of able you to changing the battle area
BattlePosition = CenterOfBattle.gameObject.transform.position;
}
// calculate target behavior.
TargetBehaviorCal();
// AI state machine
switch (AIstate)
{
case AIState.Patrol: // AI will free flying and looking for a target.
for (int t = 0; t < TargetTag.Length; t++)
{
if (AirStrike.AIPool == null)
{
Debug.LogError("Need AIManager placed in this scene, please go to AirStrike/Prefabs/Game/AIManager and placing AIManager prefab to the scene");
return;
}
TargetCollector targetCollector = AirStrike.AIPool.FindTargetTag(TargetTag [t]);
// Find only gameobject by Tag within TargetTag[]
if (targetCollector != null && targetCollector.Targets.Length > 0)
{
// get all objects as same tag as TargetTag[i]
float distance = int.MaxValue;
for (int i = 0; i < targetCollector.Targets.Length; i++)
{
if (targetCollector.Targets [i] != null)
{
// make it delay by TimeToLock
if (timetolockcount + TimeToLock < Time.time)
{
float dis = Vector3.Distance(targetCollector.Targets [i].transform.position, transform.position);
// selected closer target
if (DistanceLock > dis)
{
if (!Target)
{
// i random a bit because i want this AI look hesitate. so you can remove "Random.Range (0, 100) > 80" if you want this AI select every target.
if (distance > dis && Random.Range(0, 100) > 80)
{
distance = dis;
Target = targetCollector.Targets [i];
flight.FollowTarget = true;
// go to Attacking state
AIstate = AIState.Attacking;
// save current time
timestatetemp = Time.time;
// random weapon from the flight.WeaponControl.WeaponLists
WeaponSelected = Random.Range(0, flight.WeaponControl.WeaponLists.Length);
}
}
}
}
// shooting..
shootTarget(targetCollector.Targets [i].transform.position);
}
}
}
}
break;
case AIState.Idle: // Free state
// free fly and checking the AI is in of Battle Area
if (Vector3.Distance(flight.PositionTarget, this.transform.position) <= FlyDistance)
{
// go back to Patrol state
AIstate = AIState.Patrol;
timestatetemp = Time.time;
}
break;
case AIState.Attacking: // Attacking state
if (Target)
{
// if target is exist , Position target = target position
flight.PositionTarget = Target.transform.position;
// shoot the target..
if (!shootTarget(flight.PositionTarget))
{
if (attacking)
{
// if in attacking but cannot shoot anymore turn back in 5 sec
if (Time.time > timestatetemp + 5)
{
turnPosition();
}
}
else
{
// if no attacking turn back in 7 sec
if (Time.time > timestatetemp + 10)
{
turnPosition();
}
}
}
}
else
{
// if target is Destroyed go back to Patrol state
AIstate = AIState.Patrol;
// save current time
timestatetemp = Time.time;
}
// if going out of the Battle Area. Go back to the center (BattlePosition)
if (Vector3.Distance(BattlePosition, this.transform.position) > FlyDistance)
{
gotoCenter();
}
break;
case AIState.TurnPosition: // Turn back state
if (Time.time > timestatetemp + 7)
{
//try to turn to attacking again after 7 sec in case of Target still alive but you just turning out of shooting range
timestatetemp = Time.time;
AIstate = AIState.Attacking;
}
// if going out of the Battle Area. Go back to the center (BattlePosition)
if (Vector3.Distance(BattlePosition, this.transform.position) > FlyDistance)
{
gotoCenter();
}
// current target height Y
float height = flight.PositionTarget.y;
if (targetHavior == TargetBehavior.Static) // if static target
{
directionTurn.y = 0;
// calculate Position of bullet Drop and speed. try to make it accuracy
flight.PositionTarget += (this.transform.forward + directionTurn) * flight.Speed;
flight.PositionTarget.y = height;
flight.PositionTarget.y += flight.Speed / 2;
}
else
{
// calculate Position of bullet Drop and speed. try to make it accuracy
flight.PositionTarget += (this.transform.forward + directionTurn) * flight.Speed;
flight.PositionTarget.y = height;
flight.PositionTarget.y += flight.Speed / 2;
//flight.PositionTarget = BattlePosition + new Vector3 (Random.Range (-FlyDistance, FlyDistance), Random.Range (0, FlyDistance / 2), Random.Range (-FlyDistance, FlyDistance));
}
break;
}
if (Avoidance)
{
Vector3 directavoid = avoidDirection();
if (directavoid != Vector3.zero)
{
flight.FollowTarget = true;
flight.PositionTarget = this.transform.position + directavoid.normalized * AvoidChackDistance;
Debug.DrawLine(this.transform.position, flight.PositionTarget, Color.blue);
}
}
}