/// <summary>
/// Updates the target situation to take cover. Returns true if a cover was found.
/// </summary>
public static bool TakeCover(AIController controller, ref AISituation situation)
{
var currentVectorToTarget = situation.ThreatGroundPosition - situation.CurrentPosition;
var currentDistanceToTarget = currentVectorToTarget.magnitude;
Cover result = null;
float resultPathDistance = 0;
int resultDirection = 0;
Vector3 resultPosition = situation.CurrentPosition;
var path = new NavMeshPath();
var corners = new Vector3[32];
var isAlreadyTooClose = currentDistanceToTarget <= controller.Distances.MinEnemy || currentDistanceToTarget <= controller.Cover.MinCoverToEnemyDistance;
var covers = new List <CoverItem>();
foreach (var collider in Physics.OverlapSphere(controller.transform.position, controller.Cover.MaxDistance, 0x1 << 8, QueryTriggerInteraction.Collide))
{
if (!collider.isTrigger)
{
continue;
}
var cover = CoverSearch.GetCover(collider.gameObject);
if (cover == null || cover == situation.CurrentCover)
{
continue;
}
var item = new CoverItem();
item.Cover = cover;
item.IsTall = cover.IsTall(controller.Motor.CoverSettings.TallThreshold);
if (item.IsTall)
{
item.Direction = cover.ClosestCornerTo(situation.CurrentPosition, controller.Motor.CoverSettings.CornerAimTriggerDistance, out item.Point);
}
else
{
item.Point = cover.ClosestPointTo(situation.CurrentPosition, controller.Motor.CoverSettings.LowSideEnterRadius, 0.3f);
}
if (float.IsNaN(item.Point.x) || float.IsNaN(item.Point.z))
{
continue;
}
item.Point.y = cover.Bottom;
item.Distance = Vector3.Distance(controller.transform.position, item.Point);
covers.Add(item);
}
foreach (var item in covers.OrderBy(o => o.Distance))
{
var isTall = item.IsTall;
var cover = item.Cover;
var point = item.Point;
var coverDirection = item.Direction;
if (!AIUtil.IsGoodAngle(controller, cover, point, situation.ThreatGroundPosition, isTall))
{
continue;
}
var distanceToTarget = Vector3.Distance(situation.ThreatGroundPosition, point);
if (distanceToTarget < controller.Distances.MinEnemy ||
distanceToTarget < controller.Cover.MinCoverToEnemyDistance)
{
continue;
}
if (situation.CurrentCover != null && Vector3.Distance(situation.CurrentPosition, point) < controller.Cover.MinSwitchDistance)
{
continue;
}
if ((controller.Health == null || controller.Health.Health > controller.Fighting.MinHealth))
{
if (isTall)
{
Vector3 aimPoint;
coverDirection = cover.ClosestCornerTo(point, -controller.Motor.CoverSettings.CornerOffset.x, out aimPoint);
if (!AIUtil.IsInSight(controller, aimPoint, situation.ThreatStandingTopPosition))
{
continue;
}
}
else if (!AIUtil.IsInSight(controller, point, situation.ThreatStandingTopPosition))
{
continue;
}
}
var distanceToOrigin = Vector3.Distance(situation.CurrentPosition, point);
if (situation.CurrentCover == null)
{
if (distanceToOrigin > controller.Cover.MaxDistance)
{
continue;
}
}
else
if (distanceToOrigin > controller.Cover.MaxSwitchDistance)
{
continue;
}
var areThereFriends = false;
{
var hasChangedPosition = false;
Vector3 side;
if (Vector3.Dot((point - situation.CurrentPosition).normalized, cover.Right) > 0)
{
side = cover.Right;
}
else
{
side = cover.Left;
}
do
{
hasChangedPosition = false;
if (AIUtil.IsCoverPositionTooCloseToFriends(cover, controller, point))
{
var next = point + side * 0.5f;
if (cover.IsInFront(next, false))
{
point = next;
hasChangedPosition = true;
}
else
{
areThereFriends = true;
}
}
}while (hasChangedPosition);
}
if (areThereFriends)
{
continue;
}
var isOk = false;
NavMesh.CalculatePath(situation.CurrentPosition, point, NavMesh.AllAreas, path);
float pathDistance = 0f;
var count = path.GetCornersNonAlloc(corners);
if (count < 2)
{
continue;
}
var isTooCloseToEnemy = false;
for (int i = 1; i < count; i++)
{
pathDistance += Vector3.Distance(corners[i - 1], corners[i]);
if (!isAlreadyTooClose)
{
if (Util.DistanceToSegment(situation.ThreatGroundPosition, corners[i - 1], corners[i]) <= controller.Distances.MinPassing)
{
isTooCloseToEnemy = true;
break;
}
}
}
if (isTooCloseToEnemy)
{
continue;
}
if (situation.CurrentCover == null)
{
isOk = result == null || pathDistance < resultPathDistance;
}
else if (controller.Health == null || controller.Health.Health > controller.Fighting.MinHealth)
{
isOk = (isAlreadyTooClose || distanceToTarget < currentDistanceToTarget) &&
(result == null || pathDistance < resultPathDistance);
}
else
{
isOk = distanceToTarget > currentDistanceToTarget && (result == null || pathDistance < resultPathDistance);
}
if (isOk)
{
result = cover;
resultPosition = point;
resultPathDistance = pathDistance;
resultDirection = coverDirection;
break;
}
}
situation.TargetDirection = resultDirection;
if (result == null)
{
if (situation.IsThreatInCover)
{
ApproachACovered(controller, ref situation);
}
else
{
ApproachAFree(controller, ref situation, controller.Agent, controller.Distances.MaxWalkingFight, true);
}
return(false);
}
else
{
situation.IsNewCover = true;
situation.TargetCover = result;
situation.TargetPosition = resultPosition;
return(true);
}
}
/// <summary>
/// Returns an updated situation struct.
/// </summary>
public void Update(AIController controller, AISituation previous, bool updateInDetail)
{
if (!IsAlerted)
{
HasInvestigatedTheLatestAlert = false;
}
else if (Threat == null & Vector3.Distance(CurrentPosition, ThreatGroundPosition) < controller.Distances.ThreatInvestigation)
{
MarkInvestigated();
}
if (HasAnInvestigatedAlert)
{
InvestigatedAlertAge += Time.deltaTime;
}
// Check grenades
{
IsNearGrenade = false;
float minDist = 1000;
foreach (var grenade in GrenadeList.All)
{
var vec = grenade.transform.position - controller.transform.position;
var dist = vec.magnitude;
if (dist < grenade.ExplosionRadius)
{
if (!IsNearGrenade || dist < minDist)
{
minDist = dist;
IsNearGrenade = true;
NearestGrenadePosition = grenade.transform.position;
if (Threat == null)
{
HasInvestigatedTheLatestAlert = false;
HasAnInvestigatedAlert = false;
ThreatGroundPosition = grenade.transform.position;
}
}
}
}
}
// Check friends and enemies.
if (Threat == null || (!IsAlerted && !IsGettingAlerted))
{
var minEnemyInfoTimer = controller.View.EnemySustainTime;
foreach (var actor in Actors.All)
{
if (actor != controller.Actor)
{
if (actor.Side != controller.Actor.Side)
{
if (AIUtil.IsInSight(controller, actor.TopPosition))
{
IsAlerted = true;
ReadEnemyState(actor);
break;
}
}
else if (actor.AI != null && actor.AI.IsAlerted)
{
var vector = actor.transform.position - controller.transform.position;
if (vector.magnitude < controller.View.CommunicationDistance)
{
IsAlerted = true;
if (actor.AI.Situation.NoThreatTimer < actor.AI.View.EnemySustainTime &&
minEnemyInfoTimer > actor.AI.Situation.NoThreatTimer)
{
TakeEnemyState(actor.AI);
}
}
}
}
}
}
// Check friends if they had investigated the same position
if (IsAlerted && Threat == null && !HasInvestigatedTheLatestAlert)
{
foreach (var friend in Actors.All)
{
if (friend != controller.Actor &&
friend.Side == controller.Actor.Side &&
friend.AI.IsAlerted &&
friend.AI.Situation.HasAnInvestigatedAlert &&
friend.AI.Situation.InvestigatedAlertAge < 10 &&
Vector3.Distance(friend.transform.position, controller.transform.position) < controller.View.CommunicationDistance &&
Vector3.Distance(friend.AI.Situation.InvestigatedThreatPosition, ThreatGroundPosition) < controller.Distances.ThreatInvestigation)
{
MarkInvestigated();
break;
}
}
}
// Check threats
if (Threat == null)
{
var minDist = 100000f;
foreach (var alert in Alerts.All)
{
var dist = Vector3.Distance(controller.transform.position, alert.Position);
if (dist < alert.Range)
{
if (dist < minDist)
{
minDist = dist;
IsAlerted = true;
ThreatGroundPosition = alert.Position;
HasAnInvestigatedAlert = false;
HasInvestigatedTheLatestAlert = false;
}
}
}
}
// React to grenades
if (IsNoticingGrenade)
{
if (GrenadeReaction < float.Epsilon)
{
IsNoticingGrenade = false;
}
else
{
GrenadeReaction -= Time.deltaTime;
IsNearGrenade = false;
}
}
else if (IsNearGrenade && !previous.IsNearGrenade)
{
GrenadeReaction = controller.Fighting.GrenadeReactionTime;
IsNoticingGrenade = true;
IsNearGrenade = false;
}
if (IsNearGrenade)
{
IsAlerted = true;
}
// React to being alerted.
if (IsGettingAlerted)
{
if (AlertReaction < float.Epsilon)
{
IsGettingAlerted = false;
IsAlerted = true;
}
else
{
AlertReaction -= Time.deltaTime;
IsAlerted = false;
}
}
else if (IsAlerted && !previous.IsAlerted)
{
AlertReaction = controller.Fighting.ReactionTime;
IsGettingAlerted = true;
IsAlerted = false;
}
if (previous.TargetCover != null &&
(controller.Motor.LeftCover == previous.TargetCover || controller.Motor.RightCover == previous.TargetCover || controller.Motor.Cover == previous.TargetCover))
{
CurrentCover = previous.TargetCover;
}
else
{
CurrentCover = controller.Motor.Cover;
}
CurrentPosition = controller.transform.position;
IsGunReady = controller.Motor.IsGunReady && controller.Motor.Gun.Clip >= controller.Motor.Gun.ClipSize * controller.Fighting.ReloadFraction;
if (controller.Health != null && Threat != null && Threat.IsAttacking)
{
IsRetreating = IsAlerted && controller.Health.Health <= controller.Fighting.MinHealth;
}
else
{
IsRetreating = false;
}
if (IsAlerted)
{
var couldSeeTheEnemy = CanSeeTheThreat;
CanSeeTheThreat = false;
if (Threat != null)
{
if (couldSeeTheEnemy || updateInDetail)
{
CanSeeTheThreat = AIUtil.IsInSight(controller, Threat.TopPosition);
}
if (CanSeeTheThreat)
{
ReadEnemyState(Threat);
}
else
{
NoThreatTimer += Time.deltaTime;
if (updateInDetail)
{
// Check friends and enemies.
foreach (var friend in Actors.All)
{
if (friend != controller.Actor &&
friend.Side == controller.Actor.Side &&
friend.AI != null &&
friend.AI.IsAlerted &&
friend.AI.Situation.CanSeeTheThreat &&
friend.AI.Situation.Threat == Threat)
{
var vector = friend.transform.position - controller.transform.position;
if (vector.magnitude < controller.View.CommunicationDistance)
{
TakeEnemyState(friend.AI);
}
}
}
}
}
}
if (TargetCover != null && updateInDetail)
{
var distanceToThreat = Vector3.Distance(TargetPosition, ThreatGroundPosition);
IsTargetCoverGood = distanceToThreat >= controller.Distances.MinEnemy &&
distanceToThreat >= controller.Cover.MinCoverToEnemyDistance &&
AIUtil.IsGoodAngle(controller,
TargetCover,
TargetPosition,
ThreatGroundPosition,
TargetCover.IsTall(controller.Motor.CoverSettings.TallThreshold)) &&
!AIUtil.IsCoverPositionTooCloseToFriends(TargetCover, controller, TargetPosition);
}
if (updateInDetail)
{
if (TargetCover != null && TargetCover.IsTall(controller.Motor.CoverSettings.TallThreshold))
{
Vector3 aimPoint;
if (TargetDirection < 0)
{
aimPoint = TargetCover.LeftCorner(0, controller.Motor.CoverSettings.CornerOffset.x);
}
else
{
aimPoint = TargetCover.RightCorner(0, controller.Motor.CoverSettings.CornerOffset.x);
}
CanSeeFromTargetPosition = AIUtil.IsInSight(controller, aimPoint, ThreatStandingTopPosition);
}
else
{
CanSeeFromTargetPosition = AIUtil.IsInSight(controller, TargetPosition, ThreatStandingTopPosition);
}
}
}
else
{
if (TargetCover != null && updateInDetail)
{
IsTargetCoverGood = !AIUtil.IsCoverPositionTooCloseToFriends(TargetCover, controller, TargetPosition);
}
CanSeeFromTargetPosition = true;
}
}
/// <summary>
/// Returns an updated situation struct.
/// </summary>
public void Update(AIController controller, AISituation previous, bool updateInDetail)
{
if (!IsAlerted)
{
HasInvestigatedTheLatestAlert = false;
}
else if (!HasInvestigatedTheLatestAlert && Vector3.Distance(CurrentPosition, InvestigationPosition) < controller.Distances.ThreatInvestigation)
{
MarkInvestigated();
}
if (HasAnInvestigatedAlert)
{
InvestigatedAlertAge += Time.deltaTime;
}
if (IsIrritated)
{
if (IrritationTime > controller.Fighting.Irritation)
{
IrritationTime = 0;
IsIrritated = false;
}
else
{
IrritationTime += Time.deltaTime;
}
}
else
{
IrritationTime = 0;
}
// Check grenades
{
IsNearGrenade = false;
float minDist = 1000;
foreach (var grenade in GrenadeList.All)
{
var vec = grenade.transform.position - controller.transform.position;
var dist = vec.magnitude;
if (dist < grenade.ExplosionRadius)
{
if (!IsNearGrenade || dist < minDist)
{
minDist = dist;
IsNearGrenade = true;
NearestGrenadePosition = grenade.transform.position;
if (Threat == null)
{
HasInvestigatedTheLatestAlert = false;
HasAnInvestigatedAlert = false;
IsThreatPositionANewAlert = true;
SetThreatPosition(grenade.transform.position, true);
}
}
}
}
}
// Check friends and enemies.
if (Threat == null || (!IsAlerted && !IsGettingAlerted))
{
foreach (var actor in Actors.All)
{
if (actor != controller.Actor)
{
if (actor.Side != controller.Actor.Side)
{
if (AIUtil.IsInSight(controller, actor.TopPosition))
{
IsAlerted = true;
ReadEnemyState(actor);
break;
}
}
else if (actor.AI != null && actor.AI.IsAlerted)
{
var vector = actor.transform.position - controller.transform.position;
if (vector.magnitude < controller.View.CommunicationDistance)
{
IsAlerted = true;
if (actor.AI.State != AIState.investigate)
{
if (actor.AI.Situation.Threat != null && actor.AI.Situation.HasBetterThreatInfo(actor.AI, ref this))
{
TakeEnemyState(actor.AI);
break;
}
}
}
}
}
}
}
// Check friends if they had investigated the same position
if (IsAlerted && !HasInvestigatedTheLatestAlert)
{
foreach (var friend in Actors.All)
{
if (friend != controller.Actor &&
friend.Side == controller.Actor.Side &&
friend.AI != null &&
friend.AI.IsAlerted &&
friend.AI.Situation.HasAnInvestigatedAlert &&
friend.AI.Situation.InvestigatedAlertAge < 4 &&
Vector3.Distance(friend.transform.position, controller.transform.position) < controller.View.CommunicationDistance &&
Vector3.Distance(friend.AI.Situation.InvestigatedThreatPosition, InvestigationPosition) < controller.Distances.ThreatInvestigation)
{
MarkInvestigated();
break;
}
}
}
var isCheckingAThreatInCover = Threat != null && IsThreatInCover && !CanSeeTheThreat;
// Check threats
if (Threat == null || CanSeeThatNoThreatAtLastPosition || isCheckingAThreatInCover)
{
var minDist = 100000f;
foreach (var alert in Alerts.All)
{
bool isOk;
Actor newThreat = null;
if (Threat != null)
{
if (alert.Actor == null)
{
isOk = NoThreatVisibilityTime > 6;
}
else if (alert.Actor.Side != controller.Actor.Side)
{
isOk = true;
newThreat = alert.Actor;
}
else if (alert.Actor.AI != null)
{
isOk = NoThreatVisibilityTime > 2 && alert.Actor.AI.Situation.NoThreatVisibilityTime < 1;
}
else
{
isOk = NoThreatVisibilityTime > 6;
}
}
else
{
isOk = true;
}
if (isOk)
{
var dist = Vector3.Distance(controller.transform.position, alert.Position);
if (dist < alert.Range)
{
if (dist < minDist)
{
minDist = dist;
IsAlerted = true;
HasAnInvestigatedAlert = false;
HasInvestigatedTheLatestAlert = false;
if (newThreat != null)
{
ReadEnemyState(newThreat);
}
else
{
IsThreatPositionANewAlert = true;
SetThreatPosition(alert.Position, true);
}
}
}
}
}
}
// React to grenades
if (IsNoticingGrenade)
{
if (GrenadeReaction < float.Epsilon)
{
IsNoticingGrenade = false;
}
else
{
GrenadeReaction -= Time.deltaTime;
IsNearGrenade = false;
}
}
else if (IsNearGrenade && !previous.IsNearGrenade)
{
GrenadeReaction = controller.Fighting.GrenadeReactionTime;
IsNoticingGrenade = true;
IsNearGrenade = false;
}
if (IsNearGrenade)
{
IsAlerted = true;
}
// React to being alerted.
if (IsGettingAlerted)
{
if (AlertReaction < float.Epsilon)
{
IsGettingAlerted = false;
IsAlerted = true;
}
else
{
AlertReaction -= Time.deltaTime;
IsAlerted = false;
}
}
else if (IsAlerted && !previous.IsAlerted)
{
AlertReaction = controller.Fighting.ReactionTime;
IsGettingAlerted = true;
IsAlerted = false;
}
if (previous.TargetCover != null &&
(controller.Motor.LeftCover == previous.TargetCover || controller.Motor.RightCover == previous.TargetCover || controller.Motor.Cover == previous.TargetCover))
{
CurrentCover = previous.TargetCover;
}
else
{
CurrentCover = controller.Motor.Cover;
}
CurrentPosition = controller.transform.position;
IsGunReady = controller.Motor.IsGunReady && controller.Motor.Gun.Clip >= controller.Motor.Gun.ClipSize * controller.Fighting.ReloadFraction;
if (Threat == null || Threat.IsAggressive)
{
WouldLikeToRetreat = controller.Health.Health <= controller.Fighting.MinHealth;
}
else
{
WouldLikeToRetreat = false;
}
if (IsAlerted)
{
var couldSeeTheEnemy = CanSeeTheThreat;
CanSeeTheThreat = false;
if (Threat != null)
{
var noPatience = NoThreatVisibilityTime > controller.Fighting.Patience;
if (couldSeeTheEnemy || updateInDetail)
{
CanSeeTheThreat = AIUtil.IsInSight(controller, Threat.TopPosition);
}
if (CanSeeTheThreat)
{
ReadEnemyState(Threat);
if (!couldSeeTheEnemy && noPatience)
{
IsIrritated = true;
}
}
else
{
if (noPatience || (NoThreatVisibilityTime > 2 && (!IsThreatInCover || Vector3.Dot(ThreatCoverForward, ThreatGroundPosition - CurrentPosition) > 0)))
{
if (!IsThreatInCover ||
noPatience ||
Vector3.Distance(CurrentPosition, ThreatGroundPosition) < controller.Distances.ThreatInvestigation ||
AIUtil.IsInSight(controller, (ThreatGroundPosition + ThreatTopPosition) * 0.5f))
{
CanSeeThatNoThreatAtLastPosition = true;
}
}
NoThreatVisibilityTime += Time.deltaTime;
if (updateInDetail)
{
// Check friends.
foreach (var friend in Actors.All)
{
if (friend != controller.Actor &&
friend.Side == controller.Actor.Side &&
friend.AI != null &&
friend.AI.IsAlerted &&
friend.AI.State != AIState.investigate &&
friend.AI.Situation.Threat == Threat &&
friend.AI.Situation.HasBetterThreatInfo(friend.AI, ref this))
{
var vector = friend.transform.position - controller.transform.position;
if (vector.magnitude < controller.View.CommunicationDistance)
{
TakeEnemyState(friend.AI);
}
}
}
}
}
}
if (TargetCover != null && updateInDetail)
{
var distanceToThreat = Vector3.Distance(TargetPosition, ThreatGroundPosition);
IsTargetCoverGood = distanceToThreat >= controller.Distances.MinEnemy &&
distanceToThreat >= controller.Cover.MinCoverToEnemyDistance &&
AIUtil.IsGoodAngle(controller,
TargetCover,
TargetPosition,
ThreatGroundPosition,
TargetCover.IsTall) &&
!AIUtil.IsCoverPositionTooCloseToFriends(TargetCover, controller, TargetPosition);
}
if (updateInDetail)
{
if (IsThreatInCover)
{
if (CurrentCover != null && CurrentCover.IsTall)
{
var aimPoint = Vector3.zero;
var isGood = true;
if (TargetDirection < 0)
{
isGood = CurrentCover.IsLeft(Util.AngleOfVector(ThreatStandingTopPosition - CurrentCover.LeftCorner(0)), controller.Motor.CoverSettings.Angles.LeftCorner, false);
if (isGood)
{
aimPoint = CurrentCover.LeftCorner(0, controller.Motor.CoverSettings.CornerOffset.x);
}
}
else
{
isGood = CurrentCover.IsRight(Util.AngleOfVector(ThreatStandingTopPosition - CurrentCover.RightCorner(0)), controller.Motor.CoverSettings.Angles.LeftCorner, false);
if (isGood)
{
aimPoint = CurrentCover.RightCorner(0, controller.Motor.CoverSettings.CornerOffset.x);
}
}
CanSeeFromCurrentPosition = AIUtil.IsInSight(controller, aimPoint, ThreatStandingTopPosition);
}
else
{
CanSeeFromCurrentPosition = AIUtil.IsInSight(controller, CurrentPosition, ThreatStandingTopPosition);
}
}
else
{
CanSeeFromCurrentPosition = CanSeeTheThreat;
}
}
}
else
{
if (TargetCover != null && updateInDetail)
{
IsTargetCoverGood = !AIUtil.IsCoverPositionTooCloseToFriends(TargetCover, controller, TargetPosition);
}
}
}
