protected override void SetupStateMachine()
{
stateMachine = new StateMachine();
var pickAPointAtASafeDistance = new MaintainRangeFromTransform(this, player, playerProximity);
var walkToTarget = new MoveToTarget(this, agent, MoveState.Walking);
var startRunningAway = new StartRunningAway(this, agent, playerProximity, maxRangeToPlayer + 2.0f);
var runAwayABit = new RunAwayFromTransform(this, agent, playerProximity, MoveState.Running);
var stareAtPlayer = new StareAtTransform(this, agent, player);
var chargeAtPlayer = new ChargeAtPlayer(this, agent, player, rescueAttack);
var toggleAttack = new ToggleAttack(rescueAttack);
var aggressivelyWait = new StandAndWait();
//////----
// Set Transitions
//
// Passives
// pickAPointAtASafeDistance
stateMachine.AddTransition(pickAPointAtASafeDistance, walkToTarget, () => true);
// walkToTarget
stateMachine.AddTransition(walkToTarget, pickAPointAtASafeDistance, ReachedGoalPosition());
stateMachine.AddTransition(walkToTarget, startRunningAway, TooCloseToPlayer());
stateMachine.AddTransition(walkToTarget, pickAPointAtASafeDistance, GotStuck());
// startRunningAway
stateMachine.AddTransition(startRunningAway, runAwayABit, () => true);
// runAwayABit
stateMachine.AddTransition(runAwayABit, pickAPointAtASafeDistance, EscapedFromPlayer());
// Aggressive State Transitions
// stareAtPlayer
stateMachine.AddTransition(stareAtPlayer, toggleAttack, WaitFor(stareAtPlayer, chargeUpTime));
// toggleAttack
stateMachine.AddTransition(toggleAttack, chargeAtPlayer, () => true);
// chargeAtPlayer
stateMachine.AddTransition(chargeAtPlayer, aggressivelyWait, ChargeAttackEnded());
// aggressivelyWait
stateMachine.AddTransition(aggressivelyWait, pickAPointAtASafeDistance, WaitFor(aggressivelyWait, pauseAfterAttack));
//////----
// Universal Transitions
//
// One-frame States
stateMachine.AddUniversalTransition(stareAtPlayer, GoingAggressive());
// Conditions
Func <bool> ReachedGoalPosition() =>
() => Vector3.Distance(transform.position, goalPosition) <= agent.stoppingDistance + 0.2f;
Func <bool> GotStuck() =>
() => timeSinceLastProgress > StuckTime;
Func <bool> TooCloseToPlayer() =>
() => playerProximity.IsInRange;
Func <bool> EscapedFromPlayer() =>
() => !playerProximity.IsInRange;
Func <bool> WaitFor(IWaitableState state, float seconds) =>
() => state.GetTimeElapsed() > seconds;
Func <bool> ChargeAttackEnded() =>
() => !rescueAttack.IsEnabled();
Func <bool> GoingAggressive() =>
() =>
{
if (attackCooldown < 0.0f)
{
StartAttackCooldown();
return(true);
}
return(false);
};
// Set initial state
stateMachine.SetState(pickAPointAtASafeDistance);
}
protected override void SetupStateMachine()
{
stateMachine = new StateMachine();
/* @NOTE:
* Current intent is to not actually implement the AI as described. We don't have the API to make
* assertions about whether or not a child has received the balloon they wanted. We can only check
* unicorns for captured states. As a result, I see fit to only implement guarding *unicorns*
* and not children from being delivered. We can revisit this later if there is time.
*/
var findGuardTarget = new FindGuardTarget(this);
var betweenTargetAndGuard = new TargetPositionBetween(this, player);
var moveToGuardPoint = new MoveToTarget(this, agent, MoveState.Walking);
var passivelyWait = new StandAndWait();
var stareAtPlayer = new StareAtTransform(this, agent, player);
var chargeAtPlayer = new ChargeAtPlayer(this, agent, player, chargingAttack);
var chargeAttackRecoil = new ChargeAttackRecoil(agent, player, chargingAttack);
var aggressivelyWait = new StandAndWait();
#region Transitions
// Passive State Transitions
// findGuardTarget
stateMachine.AddTransition(findGuardTarget, betweenTargetAndGuard, HasGuardTarget());
stateMachine.AddTransition(betweenTargetAndGuard, moveToGuardPoint, () => true);
// moveToGuardPoint
stateMachine.AddTransition(moveToGuardPoint, findGuardTarget, GotStuck());
stateMachine.AddTransition(moveToGuardPoint, findGuardTarget, WaitFor(moveToGuardPoint, 1.0f));
stateMachine.AddTransition(moveToGuardPoint, passivelyWait, ReachedGoalPosition());
// standAndWait
stateMachine.AddTransition(passivelyWait, findGuardTarget, WaitFor(passivelyWait, 1.0f));
// Aggressive State Transitions
// stareAtPlayer
stateMachine.AddTransition(stareAtPlayer, chargeAtPlayer, WaitFor(stareAtPlayer, chargeUpTime));
stateMachine.AddTransition(stareAtPlayer, findGuardTarget, PlayerNotInRange());
// chargeAtPlayer
stateMachine.AddTransition(chargeAtPlayer, findGuardTarget, PlayerNotInRange());
stateMachine.AddTransition(chargeAtPlayer, aggressivelyWait, PlayerNotInFront());
stateMachine.AddTransition(chargeAtPlayer, chargeAttackRecoil, ChargeAttackSuccessful());
//chargeAttackRecoil
stateMachine.AddTransition(chargeAttackRecoil, stareAtPlayer, WaitFor(chargeAttackRecoil, chargingAttack.ministunDuration * 2.0f));
// aggressivelyWait
stateMachine.AddTransition(aggressivelyWait, stareAtPlayer, WaitFor(aggressivelyWait, unsuccessfulWaitTime));
// Universal State Transitions
stateMachine.AddUniversalTransition(stareAtPlayer, GoAggressive());
stateMachine.AddUniversalTransition(findGuardTarget, GoPassive());
#endregion
// Conditions
Func <bool> HasGuardTarget() =>
() => guardTarget != null;
Func <bool> GotStuck() =>
() => timeSinceLastProgress > StuckTime;
Func <bool> ReachedGoalPosition() =>
() => Vector3.Distance(transform.position, goalPosition) <= agent.stoppingDistance + 0.2f;
Func <bool> WaitFor(IWaitableState state, float seconds) =>
() => state.GetTimeElapsed() > seconds;
Func <bool> GoAggressive() =>
() =>
{
if (isAggressive || !playerProximity.IsInRange)
{
return(false);
}
isAggressive = true;
return(true);
};
Func <bool> GoPassive() =>
() =>
{
if (!isAggressive || playerProximity.IsInRange)
{
return(false);
}
isAggressive = false;
return(true);
};
Func <bool> PlayerNotInRange() =>
() => !playerProximity.IsInRange;
Func <bool> PlayerNotInFront() =>
() => Vector3.Dot(transform.forward, player.position - transform.position) < 0.3f;
Func <bool> ChargeAttackSuccessful() =>
() => !chargingAttack.IsEnabled();
// Set initial state
stateMachine.SetState(findGuardTarget);
}