public override void Update(GameTime gameTime)
{
PositionDifference = Position - playerPosition;
playerPosition -= Position;
Rotation = (float)Math.Atan2(playerPosition.Y, playerPosition.X);
// Checks if Fire Fighters in Fire Range
if (PositionDifference.Length() <= 150)
{
LinearVelocity = 0;
// fires weapon if Fire Rate is ready
if (canFire)
{
FireWeapon();
}
}
//Moves if out of range of player
if (PositionDifference.Length() > 150)
{
LinearVelocity = 1;
}
//Update timer
fireTimer.Update(gameTime.ElapsedGameTime);
base.Update(gameTime);
}
public PoliceEnemy(Game game, SpriteBatch spriteBatch, Texture2D texture, Vector2 position, int seed, bool add = false)
: base(game, spriteBatch, texture, position, add)
{
// Fire Rate timer
fireTimeSpan = TimeSpan.FromSeconds(2);
fireTimer = new Timer();
fireTimer.OnExpire += () => canFire = true;
fireTimer.Start(fireTimeSpan);
// Change direction timer
turnTimeSpan = TimeSpan.FromSeconds(1);
turnTimer = new Timer();
turnTimer.OnExpire += () => canTurn = true;
turnTimer.Start(turnTimeSpan);
// Pedestrian Kill timer
pedestrianKillTimeSpan = TimeSpan.FromSeconds(5);
pedestrianKillTimer = new Timer();
pedestrianKillTimer.OnExpire += () => pedestrianKilled = false;
// enemy type
enemyType = EnemyType.Police;
Health = 200;
//Random number
random = new Random();
//State Machine
stateMachine = new StateMachine <PoliceStates>();
//Actions for States
Action policeWalkingAction = () =>
{
LinearVelocity = 1;
if (Position.X < 0 || Position.X > 2000)
{
Position.X = 1000;
Position.Y = 1000;
}
if (Position.Y < 0 || Position.Y > 2000)
{
Position.X = 1000;
Position.Y = 1000;
}
if (canTurn)
{
Rotation = (random.Next(3) - 1) * (random.Next(10));
canTurn = false;
turnTimer.Start(turnTimeSpan);
}
};
Action policeChasingAction = () =>
{
playerPosition -= Position;
Rotation = (float)Math.Atan2(playerPosition.Y, playerPosition.X);
LinearVelocity = 2;
};
Action policeDonutingAction = () =>
{
IEnumerable <PlayerBullet> bullets = Game.Components.OfType <PlayerBullet>();
foreach (PlayerBullet bullet in bullets)
{
if (bullet.weaponType == WeaponType.DonutGun)
{
donutPosition = bullet.Position;
donutPosition -= Position;
Rotation = (float)Math.Atan2(donutPosition.Y, donutPosition.X);
LinearVelocity = 2;
}
}
};
//Transitions between States
Func <bool> policeFindPlayerTransition = () =>
{
return(PositionDifference.Length() <= 200);
};
Func <bool> policeLosePlayerTransition = () =>
{
return(PositionDifference.Length() > 200);
};
Func <bool> policeFindDonutTransition = () =>
{
IEnumerable <PlayerBullet> bullets = Game.Components.OfType <PlayerBullet>();
foreach (PlayerBullet bullet in bullets)
{
if (bullet.weaponType == WeaponType.DonutGun)
{
return(true);
}
}
return(false);
};
Func <bool> policeNoMoreDonutTransition = () =>
{
IEnumerable <PlayerBullet> bullets = Game.Components.OfType <PlayerBullet>();
foreach (PlayerBullet bullet in bullets)
{
if (bullet.weaponType == WeaponType.DonutGun)
{
return(false);
}
}
return(true);
};
Func <bool> policeKillPedestrianTransition = () =>
{
//currentPedestrianCount = Game.Components.OfType<Pedestrian>().Count();
//if (currentPedestrianCount < previousPedestrianCount)
//{
// if (!pedestrianKillTimer.Running)
// {
// pedestrianKillTimer.Start(pedestrianKillTimeSpan);
// pedestrianKilled = true;
// }
//}
//update timer you idiot
if (pedestrianKilled)
{
return(true);
}
else
{
return(false);
}
};
stateMachine.AddState(PoliceStates.Walking, policeWalkingAction);
stateMachine.AddState(PoliceStates.Chasing, policeChasingAction);
stateMachine.AddState(PoliceStates.Donuting, policeDonutingAction);
stateMachine.AddTransition(PoliceStates.Walking, PoliceStates.Chasing, policeFindPlayerTransition);
stateMachine.AddTransition(PoliceStates.Chasing, PoliceStates.Walking, policeLosePlayerTransition);
stateMachine.AddTransition(PoliceStates.Walking, PoliceStates.Donuting, policeFindDonutTransition);
stateMachine.AddTransition(PoliceStates.Chasing, PoliceStates.Donuting, policeFindDonutTransition);
stateMachine.AddTransition(PoliceStates.Donuting, PoliceStates.Walking, policeNoMoreDonutTransition);
stateMachine.AddTransition(PoliceStates.Chasing, PoliceStates.Walking, policeKillPedestrianTransition);
}
