public ComputerControlledTank(
ISoundManager soundManager,
World world,
Collection<IDoodad> doodads,
Team team,
Vector2 position,
float rotation,
Random random,
DoodadFactory doodadFactory,
IEnumerable<Waypoint> waypoints)
: base(soundManager, world, doodads, team, position, rotation, doodadFactory)
{
this.world = world;
this.random = random;
this.states = new Dictionary<Type, ITankState>();
this.states.Add(typeof(MovingState), new MovingState(world, this.Body, this, waypoints, random));
this.states.Add(typeof(AttackingState), new AttackingState(world, this.Body, this));
this.states.Add(typeof(TurningState), new TurningState(this.Body, this));
this.currentState = this.states[typeof(MovingState)];
this.currentState.StateChanged += this.OnStateChanged;
this.currentState.NavigateTo();
this.sensor = BodyFactory.CreateBody(world, this.Position);
var shape = new CircleShape(6, 0);
Fixture sensorFixture = this.sensor.CreateFixture(shape);
sensorFixture.Friction = 1f;
sensorFixture.IsSensor = true;
sensorFixture.CollisionCategories = PhysicsConstants.SensorCategory;
sensorFixture.CollidesWith = PhysicsConstants.PlayerCategory | PhysicsConstants.ObstacleCategory |
PhysicsConstants.MissileCategory;
}
protected override void OnUpdate(GameTime gameTime)
{
this.sensor.SetTransform(this.Position, this.Rotation);
if (!(this.currentState is AttackingState) &&
this.closestTarget != null &&
this.closestTarget.Item2 is PlayerControlledTank)
{
this.Target = (Tank)this.closestTarget.Item2;
this.closestTarget = null;
this.interruptedState = this.currentState;
this.ChangeState(this.states[typeof(AttackingState)]);
return;
}
if (this.currentState is AttackingState &&
this.closestTarget != null &&
!(this.closestTarget.Item2 is PlayerControlledTank))
{
this.Target = null;
this.closestTarget = null;
this.ChangeState(this.interruptedState);
this.interruptedState = null;
}
this.elapsedTime += gameTime.ElapsedGameTime;
bool isEnemyInRange = false;
ContactEdge edge = this.sensor.ContactList;
while (edge != null)
{
if (edge.Contact.IsTouching() &&
(edge.Contact.FixtureA.Body.UserData is PlayerControlledTank || edge.Contact.FixtureB.UserData is PlayerControlledTank))
{
Fixture enemy = edge.Contact.FixtureA.Body.UserData is PlayerControlledTank
? edge.Contact.FixtureA
: edge.Contact.FixtureB;
isEnemyInRange = true;
if (this.elapsedTime.TotalSeconds > 0.1)
{
this.elapsedTime = TimeSpan.Zero;
this.closestTarget = null;
this.TryToTargetEnemny(((Tank)enemy.Body.UserData));
}
break;
}
if (edge.Contact.FixtureA.Body.UserData is Missile ||
edge.Contact.FixtureB.Body.UserData is Missile)
{
Missile missile = edge.Contact.FixtureA.Body.UserData is Missile
? edge.Contact.FixtureA.Body.UserData as Missile
: edge.Contact.FixtureB.Body.UserData as Missile;
this.TestForDanger(missile);
}
edge = edge.Next;
}
if (!isEnemyInRange && this.currentState is AttackingState)
{
this.Target = null;
this.closestTarget = null;
this.ChangeState(this.interruptedState);
this.interruptedState = null;
}
this.currentState.Update(gameTime);
}
private void ChangeState(ITankState nextState)
{
this.currentState.StateChanged -= this.OnStateChanged;
this.currentState = nextState;
this.currentState.StateChanged += this.OnStateChanged;
this.currentState.NavigateTo();
}
public void ChangeState(ITankState newState)
{
State.Exit(this);
State = newState;
State.Enter(this);
}
