public InteractionWithMovingItems(World world, MovingItem movingItem1, MovingItem movingItem2)
{
if (world == null)
throw new ArgumentNullException("world");
if (movingItem1 == null)
throw new ArgumentNullException("movingItem1");
if (movingItem2 == null)
throw new ArgumentNullException("movingItem2");
this._world = world;
this._movingItem1 = movingItem1;
this._movingItem2 = movingItem2;
}
public ShotAndMovingItemInteraction(World world, Shot shot, MovingItem movingItem)
{
if (world == null)
throw new ArgumentNullException("world");
if (shot == null)
throw new ArgumentNullException("shot");
if (movingItem == null)
throw new ArgumentNullException("movingItem");
this._world = world;
this._shot = shot;
this._movingItem = movingItem;
}
public MovingItemAndStaticItemInteraction(World world, MovingItem movingItem, StaticItem staticItem)
{
if (world == null)
throw new ArgumentNullException("world");
if (movingItem == null)
throw new ArgumentNullException("movingItem");
if (staticItem == null)
throw new ArgumentNullException("staticItem");
if (movingItem is Shot)
throw new ArgumentOutOfRangeException("movingItem");
if (staticItem is MovingItem)
throw new ArgumentOutOfRangeException("staticItem");
this._world = world;
this._movingItem = movingItem;
this._staticItem = staticItem;
}
private static bool InteractionInvolvingShot(World world, Shot shot, MovingItem movingItem)
{
if (movingItem is Player)
{
movingItem.ReduceEnergy(shot.Energy);
if (movingItem.IsAlive())
world.Game.SoundPlayer.Play(GameSound.PlayerInjured);
world.ConvertShotToBang(shot);
return true;
}
var monster = movingItem as Monster.Monster;
if (monster != null)
{
var result = ShotHitsMonster(world, shot, monster);
return result;
}
var items = new[] { shot, movingItem };
var explosion = items.OfType<Explosion>().FirstOrDefault();
if (explosion != null)
{
var otherItem = items.Single(item => item != explosion);
if (otherItem is Shot)
{
shot.ReduceEnergy(explosion.Energy);
return true;
}
}
var standardShot1 = shot as StandardShot;
var standardShot2 = movingItem as StandardShot;
if (standardShot1 != null && standardShot2 != null)
{
var result = ShotHitsShot(world, standardShot1, standardShot2);
return result;
}
return false;
}
public MovingItemAndMovingItemInteraction(World world, MovingItem movingItem1, MovingItem movingItem2)
{
if (world == null)
throw new ArgumentNullException("world");
if (movingItem1 == null)
throw new ArgumentNullException("movingItem1");
if (movingItem2 == null)
throw new ArgumentNullException("movingItem2");
if (movingItem1 is Shot)
throw new ArgumentOutOfRangeException("movingItem1");
if (movingItem2 is Shot)
throw new ArgumentOutOfRangeException("movingItem2");
this._world = world;
var items = new[] {movingItem1, movingItem2};
this._player = items.OfType<Player>().SingleOrDefault();
this._boulder = items.OfType<Boulder>().SingleOrDefault();
this._mine = items.OfType<Mine>().SingleOrDefault();
this._monster1 = items.OfType<Monster.Monster>().FirstOrDefault();
this._monster2 = items.OfType<Monster.Monster>().Skip(1).FirstOrDefault();
this._moveableObject = items.FirstOrDefault(item => item.Solidity == ObjectSolidity.Moveable);
this._insubstantialObject = items.FirstOrDefault(item => item.Solidity == ObjectSolidity.Insubstantial);
}
public void SteppedOnBy(MovingItem movingItem)
{
this._mineState.SteppedOnBy(movingItem);
}
public override void SteppedOnBy(MovingItem movingItem)
{
this.Mine._mineState = new FiredState(this.Mine);
}
public abstract void SteppedOnBy(MovingItem movingItem);
public override void SteppedOnBy(MovingItem movingItem)
{
if (movingItem is Player)
this.Mine._countdown = TimeSpan.Zero;
}
public override void SteppedOnBy(MovingItem movingItem)
{
// nothing to do
}
public override void SteppedOnBy(MovingItem movingItem)
{
if (movingItem is Player)
this.Mine._mineState = new InactiveState(this.Mine);
}
/// <summary>
/// Used to begin a push or bounce action by the player
/// </summary>
/// <param name="byWhom">The game object that is acting on the boulder</param>
/// <param name="direction">Which direction the specified game object is directing the boulder</param>
public void PushOrBounce(MovingItem byWhom, Direction direction)
{
var ps = CanBePushedOrBounced(byWhom, direction, true);
switch (ps)
{
case PushStatus.No:
return;
case PushStatus.Yes:
{
System.Diagnostics.Trace.WriteLine(string.Format("{0} is pushing {1}", byWhom.GetType().Name, this.GetType().Name));
this.Move(direction, this.StandardSpeed);
return;
}
case PushStatus.Bounce:
{
System.Diagnostics.Trace.WriteLine(string.Format("{0} is bouncing {1}", byWhom.GetType().Name, this.GetType().Name));
var reverseDirection = direction.Reversed();
this.Move(reverseDirection, this.BounceBackSpeed);
byWhom.Move(reverseDirection, this.BounceBackSpeed);
this.World.Game.SoundPlayer.Play(GameSound.BoulderBounces);
return;
}
default:
throw new InvalidOperationException();
}
}
private PushStatus CanBePushedOrBounced(MovingItem byWhom, Direction direction, bool isBounceBackPossible)
{
if (this.Solidity != ObjectSolidity.Moveable)
return PushStatus.No;
bool isPushable = byWhom.Capability == ObjectCapability.CanPushOthers || byWhom.Capability == ObjectCapability.CanPushOrCauseBounceBack;
if (!isPushable)
return PushStatus.No;
// first check if the object can be pushed
if (this.CanMoveInDirection(direction, isBounceBackPossible))
return PushStatus.Yes;
// is bounce back possible?
if (byWhom.Capability != ObjectCapability.CanPushOrCauseBounceBack || !isBounceBackPossible)
return PushStatus.No;
var result = byWhom.CanMoveInDirection(direction.Reversed(), false) ? PushStatus.Bounce : PushStatus.No;
return result;
}
private bool PushOrBounceObject(MovingItem moveableObject, MovingItem movingObject)
{
// test whether moveable object can be pushed or bounced
if (moveableObject.Direction == Direction.None && movingObject.Direction != Direction.None)
{
Vector2 currentDifference = movingObject.Position - moveableObject.Position;
float currentDistanceApart = Math.Abs(currentDifference.Length());
if (currentDistanceApart < 40)
{
Vector2 positionWithMovement = movingObject.Position + movingObject.Direction.ToVector();
Vector2 potentialDifference = positionWithMovement - moveableObject.Position;
float potentialDistanceApart = Math.Abs(potentialDifference.Length());
if (potentialDistanceApart < currentDistanceApart)
{
moveableObject.PushOrBounce(movingObject, movingObject.Direction);
var standardShot = movingObject as StandardShot;
if (standardShot != null)
this._world.ConvertShotToBang(standardShot);
return true;
}
}
}
// test whether the moveable object crushing the insubstantial object
if (moveableObject.Direction != Direction.None && moveableObject.Direction != movingObject.Direction)
{
var insubstantialObjectPosition = movingObject.Direction == Direction.None ? movingObject.Position : movingObject.MovingTowards;
var insubtantialObjectTile = TilePos.TilePosFromPosition(insubstantialObjectPosition);
var moveableObjectTile = TilePos.TilePosFromPosition(moveableObject.MovingTowards);
if (insubtantialObjectTile == moveableObjectTile)
{
var energy = movingObject.InstantlyExpire();
this._world.AddBang(movingObject.Position, BangType.Long);
if (movingObject is Monster.Monster)
{
this._world.Game.SoundPlayer.Play(GameSound.MonsterDies);
if (!(movingObject is DeathCube))
{
var score = ((energy >> 1) + 1)*20;
this._world.IncreaseScore(score);
}
}
return true;
}
}
return false;
}