public Tile this[TilePos tp]
{
get
{
return this._tiles[tp.X, tp.Y];
}
}
/// <summary>
/// Returns a TilePos object corresponding to the specified co-ordinate
/// </summary>
/// <param name="position">The position within the world. For a GameObject, pass in the co-ordinates of the object's origin.</param>
/// <returns>A TilePos that contains the specified co-ordinate</returns>
public static TilePos TilePosFromPosition(Vector2 position)
{
var intx = (int)position.X / Tile.Width;
var inty = (int)position.Y / Tile.Height;
var result = new TilePos(intx, inty);
return result;
}
private static bool DoesMonsterHaveClearShotAtPlayer(World world, TilePos monsterTilePos, Direction firingDirection)
{
int i = 0;
var testPos = monsterTilePos;
var playerTilePos = world.Player.TilePosition;
for ( ; testPos != playerTilePos && i < 20; testPos = testPos.GetPositionAfterOneMove(firingDirection), i++)
{
bool isClear = world.CanTileBeOccupied(testPos, false);
if (!isClear)
return false;
}
return true;
}
private static Direction DetermineFiringDirection(TilePos fromTilePos, TilePos towardsTilePos)
{
int xDiff = Math.Sign(fromTilePos.X - towardsTilePos.X);
int yDiff = Math.Sign(fromTilePos.Y - towardsTilePos.Y);
if (xDiff == 0)
{
switch (yDiff)
{
case 1: return Direction.Up;
case -1: return Direction.Down;
}
}
else if (yDiff == 0)
{
switch (xDiff)
{
case 1: return Direction.Left;
case -1: return Direction.Right;
}
}
return Direction.None;
}
public static TilePos FromMortonCode(int mortonCode)
{
if (mortonCode < 0)
throw new ArgumentOutOfRangeException("mortonCode");
int x = Compact1By1(mortonCode >> 0);
int y = Compact1By1(mortonCode >> 1);
var result = new TilePos(x, y);
return result;
}
/// <summary>
/// Draws the floor of the current view
/// </summary>
private void DrawFloorTiles(ISpriteBatch spriteBatch, Rectangle r)
{
// draw the floor
for (int y = r.Top; y < r.Bottom; y++)
{
for (int x = r.Left; x < r.Right; x++)
{
var tp = new TilePos(x, y);
Texture2D texture = this._wl[tp].Floor;
if (texture != null)
{
Vector2 position = new Vector2(x, y) * Tile.Size;
spriteBatch.DrawEntireTexture(texture, position);
}
}
}
}
private IEnumerable<Fruit> GetListOfFruit(World world, ref Tile[,] tiles)
{
var result = new List<Fruit>();
foreach (WorldArea wa in this._worldAreas)
{
foreach (FruitDefinition fd in wa.FruitDefinitions.Values)
{
for (int i = 0; i < fd.FruitQuantity; )
{
var tilePos = new TilePos(wa.Area.X + Rnd.Next(wa.Area.Width), wa.Area.Y + Rnd.Next(wa.Area.Height));
Tile t = tiles[tilePos.X, tilePos.Y];
if (!t.IsFree)
continue;
tiles[tilePos.X, tilePos.Y].SetOccupationByFruit();
Vector2 position = tilePos.ToPosition();
var f = new Fruit(world, position, fd.FruitType);
result.Add(f);
i++;
}
}
}
return result;
}
public void AddGrave(TilePos tp)
{
var g = new Grave(this, tp.ToPosition());
this.GameObjects.Add(g);
}
private static Crystal GetCrystal(World world, XmlElement cdef)
{
var id = int.Parse(cdef.GetAttribute("Id"));
var tilePos = new TilePos(int.Parse(cdef.GetAttribute("Left")), int.Parse(cdef.GetAttribute("Top")));
var position = tilePos.ToPosition();
var score = int.Parse(cdef.GetAttribute("Score"));
var energy = int.Parse(cdef.GetAttribute("Energy"));
var result = new Crystal(world, position, id, score, energy);
return result;
}
private static Monster.Monster GetMonster(World world, XmlElement mdef)
{
string type = mdef.GetAttribute("Type");
var tilePos = new TilePos(int.Parse(mdef.GetAttribute("Left")), int.Parse(mdef.GetAttribute("Top")));
Vector2 position = tilePos.ToPosition();
int e = int.Parse(mdef.GetAttribute("Energy"));
Monster.Monster result = Monster.Monster.Create(type, world, position, e);
string direction = mdef.GetAttribute("Direction");
if (!string.IsNullOrEmpty(direction))
result.Direction = (Direction)Enum.Parse(typeof(Direction), direction);
string mobility = mdef.GetAttribute("Mobility");
if (!String.IsNullOrEmpty(mobility))
result.Mobility = (MonsterMobility)Enum.Parse(typeof(MonsterMobility), mobility);
string changeRooms = mdef.GetAttribute("ChangeRooms");
if (!string.IsNullOrEmpty(changeRooms))
result.ChangeRooms = (ChangeRooms)Enum.Parse(typeof(ChangeRooms), changeRooms);
string isEggAttribute = mdef.GetAttribute("IsEgg");
string timeBeforeHatchingAttribute = mdef.GetAttribute("TimeBeforeHatching");
if (!string.IsNullOrEmpty(isEggAttribute) && !string.IsNullOrEmpty(timeBeforeHatchingAttribute))
{
bool isEgg = Boolean.Parse(isEggAttribute);
int timeBeforeHatching = int.Parse(timeBeforeHatchingAttribute);
if (isEgg)
{
result.SetDelayBeforeHatching(timeBeforeHatching | 1);
}
}
string laysMushrooms = mdef.GetAttribute("LaysMushrooms");
if (!string.IsNullOrEmpty(laysMushrooms))
{
result.LaysMushrooms = Boolean.Parse(laysMushrooms);
}
string laysEggs = mdef.GetAttribute("LaysEggs");
if (!string.IsNullOrEmpty(laysEggs))
{
result.LaysEggs = Boolean.Parse(laysEggs);
}
string splitsOnHit = mdef.GetAttribute("SplitsOnHit");
if (!string.IsNullOrEmpty(splitsOnHit))
{
result.SplitsOnHit = Boolean.Parse(splitsOnHit);
}
return result;
}
private static Boulder GetBoulder(World world, XmlElement bdef)
{
var tilePos = new TilePos(int.Parse(bdef.GetAttribute("Left")), int.Parse(bdef.GetAttribute("Top")));
var position = tilePos.ToPosition();
var result = new Boulder(world, position);
return result;
}
private static CrumblyWall GetCrumblyWall(World world, XmlElement wdef)
{
var tilePos = new TilePos(int.Parse(wdef.GetAttribute("Left")), int.Parse(wdef.GetAttribute("Top")));
var position = tilePos.ToPosition();
var energy = int.Parse(wdef.GetAttribute("Energy"));
var textureName = wdef.GetAttribute("Texture");
var result = new CrumblyWall(world, position, "Tiles/" + textureName, energy);
return result;
}
public static bool ContainsTile(this Rectangle rect, TilePos tp)
{
var p = new Point(tp.X, tp.Y);
var result = rect.Contains(p);
return rect.Contains(p);
}
public void AddMushroom(TilePos tp)
{
var m = new Mushroom(this, tp.ToPosition());
this.GameObjects.Add(m);
}
public void MoveUpALevel()
{
if (!this.Player.IsAlive())
return;
int currentWorldAreaId = this._wl.GetWorldAreaIdForTilePos(this.Player.TilePosition);
int maxId = this._wl.GetMaximumWorldAreaId();
var newState = Enumerable.Range(currentWorldAreaId + 1, maxId - currentWorldAreaId).Select(i => this._wl.GetStartStateForWorldAreaId(i)).FirstOrDefault(startState => startState != null);
if (newState == null)
return;
var crystals = this.GameObjects.DistinctItemsOfType<Crystal>().Where(c => this._wl.GetWorldAreaIdForTilePos(c.TilePosition) == currentWorldAreaId);
foreach (var c in crystals)
{
var i = new InteractionWithStaticItems(this, c, this.Player);
i.Collide();
}
this.Player.Reset(newState.PlayerPosition.ToPosition(), newState.PlayerEnergy);
this.GameObjects.UpdatePosition(this.Player);
var boulder = this.GameObjects.DistinctItemsOfType<Boulder>().FirstOrDefault();
if (boulder != null)
{
TilePos? tp = null;
for (int i = 0; i < 16; i++)
{
int x = (i % 2 == 0) ? 7 - (i / 2) : 8 + ((i - 1) / 2);
var potentialPosition = new TilePos(x, newState.PlayerPosition.Y);
if (!IsStaticItemOnTile(potentialPosition))
{
tp = potentialPosition;
break;
}
}
if (tp.HasValue)
{
boulder.Reset(tp.Value.ToPosition());
this.GameObjects.UpdatePosition(boulder);
}
}
Point roomStart = GetContainingRoom(this.Player.Position).Location;
this.Game.SpriteBatch.WindowOffset = new Vector2(roomStart.X, roomStart.Y);
}
/// <summary>
/// Gets the collision mode of the tile at a particular location.
/// This method handles tiles outside of the levels boundries by making it
/// impossible to escape past the left or right edges, but allowing things
/// to jump beyond the top of the World and fall off the bottom.
/// </summary>
public bool IsTileWithinWorld(TilePos tp)
{
var x = tp.X;
var y = tp.Y;
var result = !(x < 0 || x >= this._wl.Width || y < 0 || y >= this._wl.Height);
return result;
}
/// <summary>
/// Tests whether any non-moving items are currently occupying the specified position
/// </summary>
/// <remarks>This is only to be used when looking to place non-moving items</remarks>
/// <param name="tp">The tile position to test</param>
/// <returns>True if there is already a static item occupying the specified position</returns>
public bool IsStaticItemOnTile(TilePos tp)
{
var objectsAtPosition = this.GameObjects.GetItemsOnTile(tp);
var result = objectsAtPosition.Any(gi => gi.Solidity != ObjectSolidity.Insubstantial);
return result;
}
public int GetWorldAreaIdForTilePos(TilePos tp)
{
var result = this._wl.GetWorldAreaIdForTilePos(tp);
return result;
}
/// <summary>
/// Tests whether the specified position can be occupied.
/// </summary>
/// <remarks>This is only to be used to determine whether moving objects can (temporarily) occupy the tile</remarks>
/// <param name="tp">The tile position to test</param>
/// <param name="treatMoveableItemsAsImpassable">If true then an item such as the boulder will be treated as impassable</param>
/// <returns>True if the specified tile can be occupied</returns>
public bool CanTileBeOccupied(TilePos tp, bool treatMoveableItemsAsImpassable)
{
if (!IsTileWithinWorld(tp))
return false;
var objectsAtPosition = this.GameObjects.GetItemsOnTile(tp);
var isTileAlreadyOccupied = treatMoveableItemsAsImpassable
? objectsAtPosition.Any(gi => gi.Solidity == ObjectSolidity.Impassable || gi.Solidity == ObjectSolidity.Moveable)
: objectsAtPosition.Any(gi => gi.Solidity == ObjectSolidity.Impassable);
var result = !isTileAlreadyOccupied;
return result;
}
public override bool Update(GameTime gameTime)
{
this.Mine._countdown += gameTime.ElapsedGameTime;
if (this._spreadPosition == 0)
{
this.Mine.World.AddExplosion(this.Mine.TilePosition.ToPosition(), this._energyEffects[0]);
this._spreadPosition++;
return false;
}
if (this.Mine._countdown < TimeInEachSpread)
return false;
this.Mine._countdown -= TimeInEachSpread;
TilePos tp = this.Mine.TilePosition;
var positions = new TilePos[4];
for (int i = 1; i <= this._spreadPosition; i++)
{
// Top right quadrant
positions[0] = new TilePos(tp.X + i, tp.Y + this._spreadPosition - i);
// Bottom right quadrant
positions[1] = new TilePos(tp.X + this._spreadPosition - i, tp.Y - i);
// Bottom left quadrant
positions[2] = new TilePos(tp.X - i, tp.Y - this._spreadPosition + i);
// Top left quadrant
positions[3] = new TilePos(tp.X - this._spreadPosition + i, tp.Y + i);
int energy = this._energyEffects[this._spreadPosition];
for (int j = 0; j < 4; j++)
this.Mine.World.AddExplosion(positions[j].ToPosition(), energy);
}
this._spreadPosition++;
return false;
}
public int GetWorldAreaIdForTilePos(TilePos tp)
{
var areaContainingPoint =
(from WorldArea wa in this._worldAreas
where wa.HasId && wa.StartState != null && wa.Area.Contains(tp.X, tp.Y)
select wa).Single();
var result = areaContainingPoint.Id;
return result;
}
