/// <summary>
/// PigWorld already has gaps between each pair of cells,
/// so put walls in some of them, for demonstration purposes.
/// </summary>
private void CreateDemoWalls()
{
PigWorld.FillVerticalGap(1, 2);
PigWorld.FillVerticalGap(2, 2);
PigWorld.FillVerticalGap(3, 2);
PigWorld.FillVerticalGap(4, 2);
PigWorld.FillVerticalGap(5, 2);
PigWorld.FillVerticalGap(2, 4);
PigWorld.FillVerticalGap(3, 4);
PigWorld.FillVerticalGap(4, 4);
PigWorld.FillVerticalGap(5, 4);
PigWorld.FillHorizontalGap(6, 0);
PigWorld.FillHorizontalGap(6, 1);
PigWorld.FillHorizontalGap(6, 2);
PigWorld.FillHorizontalGap(6, 3);
PigWorld.FillVerticalGap(0, 5);
PigWorld.FillVerticalGap(1, 5);
PigWorld.FillVerticalGap(2, 5);
PigWorld.FillVerticalGap(3, 5);
PigWorld.FillVerticalGap(4, 5);
PigWorld.FillVerticalGap(5, 5);
PigWorld.FillVerticalGap(3, 7);
PigWorld.FillVerticalGap(4, 7);
PigWorld.FillVerticalGap(6, 7);
PigWorld.FillVerticalGap(7, 7);
PigWorld.FillVerticalGap(8, 7);
}
private double sweepAngle; // the current angle of the radar's sweep
/// <summary>
/// Constructs a new Radar.
/// </summary>
/// <param name="owner">A reference to the LifeForm that owns this radar. </param>
/// <param name="targetType"> The type of object detected by this radar. </param>
public Radar(LifeForm owner, Type targetType)
{
this.owner = owner;
this.pigWorld = owner.PigWorld;
this.targetType = targetType;
sweepAngle = -1.0; // negative value ensures 0 degrees will be swept first.
}
/// <summary>
/// Constructs a new Pig at, or near, the specified position.
/// If the desired position is already occupied by another LifeForm,
/// then the pig will be placed in a nearby Cell.
/// If no nearby Cells are free, then the pig will not be added to the pigWorld.
///
/// This constructor is protected since only Pig subclasses should be
/// able to create a pig.
/// </summary>
/// <param name="pigWorld"> the pigWorld that this pig is entering </param>
/// <param name="position"> the preferred position for the new pig </param>
/// <param name="color"> the pig's colour (blue or pink) </param>
/// <param name="mother"> the pig's mother (may be null)</param>
/// <param name="father"> the pig's father (may be null)</param>
protected Pig(PigWorld pigWorld, Position position, Color color, GirlPig mother, BoyPig father)
{
this.color = color; // Must be set before AddToWorld is called.
this.mother = mother;
this.father = father;
AddToWorld(pigWorld, position); // Must be called before any sounds are played.
}
/// <summary>
/// Every subclass MUST call this method, or the above AddToWorld() method,
/// as the last line of its constructor. This method will complete the
/// creation of a new Thing by making it appear in the pigWorld.
/// The Thing will be placed at, or nearby, the position specified.
/// </summary>
/// <param name="pigWorld"> the PigWorld in which this Thing should be created. </param>
/// <param name="position"></param>
protected void AddToWorld(PigWorld pigWorld, Position position)
{
// It is necessary for this Thing to know its pigWorld before pigWorld.AddThing() is called.
this.pigWorld = pigWorld;
if (!pigWorld.AddThing(this, position))
{
// If we failed to add ourselves to the pigWorld, set our pigWorld
// reference back to null...
this.pigWorld = null;
}
}
/// <summary>
/// Constructs a new piece of rope.
/// </summary>
/// <param name="pigWorld"></param>
/// <param name="ownerPig"></param>
/// <param name="position"></param>
public RopePiece(PigWorld pigWorld, Pig ownerPig, Position position)
{
this.ownerPig = ownerPig;
// Allow more than one ropePiece in a cell. (See comments at top of Cell.cs.)
OnlyOneObjectOfThisTypePerCell = false;
AddToWorld(pigWorld, position);
if (this.PigWorld == null)
{
throw new Exception("Error: Rope could not be created!");
}
}
/// <summary>
/// Set-up the third demo, by adding various objects (and walls) to PigWorld.
/// </summary>
public void SetupDemo3()
{
BoyPig boyPig = new BoyPig(PigWorld, new Position(4, 3));
GirlPig girlPig = new GirlPig(PigWorld, new Position(4, 5));
Tree tree1 = new Tree(PigWorld, new Position(0, 4));
Tree tree2 = new Tree(PigWorld, new Position(4, 4));
Tree tree3 = new Tree(PigWorld, new Position(8, 4));
Wolf wolf = new Wolf(PigWorld, new Position(0, 0));
PigFood pigFood1 = new PigFood(PigWorld, new Position(8, 0));
PigFood pigFood2 = new PigFood(PigWorld, new Position(8, 1));
PigFood pigFood3 = new PigFood(PigWorld, new Position(7, 0));
PigFood pigFood4 = new PigFood(PigWorld, new Position(1, 8));
PigFood pigFood5 = new PigFood(PigWorld, new Position(0, 8));
PigFood pigFood6 = new PigFood(PigWorld, new Position(0, 7));
PigWorld.FillVerticalGap(2, 5);
PigWorld.FillVerticalGap(3, 1);
PigWorld.FillVerticalGap(3, 6);
PigWorld.FillVerticalGap(4, 1);
PigWorld.FillVerticalGap(4, 6);
PigWorld.FillVerticalGap(5, 1);
PigWorld.FillVerticalGap(5, 6);
PigWorld.FillVerticalGap(6, 2);
PigWorld.FillHorizontalGap(1, 3);
PigWorld.FillHorizontalGap(1, 4);
PigWorld.FillHorizontalGap(1, 5);
PigWorld.FillHorizontalGap(3, 1);
PigWorld.FillHorizontalGap(3, 7);
PigWorld.FillHorizontalGap(4, 0);
PigWorld.FillHorizontalGap(4, 8);
PigWorld.FillHorizontalGap(6, 3);
PigWorld.FillHorizontalGap(6, 4);
PigWorld.FillHorizontalGap(6, 5);
}
/// <summary>
/// Constructs a new piece of PigFood. The PigFood will be placed at a random
/// location.
/// </summary>
/// <param name="pigWorld"> the PigWorld in which to create the PigFood. </param>
public PigFood(PigWorld pigWorld)
{
Init();
AddToWorld(pigWorld);
}
/// <summary>
/// Constructs a new Cell.
/// </summary>
/// <param name="pigWorld"></param>
/// <param name="position"></param>
public Cell(PigWorld pigWorld, Position position)
{
this.pigWorld = pigWorld;
this.position = position;
air = new Air(this);
}
/// <summary>
/// Causes this Animal to try to move one step in the direction of the specified targetCell.
/// </summary>
/// <param name="targetCell"> the cell to move towards. </param>
/// <returns> true if the Animal successfully moved, or false otherwise. </returns>
public bool Move(Cell targetCell)
{
return(Move(PigWorld.GetDirection(this.Cell, targetCell)));
}
/// <summary>
/// Draws the RopePiece on the screen.
/// (Doesn't use an image from a file).
///
/// Overrides the Paint method in the base class, ThingView.
/// </summary>
/// <param name="graphics"> the Graphics object on which the animal's image is displayed. </param>
protected override void Paint(Graphics graphics)
{
PigWorld pigWorld = ropePiece.PigWorld;
Position thisPos = ropePiece.Cell.Position;
int indexOfThisRopePiece = ropePiece.GetIndex();
// Get RopePiece dropped just before this one (if any).
RopePiece previousRopePiece = ropePiece.OwnerPig.ropePieces.ElementAtOrDefault(indexOfThisRopePiece - 1);
// Is null when this element does not exist.
// Get RopePiece dropped just after this one (if any).
RopePiece nextRopePiece = ropePiece.OwnerPig.ropePieces.ElementAtOrDefault(indexOfThisRopePiece + 1);
// Is null when this element does not exist.
int viewWidth = thingViewRectangle.Width;
int viewHeight = thingViewRectangle.Height;
Point midPoint = new Point(viewWidth / 2, viewHeight / 2);
// Set the starting point for the line to be drawn.
Point startPoint = new Point();
// If there is a previous piece of rope, use its position.
if (previousRopePiece != null)
{
Position previousPos = previousRopePiece.Cell.Position;
startPoint.X = midPoint.X + (viewWidth / 2) * (previousPos.Column - thisPos.Column);
startPoint.Y = midPoint.Y + (viewHeight / 2) * (previousPos.Row - thisPos.Row);
}
else
{
// Else, start in the middle of the cell.
startPoint = midPoint;
}
// Set the ending point for the line to be drawn.
Point endPoint = new Point();
Position nextPos;
// If there is a next piece of rope, use its position.
if (nextRopePiece != null)
{
nextPos = nextRopePiece.Cell.Position;
}
else
{
// Else, use the pig's current position.
nextPos = ropePiece.OwnerPig.Cell.Position;
}
endPoint.X = midPoint.X + (viewWidth / 2) * (nextPos.Column - thisPos.Column);
endPoint.Y = midPoint.Y + (viewHeight / 2) * (nextPos.Row - thisPos.Row);
// Use a rope width of 2 because the default width of 1 isn't always visible in small windows.
const float penWidth = 2f;
using (Pen ropePen = new Pen(ropePiece.Color, penWidth)) {
// If the line would be only along the edge of the cell, then draw two lines to make the rope clearer.
if ((startPoint.X == endPoint.X && (startPoint.X == 0 || startPoint.X == viewWidth)) ||
(startPoint.Y == endPoint.Y && (startPoint.Y == 0 || startPoint.Y == viewHeight)))
{
graphics.DrawLine(ropePen, startPoint.X, startPoint.Y, midPoint.X, midPoint.Y);
graphics.DrawLine(ropePen, midPoint.X, midPoint.Y, endPoint.X, endPoint.Y);
}
else
{
// Else draw just one line.
graphics.DrawLine(ropePen, startPoint.X, startPoint.Y, endPoint.X, endPoint.Y);
}
}
}
/// <summary>
/// Every subclass MUST call this method, or the second AddToWorld()
/// method, as the last line of its constructor. This method will complete
/// the creation of a new Thing by making it appear in the pigWorld.
/// The Thing will be placed at a random location.
/// </summary>
/// <param name="pigWorld"> the PigWorld in which this Thing should be created. </param>
protected void AddToWorld(PigWorld pigWorld)
{
AddToWorld(pigWorld, Position.any);
}
/// <summary>
/// Constructs a new BoyPig without parents,
/// e.g. when a pig is added to the pigWorld by the user.
/// See the following constructor for further details.
/// </summary>
/// <param name="pigWorld"> the pigWorld that this pig is entering </param>
/// <param name="position"> the preferred position for the new pig </param>
public BoyPig(PigWorld pigWorld, Position position)
: this(pigWorld, position, null, null) // In this context, "this" is a call to the constructor below.
{
}
/// <summary>
/// Constructs a new Wolf at the specified position. If the desired position is
/// already occupied by another LifeForm, then the Wolf will be placed in a
/// nearby Cell. If there are no nearby Cells that are free, then the Wolf
/// will not be added to the pigWorld.
/// </summary>
/// <param name="pigWorld"></param>
/// <param name="position"></param>
public Wolf(PigWorld pigWorld, Position position)
{
AddToWorld(pigWorld, position);
}
/// <summary>
/// Constructs a new Wolf.
/// </summary>
/// <param name="pigWorld"> the PigWorld in which to create the Wolf. </param>
public Wolf(PigWorld pigWorld)
: this(pigWorld, Position.any) // In this context, "this" is a call to the constructor below.
{
}
/// <summary>
/// Constructs a new Tree at the specified position. If the desired position is
/// already occupied by another Thing, then the Tree will be placed in a
/// nearby Cell. If there are no nearby Cells that are free, then the Tree
/// will not be added to the pigWorld.
/// </summary>
/// <param name="pigWorld"></param>
/// <param name="position"></param>
public Tree(PigWorld pigWorld, Position position)
{
AddToWorld(pigWorld, position);
}
/// <summary>
/// Constructs a new piece of PigFood. The PigFood will be placed at, or
/// nearby, the specified position.
/// </summary>
public PigFood(PigWorld pigWorld, Position position)
{
Init();
AddToWorld(pigWorld, position);
}
/// <summary>
/// Constructs a new BoyPig at, or near, the specified position.
/// If the desired position is already occupied by another LifeForm,
/// then the pig will be placed in a nearby Cell.
/// If no nearby Cells are free, then the pig will not be added to the pigWorld.
/// </summary>
/// <param name="pigWorld"> the pigWorld that this pig is entering </param>
/// <param name="position"> the preferred position for the new pig </param>
/// <param name="color"> the pig's colour (blue or pink) </param>
/// <param name="mother"> the pig's mother (may be null)</param>
/// <param name="father"> the pig's father (may be null)</param>
public BoyPig(PigWorld pigWorld, Position position, GirlPig mother, BoyPig father)
: base(pigWorld, position, BOY_COLOR, mother, father)
{
}
/// <summary>
/// Destroys this Thing so that it ceases to exist.
/// Example 1: the Eat() method inside Animal calls Delete() on the food
/// after transferring its energy to the eater.
/// Example 2: to make a NonlivingThing disappear, you need to pick it up
/// (with Cell.pickup), then destroy it (with Thing.Delete()).
/// </summary>
public virtual void Delete()
{
thingDestroyedEvent();
pigWorld.RemoveThing(this);
pigWorld = null;
}