public bool SetTarget(CellLocation loc)
{
if (IsMoving)
{
//We are the bear rolling from the hill
throw new InvalidOperationException("Unable to change direction while moving");
}
if (loc == CellLocation)
{
return(true);
}
Facing = GetDirection(CellLocation, loc);
if (loc.X < 0 || loc.Y < 0)
{
return(false);
}
if (loc.X >= _field.Width || loc.Y >= _field.Height)
{
return(false);
}
if (!_field.Tiles[loc.X, loc.Y].IsPassable)
{
return(false);
}
if (
_field.GameObjects.OfType <MovingGameObject>()
.Any(t => t != this && (t.CellLocation == loc || t.TargetCellLocation == loc)))
{
return(false);
}
TargetCellLocation = loc;
return(true);
}
Facing GetDirection(CellLocation current, CellLocation target)
{
if (target.X < current.X)
{
return(Facing.West);
}
if (target.X > current.X)
{
return(Facing.East);
}
if (target.Y < current.Y)
{
return(Facing.North);
}
return(Facing.South);
}
public CellLocation GetTileAtDirection(Facing facing)
{
if (facing == Facing.North)
{
return(CellLocation.WithY(CellLocation.Y - 1));
}
if (facing == Facing.South)
{
return(CellLocation.WithY(CellLocation.Y + 1));
}
if (facing == Facing.West)
{
return(CellLocation.WithX(CellLocation.X - 1));
}
return(CellLocation.WithX(CellLocation.X + 1));
}
public bool Equals(CellLocation other)
{
return(X == other.X && Y == other.Y);
}
protected MovingGameObject(GameField field, CellLocation location, Facing facing) : base(location.ToPoint())
{
_field = field;
Facing = facing;
CellLocation = TargetCellLocation = location;
}
public void SetLocation(CellLocation loc)
{
CellLocation = loc;
Location = loc.ToPoint();
}