/// <param name="changeDirectionModifier">Value from 0.0 to 1.0. Percentage chance of changing direction.</param>
public DirectionPicker(Random random, Direction previousDirection, double changeDirectionModifier)
{
_random = random;
_directionsPicked = new List<Direction>();
_previousDirection = previousDirection;
_changeDirectionModifer = changeDirectionModifier;
}
public bool HasAdjacentCellInDirection(Vector2I location, Direction direction)
{
// Check that the location falls within the bounds of the map:
if (!Bounds.Contains(location))
{
return false;
}
// Check if there is an adjacent cell in the direction:
if (direction.Equals(Direction.North))
{
return location.Y > 0;
}
else if (direction.Equals(Direction.South))
{
return location.Y < (Rows - 1);
}
else if (direction.Equals(Direction.West))
{
return location.X > 0;
}
else if (direction.Equals(Direction.East))
{
return location.X < (Columns - 1);
}
else
{
return false;
}
}
static Direction()
{
_random = new Random();
North = new Direction(new Vector2I(0, -1));
South = new Direction(new Vector2I(0, 1));
East = new Direction(new Vector2I(1, 0));
West = new Direction(new Vector2I(-1, 0));
}
public Entity()
{
_isAlive = true;
_speed = 1.0f;
_orientation = Direction.North;
_range = 4.0f;
Size = 1.0f;
}
private Vector2I CreateSide(Vector2I location, Direction direction, SideType sideType)
{
var target = GetTargetLocation(location, direction);
if (direction.Equals(Direction.North))
{
this[location].NorthSide = sideType;
this[target].SouthSide = sideType;
}
else if (direction.Equals(Direction.South))
{
this[location].SouthSide = sideType;
this[target].NorthSide = sideType;
}
else if (direction.Equals(Direction.West))
{
this[location].WestSide = sideType;
this[target].EastSide = sideType;
}
else if (direction.Equals(Direction.East))
{
this[location].EastSide = sideType;
this[target].WestSide = sideType;
}
return target;
}
public Vector2I CreateDoor(Vector2I location, Direction direction)
{
return CreateSide(location, direction, SideType.Door);
}
public Vector2I CreateWall(Vector2I location, Direction direction)
{
return CreateSide(location, direction, SideType.Wall);
}
public Vector2I CreateCorridor(Vector2I location, Direction direction)
{
return CreateSide(location, direction, SideType.Empty);
}
public bool AdjacentCellInDirectionIsCorridor(Vector2I location, Direction direction)
{
if (!HasAdjacentCellInDirection(location, direction))
{
return false;
}
var target = GetTargetLocation(location, direction);
return this[target].IsCorridor;
}
public bool AdjacentCellInDirectionIsVisited(Vector2I location, Direction direction)
{
if (!HasAdjacentCellInDirection(location, direction))
{
throw new InvalidOperationException("No adjacent cell exists for the location and direction provided.");
}
return this[location + direction.ToVector2I()].Visited;
}
private static IEnumerable<Vector2I> GetRoomPoints(int x, int y, int xlen, int ylen, Direction d)
{
// north and south share the same x strategy
// east and west share the same y strategy
Func<int, int, int> a = GetFeatureLowerBound;
Func<int, int, int> b = GetFeatureUpperBound;
if (d == Direction.North)
{
for (var xt = a(x, xlen); xt < b(x, xlen); xt++) for (var yt = y; yt > y - ylen; yt--) yield return new Vector2I(xt, yt);
}
else if (d == Direction.East)
{
for (var xt = x; xt < x + xlen; xt++) for (var yt = a(y, ylen); yt < b(y, ylen); yt++) yield return new Vector2I(xt, yt);
}
else if (d == Direction.South)
{
for (var xt = a(x, xlen); xt < b(x, xlen); xt++) for (var yt = y; yt < y + ylen; yt++) yield return new Vector2I(xt, yt);
}
else if (d == Direction.West)
{
for (var xt = x; xt > x - xlen; xt--) for (var yt = a(y, ylen); yt < b(y, ylen); yt++) yield return new Vector2I(xt, yt);
}
}
private void Move(Level level, Direction direction)
{
// TODO: Modify speed according to the friction value of the current block.
// TODO: Move slower if traveling on the background layer.
// TODO: Don't allow walking through a position where all layers, including the background, are empty.
MoveBy(level, direction, _speed);
}
private void MoveBy(Level level, Direction direction, float speed)
{
var vi = direction.ToVector2I();
MoveBy(level, new Vector2(vi.X * speed, vi.Y * speed));
}
private bool MakeRoom(IProgress<string> progress, int x, int y, int xlength, int ylength, Direction direction)
{
// define the dimensions of the room, it should be at least 4x4 tiles (2x2 for walking on, the rest is walls)
int xlen = GetRand(MIN_ROOM_COLUMNS, xlength);
int ylen = GetRand(MIN_ROOM_ROWS, ylength);
// the tile type it's going to be filled with
const Tile Floor = Tile.DirtFloor;
const Tile Wall = Tile.DirtWall;
// choose the way it's pointing at
var points = GetRoomPoints(x, y, xlen, ylen, direction).ToArray();
// Check if there's enough space left for it
if (points.Any(s =>
!MathHelper.IsInRange(s.Y, 0, _rows + 1) ||
!MathHelper.IsInRange(s.X, 0, _columns + 1) ||
GetCellType(s.X, s.Y) != Tile.Unused))
{
return false;
}
progress.Report($"Making room:int x={x}, int y={y}, int xlength={xlength}, int ylength={ylen}, int direction={direction}");
foreach (var p in points)
{
SetCell(p.X, p.Y, IsWall(x, y, xlen, ylen, p.X, p.Y, direction) ? Wall : Floor);
}
// yay, all done
return true;
}
private bool MakeCorridor(int x, int y, int length, Direction direction)
{
// define the dimensions of the corridor (er.. only the width and height..)
int len = this.GetRand(2, length);
const Tile Floor = Tile.Corridor;
int xtemp;
int ytemp = 0;
if (direction == Direction.North)
{
// north
// check if there's enough space for the corridor
// start with checking it's not out of the boundaries
if (x < 0 || x > this._columns) return false;
xtemp = x;
// same thing here, to make sure it's not out of the boundaries
for (ytemp = y; ytemp > (y - len); ytemp--)
{
if (ytemp < 0 || ytemp > this._rows) return false; // oh boho, it was!
if (GetCellType(xtemp, ytemp) != Tile.Unused) return false;
}
// if we're still here, let's start building
Corridors++;
for (ytemp = y; ytemp > (y - len); ytemp--)
{
this.SetCell(xtemp, ytemp, Floor);
}
}
else if (direction == Direction.East)
{
// east
if (y < 0 || y > this._rows) return false;
ytemp = y;
for (xtemp = x; xtemp < (x + len); xtemp++)
{
if (xtemp < 0 || xtemp > this._columns) return false;
if (GetCellType(xtemp, ytemp) != Tile.Unused) return false;
}
Corridors++;
for (xtemp = x; xtemp < (x + len); xtemp++)
{
this.SetCell(xtemp, ytemp, Floor);
}
}
else if (direction == Direction.South)
{
// south
if (x < 0 || x > this._columns) return false;
xtemp = x;
for (ytemp = y; ytemp < (y + len); ytemp++)
{
if (ytemp < 0 || ytemp > this._rows) return false;
if (GetCellType(xtemp, ytemp) != Tile.Unused) return false;
}
Corridors++;
for (ytemp = y; ytemp < (y + len); ytemp++)
{
this.SetCell(xtemp, ytemp, Floor);
}
}
else if (direction == Direction.West)
{
// west
if (ytemp < 0 || ytemp > this._rows) return false;
ytemp = y;
for (xtemp = x; xtemp > (x - len); xtemp--)
{
if (xtemp < 0 || xtemp > this._columns) return false;
if (GetCellType(xtemp, ytemp) != Tile.Unused) return false;
}
Corridors++;
for (xtemp = x; xtemp > (x - len); xtemp--)
{
this.SetCell(xtemp, ytemp, Floor);
}
}
// woot, we're still here! let's tell the other guys we're done!!
return true;
}
protected Vector2I GetTargetLocation(Vector2I location, Direction direction)
{
if (!HasAdjacentCellInDirection(location, direction))
{
throw new InvalidOperationException("No adjacent cell exists for the location and direction provided.");
}
if (direction.Equals(Direction.North))
{
return location - Vector2I.UnitY;
}
else if (direction.Equals(Direction.South))
{
return location + Vector2I.UnitY;
}
else if (direction.Equals(Direction.West))
{
return location - Vector2I.UnitX;
}
else if (direction.Equals(Direction.East))
{
return location + Vector2I.UnitX;
}
else
{
throw new InvalidOperationException("No adjacent cell exists for the location and direction provided.");
}
}
private static bool IsWall(int x, int y, int xlen, int ylen, int xt, int yt, Direction d)
{
Func<int, int, int> a = GetFeatureLowerBound;
Func<int, int, int> b = IsFeatureWallBound;
if (d == Direction.North)
{
return xt == a(x, xlen) || xt == b(x, xlen) || yt == y || yt == y - ylen + 1;
}
else if (d == Direction.East)
{
return xt == x || xt == x + xlen - 1 || yt == a(y, ylen) || yt == b(y, ylen);
}
else if (d == Direction.South)
{
return xt == a(x, xlen) || xt == b(x, xlen) || yt == y || yt == y + ylen - 1;
}
else if (d == Direction.West)
{
return xt == x || xt == x - xlen + 1 || yt == a(y, ylen) || yt == b(y, ylen);
}
throw new InvalidOperationException();
}