private bool isLegalShove(BoardPiece argPiece)
{
// Shove: anywhere there is a straight (orthogonal or diagonal) line of adjacent trolls on the board,
// they may shove the endmost troll in the direction continuing the line, up to as many spaces as there
// are trolls in the line.
// As in a normal move, the troll may not land on an occupied square, and any dwarfs in the eight squares
// adjacent to its final position may immediately be captured.
// Trolls may only make a shove if by doing so they capture at least one dwarf.
// if our target location is not occupied
if (!argPiece.isOccupied())
{
// and it is in a line with our location
if (isInLine(square.getLocation(), argPiece.getLocation()))
{
// if this location neighbours any dwarves
if (neighboursDwarves(argPiece))
{
int distance = this.getDistance(square.getBoardPosition(), argPiece.getBoardPosition());
NEIGHBOUR direction = ThudPiece.getOppositeNeighbour(this.getDirection(square.getLocation(), argPiece.getLocation()));
// iterate over the squares in the direction opposite of our destination
// equal to the distance we wish to move
// if all squares contain a troll, the shove is legal
BoardPiece bp = square;
for (int i = 0; i < distance; i++)
{
if (bp.isOccupied())
{
if (bp.getOccupant() is TrollPiece)
{
if (bp.hasNeighbour(direction))
{
bp = (BoardPiece)bp.getNeighbour(direction);
}
}
else
{
return(false);
}
}
else
{
return(false);
}
}
return(true);
}
}
}
return(false);
}
private bool isLegalHurl(BoardPiece argPiece)
{
// if our target location is occupied
if (argPiece.isOccupied())
{
// ... by a troll
if (argPiece.getOccupant() is TrollPiece)
{
// and it is in a line with our location
if (isInLine(square.getLocation(), argPiece.getLocation()))
{
int distance = this.getDistance(square.getBoardPosition(), argPiece.getBoardPosition());
NEIGHBOUR direction = ThudPiece.getOppositeNeighbour(this.getDirection(square.getLocation(), argPiece.getLocation()));
// iterate over the squares in the direction opposite of our destination
// equal to the distance we wish to move
// if all squares contain a dwarf, the hurl is legal
BoardPiece bp = square;
for (int i = 0; i < distance; i++)
{
if (bp.isOccupied())
{
if (bp.getOccupant() is DwarfPiece)
{
if (bp.hasNeighbour(direction))
{
bp = (BoardPiece)bp.getNeighbour(direction);
}
else if (i != distance - 1)
{
return(false);
}
}
else
{
return(false);
}
}
else
{
return(false);
}
}
return(true);
}
}
}
return(false);
}
private bool neighboursDwarves(BoardPiece argPiece)
{
foreach (NEIGHBOUR n in Enum.GetValues(typeof(NEIGHBOUR)))
{
if (argPiece.hasNeighbour(n))
{
BoardPiece p = (BoardPiece)argPiece.getNeighbour(n);
if (p.isOccupied())
{
if (p.getOccupant() is DwarfPiece)
{
return(true);
}
}
}
}
return(false);
}
public override bool isLegalMove(BoardPiece argPiece)
{
// early out
if (logic.getTurn() == SIDE.TROLL)
{
return(false);
}
Point myLocation = square.getBoardPosition();
Point destination = argPiece.getBoardPosition();
// early out
if (!isInLine(myLocation, destination))
{
return(false);
}
GameLogic.NEIGHBOUR direction = getDirection(myLocation, destination);
BoardPiece ep = (BoardPiece)square.getNeighbour(direction);
// check all squares in the direction of our destination
while (!ep.isOccupied())
{
if (ep == argPiece)
{
return(true);
}
if (ep.hasNeighbour(direction))
{
ep = (BoardPiece)ep.getNeighbour(direction);
}
else
{
break;
}
}
return(false);
}
private void setHighlights(bool on)
{
// early out
if (logic.getTurn() == SIDE.TROLL)
{
return;
}
foreach (NEIGHBOUR n in Enum.GetValues(typeof(NEIGHBOUR)))
{
if (square.hasNeighbour(n))
{
BoardPiece ep = (BoardPiece)square.getNeighbour(n);
while (!ep.isOccupied())
{
if (on)
{
ep.highlight(false);
}
else
{
ep.resetImage();
}
if (ep.hasNeighbour(n))
{
ep = (BoardPiece)ep.getNeighbour(n);
}
else
{
break;
}
}
}
}
}
