public bool isValid(Pair to, Pair from, PegBoard pegBoard, Player.Color currentPlayerColor)
{
int moveUpDown = from.row - to.row;
int moveLeftRight = from.col - to.col;
if (pegBoard.checkColor(from) != currentPlayerColor || // correct color
pegBoard.isEmpty(from) || // selected empty peg slot
!pegBoard.isEmpty(to)) // dropped on occupied slot
{
// conditions for immediate failure
return(false);
}
else if (Math.Abs(moveUpDown) == 1 ||
Math.Abs(moveLeftRight) == 1)
{
// jump OR move 1
return(true);
}
else if (Math.Abs(moveUpDown) == 2
^ Math.Abs(moveLeftRight) == 2) // xor jump (2)
{
// Jumps A color and Jumps OTHER color
return(!pegBoard.isEmpty(from.row - moveUpDown / 2, from.col - moveLeftRight / 2) &&
pegBoard.checkColor(from.row - moveUpDown / 2, from.col - moveLeftRight / 2) != currentPlayerColor);
}
else
{
// Don't jump the rainbow!
return(false);
}
}
private bool isValid(Pair to, Pair from, PegBoard pegBoard, Player.Color currentPlayerColor)
{
int moveUpDown = from.row - to.row;
int moveLeftRight = from.col - to.col;
if (to.row < 0 || to.col < 0 || from.row < 0 || from.col < 0 ||
to.row > boardSize || to.col > boardSize || from.row > boardSize || from.col > boardSize)
{
return(false);
}
else if (pegBoard.checkColor(from) != currentPlayerColor || // correct color
pegBoard.isEmpty(from) || // selected empty peg slot
!pegBoard.isEmpty(to)) // dropped on occupied slot
{
// Conditions for immediate failure
return(false);
}
else if (Math.Abs(moveUpDown) == 1 &&
Math.Abs(moveLeftRight) == 1)
{
// Jump
return(true);
}
else if (Math.Abs(moveUpDown) + Math.Abs(moveLeftRight) == 1)
{
// Move peg over 1
return(true);
}
else if (Math.Abs(moveUpDown) + Math.Abs(moveLeftRight) == 2)
{
// jump (2,0) or (0,2) --> the (1,1) case has already been tested
return(!pegBoard.isEmpty(from.row - moveUpDown / 2, from.col - moveLeftRight / 2) &&
pegBoard.checkColor(from.row - moveUpDown / 2, from.col - moveLeftRight / 2) != currentPlayerColor);
// Jumps A color and Jumps OTHER color
}
else
{
// Don't jump the rainbow!
return(false);
}
}