Finally it's time for the computer to make its move. At the moment it will be a random move, so you just need to check for legal columns to move, and randomly choose one of them.
The idea: Choose a random column among the possible ones and place the disc.
The development: This is computerMove function, to be inserted in disc_movieclip.as:
private function computerMove():void {
var possibleMoves:Array=par.possibleColumns();
var cpuMove:uint=Math.floor(Math.random()*possibleMoves.length)
currentColumn=possibleMoves[cpuMove];
x=35+60*currentColumn;
currentRow=par.firstFreeRow(currentColumn,currentPlayer);
fallingDestination=35+currentRow*60;
}Apart from computer decision, it works as if the player was human.
var possibleMoves:Array=par.possibleColumns();
possibleMoves variable stores the array with all legal columns.
var cpuMove:uint=Math.floor(Math.random()*possibleMoves.length)
cpuMove is a random number between zero (included) and the number of elements in...