Creating the Color Drop Casual Puzzle Game - The Essential Guide to Flash Games - page 350

checkForFallingBlocks is called when we need to find out if any Block objects on the screen are
currently moving. The function loops through all the Blocks in the board 2D array, and if any one
Block is still moving ( isFalling = true ), it returns false.
public function checkForFallingBlocks():Boolean {
var isFalling:Boolean = false;
for (var r:int = 0; r < board.length; r++) {
for (var c:int = 0; c < board[r].length; c++) {
tempBlock =board[r][c];
if (tempBlock.isFalling) {
isFalling = true;
}
}
}
return isFalling;
}
checkForFadingBlocks is called when we need to find out if any Block objects on the screen are
currently fading. The function loops through all the Blocks in the board 2D array, and if any one
Block is still fading ( isFading = true ), it returns false .
public function checkForFadingBlocks():Boolean {
var isFading:Boolean = false;
for (var r:int = 0; r < board.length; r++) {
for (var c:int = 0; c < board[r].length; c++) {
tempBlock =board[r][c];
if (tempBlock.isFading) {
isFading = true;
}
}
}
return isFading;
}
Adding blocks to the screen
When the gameState is equal to GameStates.STATE_START_REPLACING , runGame calls replaceBlocks
to put our Block objects on the screen. We will write this function in a way that it will be universal for
our game: no matter when blocks need to be replaced (at the beginning of a level or after the user
clicks and removes blocks), it will operate the same way. We replace blocks very simply: we loop
through our 2D array stored in board , and when we find a row , col combination that is equal to null
( board[r][c] == null ), we call addBlock(r,c) to fill it. That's it. addBlock then does most of the
interesting work.
public function replaceBlocks():void {
for (var r:int = 0; r < board.length; r++) {
for (var c:int = 0; c < board[r].length; c++) {
if (board[r][c] == null) {
board[r][c] = addBlock(r,c);
}
}
}
}