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POFilling open spaces in a grid top down
 

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  1. POFilling open spaces in a grid top down
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    <p>I am writing a match three engine and I succeed in creating the matching with using huge loops to find the matching items. Any ideas on how to fill the empty spaces with the items ( dropping down into the empty spaces ) and creating new items without excessive looping and if statements?</p> <p>Here is my relavant code so far.</p> <pre><code>public var rows:uint = 8; public var cols:uint = 7; public var cell:Array = new Array(); public var plot:Array = new Array(); public var height:int; public var width:int; public var relativePositions:Array = [{name:'top', position:-1}, {name:'bottom', position:1}, {name:'left', position:rows*-1}, {name:'right', position:rows*1}]; public var dictionary:Dictionary = new Dictionary(); public var matches:Array = new Array(); public function createGrid(target:*, displayObject:*, spacer:int) : void { var iterator:uint = 0; for(var c:uint = 0;c&lt;cols;c++){ for(var r:uint = 0;r&lt;rows;r++){ cell[iterator] = createGamePiece(); Sprite(cell[iterator]).name = String(iterator); Sprite(cell[iterator]).addEventListener(MouseEvent.CLICK, _handleGamePiece_CLICK); Sprite(cell[iterator]).addEventListener(MouseEvent.MOUSE_OVER, _handleGamePiece_MOUSE_OVER); Sprite(cell[iterator]).addEventListener(MouseEvent.MOUSE_OUT, _handleGamePiece_MOUSE_OUT); cell[iterator].y = cell[iterator].height * r + (spacer*r); cell[iterator].x = cell[iterator].width * c + (spacer*c); GamePiece(cell[iterator]).positionX = cell[iterator].x; GamePiece(cell[iterator]).positionY = cell[iterator].y; GamePiece(cell[iterator]).positionRow = r; GamePiece(cell[iterator]).positionCol = c; target.addChild(cell[iterator]); dictionary[String(iterator)] = cell[iterator] iterator++ } } } public function findRelativeMatches(targetSprite:Sprite) : void { targetSprite.alpha = .5; var rootPosition:Number = Number(targetSprite.name); for ( var i:int = 0; i &lt; relativePositions.length; i ++ ) { var key:String = String(rootPosition + relativePositions[i].position); // to do &gt;&gt; Not hardcoded to 'Pig' if (findSprite(key) != null &amp;&amp; GamePiece(targetSprite).color == GamePiece(findSprite(key)).color &amp;&amp; GamePiece(findSprite(key)).found == false) { var sprite:Sprite = findSprite(key); sprite.alpha = .5; GamePiece(sprite).found = true; matches.push(sprite); findRelativeMatches(sprite); }; }; targetSprite.addEventListener(MouseEvent.MOUSE_OUT, function() : void { if ( matches.length != 0 ) { for ( var j:int = 0 ; j &lt; matches.length ; j++ ) { Sprite(matches[j]).alpha = 1; GamePiece(matches[j]).found = false; } matches.splice(0); } }); } public function findSprite(key:String) : Sprite { var sprite:Sprite; dictionary[key] != undefined ? sprite = dictionary[key] : null; return sprite; } protected function _handleGamePiece_CLICK(event:MouseEvent):void { for ( var j:int = 0 ; j &lt; matches.length ; j++ ) { var sprite:Sprite = matches[j]; view.removeChild(matches[j]); } matches.splice(0); } public function createGamePiece() : Sprite { var gamePiece:GamePiece = new GamePiece(); return gamePiece; } </code></pre>
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    1. USBrian Russel Davis
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