findArea.as

public function findArea(blockType:int = 10):void
{
  var largest:int = 0;
  var current:int = 0;
  var root:int = 0;
  var source:int = 0;
  var tempWidth:int = 0;
  for (var i:int = 0; source < worldBuildArray.length; i++) { //Finds largest cluster of matching tiles, vertically
    if (((i % worldWidth) == 0 ? 20 : i % worldWidth) - (source % worldWidth) == tempWidth && tempWidth != 0) i +=
    (worldWidth - tempWidth); //Shifts to next row of temp rect.
    if (i > worldBuildArray.length) { // Delimits at bottom of map
      i = source+1;
      tempWidth = 0;
      if (current > largest) largest = current;
      current = 0;
    }
    if (current == 0) source = i;
    if (worldBuildArray[i] == blockType && (tempWidth != 0 || Math.floor(source/worldWidth) ==
    Math.floor(i/worldWidth))) { //Main block check/delimiter at edge of map.
        current++;
        if (current > largest) {
          largest = current;
          root = source;
        }
      } else {
        if (tempWidth == 0 && source != i) { // When detect collision, set tempWidth and shift row
          tempWidth = current;
          i += (worldWidth - tempWidth);
        } else { // If collision within temp rect, reset to 'source.'
          tempWidth = 0;
          current = 0;
          i = source;
        }
      }
    //trace(source + " / " + i);
  }
}