Creating the Full No Tanks! Game - The Essential Guide to Flash Games - page 285

regions.push(tempRegion);
}

private function setCurrentRegion(object:TileByTileBlitSprite):void {

var regionLength:int = regions.length - 1;

for (var regionCtr:int = 0; regionCtr <= regionLength; regionCtr++) {
tempRegion = regions[regionCtr];
if (object.currCol >= tempRegion.col1 &&

object.currCol <= tempRegion.col2 &&

object.currRow >= tempRegion.row1 &&

object.currRow <= tempRegion.row2) {

object.currentRegion = regionCtr;
}
}
}//** end added in iteration #5
The setCurrentRegion function takes a TileByTileBlitSprite in as a parameter called object .
Using the currCol and currRow attributes of the object , it loops through the four regions in the
regions array to find which region the object currently is in. The object's currentRegion attribute
is changed to the detected region number.

Changing the readSpriteData function
We now need to modify the readSpriteData function to create new enemy tanks and add them to
the enemyTanks array. In the existing switch:case statement inside the readSpriteData function,
you will need to add a case for the enemy tanks. Add the following code below the case
SPRITE_PLAYER code. We have included the SPRITE_PLAYER case for reference. It should match
what you already have in the GameDemoIteration5.as file.
case SPRITE_PLAYER:
player.animationLoop = false;
playerStartRow= rowCtr;
playerStartCol= colCtr;
player.currRow = rowCtr;
player.currCol = colCtr;
player.currentDirection = MOVE_STOP;
break;

//** added in iteration #5

case SPRITE_ENEMY:

tempEnemy = new TileByTileBlitSprite(tileSheet, enemyFrames, 0);

tempEnemy.x=(colCtr * tileWidth)+(.5*tileWidth);
tempEnemy.y = (rowCtr * tileHeight) + (.5 * tileHeight);

tempEnemy.currRow = rowCtr;
tempEnemy.currCol = colCtr;

setCurrentRegion(tempEnemy);