Creating the Full No Tanks! Game - The Essential Guide to Flash Games - page 288

currCol attributes and call the updateTile function of the enemy tank. We do this to each enemy
tank by looping through the enemyTanks array.
This is not a complete rewrite of the update function. You should add this code in the current
update function under the existing section for the player rendering that we have already placed
into the function. Here are the additions to the update function that will handle enemy tanks:
//** added iteration #6
var enemyLength:int = enemyList.length-1;
for (var ctr:int = enemyLength; ctr >= 0; ctr--) {
tempEnemy = enemyList[ctr];

tempEnemy.nextX = tempEnemy.x + tempEnemy.dx*tempEnemy.moveSpeed;
tempEnemy.nextY = tempEnemy.y + tempEnemy.dy * tempEnemy.moveSpeed;

//check to see is enemy off side of screen then set in tunnel
if (tempEnemy.y <yMin || tempEnemy.y>yMax ||

tempEnemy.x<xMin || tempEnemy.x >xMax){
tempEnemy.inTunnel = true;
}else {
tempEnemy.inTunnel = false;
}

if (tempEnemy.inTunnel) {
switch(tempEnemy.currentDirection) {

case MOVE_UP:
if (tempEnemy.nextY == yTunnelMin){
tempEnemy.nextY=yTunnelMax
}else if (tempEnemy.nextY == yMax) {
tempEnemy.inTunnel = false;
}
break;

case MOVE_DOWN:
if (tempEnemy.nextY == yTunnelMax){
tempEnemy.nextY = yTunnelMin;
}else if (tempEnemy.nextY == yMin) {
tempEnemy.inTunnel = false;
}
break;

case MOVE_LEFT:
if (tempEnemy.nextX == xTunnelMin){
tempEnemy.nextX = xTunnelMax;
}else if (player.nextX == xMax) {
tempEnemy.inTunnel = false;
}
break;

case MOVE_RIGHT:
if (tempEnemy.nextX == xTunnelMax) {
tempEnemy.nextX = xTunnelMin;
}else if (player.nextX == xMin) {
tempEnemy.inTunnel = false;