Creating the Dice Battle Puzzle Game - The Essential Guide to Flash Games - page 375

Notice that systemTitle will be called after systemGameOver , yet they both play the same soundtrack.
Now, this is why we needed to create special functionality for playing soundtracks in SoundManager .
Because the game states in GameFrameWork (the class Main extends) are independent, systemTitle
has no idea that systemGameover was the last state, nor should it know that information. In fact, there
could be other states in the middle (e.g., show a high score screen and nag for microtransactions).
However, both states need SoundTrack1 to play, which is why we created the isSoundTrack Boolean
parameter for the SoundTrack.playSoundTrack function. The function is designed to play only one
soundtrack at a time. Recall, from Chapter 4, that it does this by creating a single SoundChannel that
is used to play soundtracks exclusively. Not only does it work for playing the soundtracks, but it
helps keep the separate functions in our state machine from having to know too much specific
information about how the game states flow.
To support playing these soundtracks in Main , we need to override systemTitle , systemNewGame ,
and systemGameOver . Each of these new function calls soundManager.playSound directly and then
calls super.[function name] to play its respective namesake function, so that Main can operate just
like it has in previous games in this topic.
override public function systemTitle():void {
soundManager.playSound(Main.SOUND_SOUND_TRACK_1,true,1000,0,1);
super.systemTitle();
}
override public function systemNewGame():void {
soundManager.playSound(Main.SOUND_SOUND_TRACK_2,true,1000,0,1);
super.systemNewGame();
}
override public function systemGameOver():void {
soundManager.playSound(Main.SOUND_SOUND_TRACK_1,true,1000,0,1);
super.systemGameOver();
}
Updating the Main.as class
Here is the full code listing for Main . We have styled in bold the major changes between this
version and the one in Chapter 8 for Color Drop:
package com.efg.games.dicebattle
{
import com.efg.framework.FrameWorkStates;
import com.efg.framework.GameFrameWork;
import com.efg.framework.BasicScreen;
import com.efg.framework.ScoreBoard;
import com.efg.framework.Game;
import com.efg.framework.SideBySideScoreElement;
import com.efg.framework.SoundManager;
import com.efg.framework.CustomEventSound;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;
import flash.geom.Point;
import flash.utils.Timer;