Game Development Reference
In-Depth Information
private var CrosshairsGif:Class;
*/
Next, we define the constructor itself. Recall that this function sets
gameWidth
and
gameHeight
as
passed in by
Main
but doesn't do anything else. A bit later, we will use
gameWidth
and
gameHeight
to calculate important values (i.e., where to place
Enemy
planes and
Ship
objects on the screen).
FlakCannon
now waits for the
Main
class to call its functions. The first will be
newGame()
.
public function FlakCannon(gameWidth:int,gameHeight:int) {
this.gameWidth=gameWidth;
this.gameHeight=gameHeight;
}
Starting a new game
The
newGame()
function is one of the places where the
FlakCannon
class interfaces with the
Main
class. If you recall from Part 1, an instance of a
Game
class (or a class extended from
Game
like
FlakCannon
) does nothing without receiving calls from the
Main
class. This allows
Main
to be in
control (i.e., take care of the boring stuff like showing title screens), and it also allows
FlakCannon
to take care of the game logic (i.e., do the cool stuff like make Flak Cannon shells go boom!).
Here is the full code for the function:
override public function newGame():void {
level = 0 ;
score = 0;
ships = 3;
shots = 0;
extraShipCount=0;
isGameOver = false;
dispatchEvent(new CustomEventScoreBoardUpdate(
CustomEventScoreBoardUpdate.UPDATE_TEXT,Main.SCORE_BOARD_SCORE,"0"));
dispatchEvent(new CustomEventScoreBoardUpdate(
CustomEventScoreBoardUpdate.UPDATE_TEXT,Main.SCORE_BOARD_SHOTS,String(shots)));
}
The code in
newGame()
is pretty simple, with only a couple minor changes from Super Click. First,
we set the basic game variables to their initial values.
level = 0 ;
score = 0;
ships = 3;
shots = 0;
extraShipCount=0;
isGameOver = false;
Next, we set-up some events that we will use to tell Main some pertinent information about the
player progress in the game.
dispatchEvent(new CustomEventScoreBoardUpdate(
CustomEventScoreBoardUpdate.UPDATE_TEXT,Main.SCORE_BOARD_SCORE,"0"));
dispatchEvent(new CustomEventScoreBoardUpdate(
CustomEventScoreBoardUpdate.UPDATE_TEXT,Main.SCORE_BOARD_SHOTS,String(shots)));
