Dear Kirupa members,
I am trying to construct a small flash game using two classes for learning purposes. I have a small understanding of super-classes and sub-classes. The game partially works with one class doing stuff but when I try to incorporate the second class(things like creating a variable in one and then trying to trace it from the other class) I get errors. I’ve searched all over the internet but I haven’t really come across anything that explained how to make programs with multiple class communicating with each other where I was able to understand the tutorial 
I have a fla file with 3 movie clips with the linkage of
Bob
Projectile
StartButton
and then I have these two classes
package
{
import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.utils.Timer;
import flash.events.;
import flash.utils.getTimer;
//import DodgeSubClass.;
public class Dodge extends Sprite
{
private var mcBob:Bob;
static const mcBobDX = 200;
//how fast he strides
static const mcBobSS = 1;
private var leftArrow:Boolean = false;
private var rightArrow:Boolean = false;
private var upArrow:Boolean = false;
private var bottomArrow:Boolean = false;
private var mcStartButton:StartButton;
public var lastTime:int;
private var mcBobX:Number = 263;
private var mcBobY:Number = 199;
public var totalObjects:Array;
public var ballNumber:uint;
public var id = 22;
public function Dodge()
{
mcStartButton = new StartButton;
mcStartButton.x = 254;
mcStartButton.y = 231;
mcStartButton.gotoAndStop(1);
addChild(mcStartButton);
mcStartButton.addEventListener(MouseEvent.CLICK, startGame);
}
//start game
public function startGame (event:MouseEvent):void
{
//deleting and switching
removeChild(mcStartButton);
mcStartButton.removeEventListener(MouseEvent.CLICK, startGame);
mcBob = new Bob();
mcBob.gotoAndStop(1);
mcBob.x = mcBobX;
mcBob.y = mcBobY;
addChild(mcBob);
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDown);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUp);
addEventListener(Event.ENTER_FRAME, bobAnimation);
lastTime = getTimer();
}
//Animation
private function bobAnimation(event:Event):void
{
var timePassed:int = getTimer() - lastTime;
lastTime += timePassed;
//check boundries////////////////////////////////////////////////
if (leftArrow == true)
{
if (mcBob.x<18)
{
leftArrow = false;
mcBob.x= 23;
}
}
if (rightArrow == true)
{
if (mcBob.x>530)
{
rightArrow = false;
mcBob.x = 530;
}
}
if (upArrow == true)
{
if (mcBob.y<15)
{
upArrow = false;
mcBob.y = 13;
}
}
if (bottomArrow == true)
{
if (mcBob.y>381)
{
bottomArrow = false;
mcBob.y = 381;
}
}
///move object
if (leftArrow == true)
{
mcBobX += (mcBobDXtimePassed/1000)-1;
mcBob.rotation = 270;
}
if (rightArrow == true)
{
mcBobX += (mcBobDX*timePassed/1000);
mcBob.rotation = 90;
}
if (upArrow == true)
{
mcBobY += (mcBobDXtimePassed/1000)-1;
mcBob.rotation = 0;
}
if (bottomArrow == true)
{
mcBobY += (mcBobDX*timePassed/1000);
mcBob.rotation = 180;
}
mcBob.x = mcBobX;
mcBob.y = mcBobY;
}
//character facing different directions and strides
public function keyDown(event:KeyboardEvent):void
{
if (event.keyCode == 37)
{
leftArrow = true;
if (mcBob.x<23)
{
leftArrow = false;
mcBob.x = 23;
}
}
else if (event.keyCode == 39)
{
rightArrow = true;
}
else if (event.keyCode == 38)
{
upArrow = true;
}
else if (event.keyCode == 40)
{
bottomArrow = true;
}
}
public function keyUp(event:KeyboardEvent):void
{
if (event.keyCode == 37)
{
leftArrow = false;
}
else if (event.keyCode == 39)
{
rightArrow = false;
}
else if (event.keyCode == 38)
{
upArrow = false;
}
else if (event.keyCode == 40)
{
bottomArrow = false;
}
}
}
}
the second class I’m trying to use is
package {
public class DodgeSubclass extends Dodge {
public function DodgeSubclass() {
trace(“works”);
}
}
}
The program works but “works” does not trace in the output panel.
Thanks!
