game media . jonah warren

Design Lab 5: Game Media [ Monday 6pm - Rm 908]

instructor: Jonah Warren
email: jonah AT feedtank DOT com
url: http://www.playfulsystems.com/teaching/2006/gamemedia

An Object Oriented Light (Version 1)
[ Download the FLA ]

The following program has the following structure:

The following code on in a file named Light.as.

class Light {
	var isLightOn:Boolean;

	function Light() {
		isLightOn = false;
	}

	function turnOff() {
		trace("Turning light off.");
		isLightOn = false;
	}

	function turnOn() {
		trace("Turning light on.");
		isLightOn = true;
	}

	function printState() {
		if (isLightOn) trace("Light is on.");
		else trace("Light is off.");
	}
}

The following code on frame 1:

var light:Light;

light = new Light();

light.printState();
light.turnOn();
light.printState();
light.turnOff();
light.printState();

This program will print out the following:

Light is off.
Turning light on.
Light is on.
Turning light off.
Light is off.

An Object Oriented Light (Version 2)
[ Download the FLA ]

The following program has the following structure:

The following code on in a file named Light.as.

class Light extends MovieClip{
	var isLightOn:Boolean;

	function Light() {
		isLightOn = false;
	}

	function turnOff() {
		trace("Turning light off.");
		this.gotoAndStop("off");
		isLightOn = false;
	}

	function turnOn() {
		trace("Turning light on.");
		this.gotoAndStop("on");
		isLightOn = true;
	}

	function printState() {
		if (isLightOn) trace("Light is on.");
		else trace("Light is off.");
	}

	function getState():Boolean {
		return isLightOn;
	}
}

A MovieClip called with an instance name "light" on frame 1. Click linkage, "Export for Actionscript," and enter "Light" under AS 2.0 Class.
A MovieClip called with an instance name "lightSwitch" on frame 1.
The following code on frame 1:

stop();

lightSwitch.onPress = function() {
	if (light.getState()) light.turnOff();
	else light.turnOn();
}

[ Click on the switch to turn the light on and off. ]