Introducing to AS3.0 programming

Introducing to AS3 Programming
ENGR. SOLIEL G. MUTYA
DLS-CSB
MAY 2016

ACTIONSCRIPT 3.0 DATA TYPES
• AS3 is a structured language as well as an
object-oriented language.
• It is a structured because it is built around
functions.
• It is an OOP because it is built around classes
and objects. Data identified for I-P-O will need
to be stored as data objects.

AS3 DATA TYPES
• Data type is defined as a type of data and a
set of operations that can be performed on
that data.
• PRIMITIVE data type is on that is provided as
an integral part of AS3 language and requires
no external code.

AS3 DATA TYPES
Data Type Definition Example
INTEGER Used to store whole numbers. Age:int
UNSIGNED INTEGER Used for storing and working
with positive whole numbers.
X:uint
NUMBER A floating-point number, that can
be the number zero or any
positive or negative number that
contains a decimal point.
Pi:Number
STRING Used to store textual information. Name: String
BOOLEAN Can hold only one of two values:
TRUE or FALSE.
Answer: Boolean

VARIABLE AND CONSTANT
DECLARATIONS
• To allocate memory for a data object, programs
require a special statement called DECLARATION.
• Data objects come in two forms: VARIABLE and
CONSTANT.
• A Constant is a static data object – whose value
will not change during the program execution.
(const to declare a constant)
• A Variable is a dynamic data object. (var to
declare a variable)

IDENTIFIERS
• Identifiers are the names we assign to the
data objects we declare.
– RULE 1: Identifiers must start with a letter of the
alphabet or an underscore(_).
– RULE 2: Identifiers must consist of only letters,
digits and underscores.
– RULE 3: AS3 is case sensitive.
– RULE 4: Do not use AS3 Keywords in declaring
identifiers/Variable name.

COLOR CODES
• Variable Name –
• Data Type –
• Instance Name –
• Function Name –
• AS3 Keywords –

CONTINUOUS GROWING
var growthRate:Number = 2;
circle_mc.addEventListener(Event.ENTER_FRAME, grow);
function grow(e:Event):void
{
e.target.width += growthRate;
e.target.height += growthRate;
}

GROWING WITH TARGET SIZE
var maxSize:Number = 150;
circle_mc.addEventListener(Event.ENTER_FRAME, grow);
function grow(e:Event):void
{
if(e.target.width>= maxSize)
{
circle_mc.removeEventListener(Event.ENTER_FRAME, grow);
}
}

GROWING AND SHRINKING (ENTER
FRAME)
var maxSize:Number = 150;
var minSize:Number = 100;
var scaleMode:String = "grow";
circle_mc.addEventListener(Event.ENTER_FRAME, growShrink);
function growShrink(e:Event):void
{
if(scaleMode == "grow")
{

GROWING AND SHRINKING (ENTER
FRAME)if(e.target.width>= maxSize)
{
scaleMode = "shrink";
}
}
else if(scaleMode == "shrink")
{
e.target.width -= growthRate;
e.target.height -= growthRate;
if(e.target.width<= minSize)
{
scaleMode = "grow";
}
}
}

GROWING AND SHRINKING WITH
MOUSE EVENTS
var maxSize:int = 200;
var minSize:int = 150;
var scaleMode:String = "shrink";
var clickMode:String = "start";
circle_mc.addEventListener(MouseEvent.CLICK, startStop);
function startStop(e:MouseEvent):void
{
if (clickMode == "start")
{
circle_mc.addEventListener(Event.ENTER_FRAME, growShrink);
clickMode = "stop";
}

MOUSE EVENTS
else if(clickMode == "stop")
{
circle_mc.removeEventListener(Event.ENTER_FRAME, growShrink);
clickMode = "start";
}
}
function growShrink(e:Event):void
{
if (scaleMode == "shrink")
{
e.target.width -= growthRate;
e.target.height -= growthRate;

MOUSE EVENTS
if (e.target.width<= minSize)
{
scaleMode = "grow";
}
}
else if (scaleMode == "grow")
{
if (e.target.width>= maxSize)
{
scaleMode = "shrink";
}
}
}

FADE-IN AND FADE-OUT
var fadeRate:Number = .05;
var maxVal:int = 1;
var minVal:int = 0;
var fadeMode:String = "out";
circle_mc.addEventListener(Event.ENTER_FRAME, fade);
function fade(e:Event):void
{
if(fadeMode == "out")
{
e.target.alpha -= fadeRate;
if(e.target.alpha<= minVal)
{
fadeMode = "in";
}
}

FADE-IN AND FADE-OUT
else if(fadeMode == "in")
{
e.target.alpha += fadeRate;
if(e.target.alpha>= maxVal)
{
fadeMode = "out";
}
}
}

FADE-IN AND FADE-OUT WITH
BUTTONS
var fadeRate:Number = .05;
var maxVal:int = 1;
var minVal:int = 0;
var fadeMode:String = "out";
start_btn.addEventListener(MouseEvent.CLICK, startFade);
stop_btn.addEventListener(MouseEvent.CLICK, stopFade);

BUTTONS
function startFade(e:MouseEvent):void
{
circle_mc.addEventListener(Event.ENTER_FRAME, fade);
}
function stopFade(e:MouseEvent):void
{
circle_mc.removeEventListener(Event.ENTER_FRAME, fade);
}

BUTTONSfunction fade(e:Event):void
{
if (fadeMode == "out")
{
e.target.alpha -= fadeRate;
if (e.target.alpha<= minVal)
{
fadeMode = "in";
}
}
else if (fadeMode == "in")
{
e.target.alpha += fadeRate;
if (e.target.alpha>= maxVal)
{
fadeMode = "out";
}
}
}

UP AND DOWN BUTTON
function goUp(e:MouseEvent):void
{
starfish_mc.y = starfish_mc.y - 10;
}
function goDown(e:MouseEvent):void
{
starfish_mc.y = starfish_mc.y + 10;
}
up_btn.addEventListener(MouseEvent.CLICK, goUp);
down_btn.addEventListener(MouseEvent.CLICK, goDown);

NEXT AND BACK BUTTON
stop();
next_btn.addEventListener(MouseEvent.CLICK, goNext);
back_btn.addEventListener(MouseEvent.CLICK, goBack);
function goNext(e:MouseEvent):void {
nextFrame();
}
function goBack(e:MouseEvent):void {
prevFrame();
}

GROWING AN OBJECT USING UP AND
DOWN BUTTON
up_btn.addEventListener(MouseEvent.CLICK, goUp);
down_btn.addEventListener(MouseEvent.CLICK,
goDown);
function goUp(e:MouseEvent):void {
starfish_mc.width += 10;
starfish_mc.height += 10;
}
function goDown(e:MouseEvent):void {
starfish_mc.width -= 10;
starfish_mc.height -= 10;
}

Introducing to AS3.0 programming

Recommended

More Related Content

Similar to Introducing to AS3.0 programming (20)

Recently uploaded (20)

Introducing to AS3.0 programming