Difference between revisions of "Actionscript"
From Wikicliki
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*[[Actionscript Sandbox]] | *[[Actionscript Sandbox]] | ||
− | *[http://moock.org/lectures/groundUpAS3/ Actionscript from the Ground | + | *[http://moock.org/lectures/groundUpAS3/ Moock's Actionscript 3.0 from the Ground Up] |
Revision as of 16:22, 23 June 2008
actionscript, that infuriatingly intractable marshmellow fluff... so far i have only understood the most basic of concepts, but now i will try to learn it well.
Contents
code hinting suffixes/names
to keep in good form you should keep to these common suffixes so that any programmer can read your code easily without finding it utterly incomprehensible.
variables:
- must start with letters, underscore or dollarsign.
- no hyphens or other punctuation besides the underscore.
- cannot start with a number.
- are case-insensitive, but keep it constant or you might get confused
- xxx_str // means the variable contains a string
- xxx_arr // means the variable contains an array
conditionals
var message = "yellow"; trace ("big " + message + " truck"); // prints "big yellow truck" if (message == "yellow") { trace ("yes, i did say big yellow truck."); // prints "yes, i did say big yellow truck" }
= assigning value == comparing values
loops
this sequence... trace (101); trace (102); trace (103); trace (104); trace (105); |
is equal to:
var x = 101; trace (x); x = x + 1; trace (x); x = x + 1; trace (x); x = x + 1; trace (x); x = x + 1; trace (x); |
is also equal to:
var x = 101; while (x <= 105) { // as long as x is less than 105... trace (x); x = x + 1; // ...continue to trace x but add one each time } |
they all print:
101 102 103 104 105 |
functions
sample:
function area(height, width){ return height * width; } area1 = area(10,15); area2 = area(10,20); area3 = area(10,20);
event based execution
someObject.onSomeEvent = someFunction;
for example:
skaGirl.onRelease = dirtyskanking; // the object named skaGirl will dirtyskank when mouse is released function dirtyskanking () { this._parent._rotation = 360; // defines the rotation of the dirtyskanking. }
sample
quiz
button1.onRelease = function () { // on pressing button 1 this._parent.q1answer = 1; // assigning 1 to q1 answer this._parent.gotoAndStop("q2") // after which we go to frame labelled as q2 } if (q1answer == 3) { // if answer was right totalCorrect = totalCorrect++; // increase number of total correct qns by one }
confused about root, this, and parent? so am i!
this piece of code would work ON a frame on the main stage, one_mc being an object onnit.
function T1over() { _root.one_mc.gotoAndStop(2); getURL('javascript:modifyT1();'); } _root.one_mc.onRollOver = T1over;
actionscript and javascript
tips
- use frame labels rather than frame numbers. you could call a starting frame "init".
- dont use too many functions