Difference between revisions of "Actionscript"

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so far i have only understood the most basic of concepts, but now i will try to learn it well.
 
so far i have only understood the most basic of concepts, but now i will try to learn it well.
  
== trace ==
+
*[[actionscript sandbox]]
 
 
<pre>var message = "Hi there";
 
trace (message);                                    // prints "Hi there"
 
</pre>
 
 
 
<pre>var message = "yellow";
 
trace ("big " + message + " truck");                // prints "big yellow truck"
 
</pre>
 
 
 
== 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 ==
 
 
 
<pre>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"
 
}</pre>
 
 
 
<pre>= assigning value
 
== comparing values</pre>
 
 
 
== loops ==
 
 
 
<table><tr><td valign=top>this sequence... <pre>trace (101);
 
trace (102);
 
trace (103);
 
trace (104);
 
trace (105);</pre></td>
 
<td valign=top>is equal to:
 
<pre>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);</pre></td>
 
<td valign=top>is also equal to:
 
<pre>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
 
}</pre></td>
 
<td valign=top>they all print:
 
<pre>101
 
102
 
103
 
104
 
105</pre></td></tr></table>
 
 
 
== functions ==
 
 
 
sample:
 
 
 
<pre>function area(height, width){
 
return height * width;
 
}
 
area1 = area(10,15);
 
area2 = area(10,20);
 
area3 = area(10,20);
 
</pre>
 
 
 
== event based execution ==
 
 
 
<pre>someObject.onSomeEvent = someFunction;</pre>
 
 
 
for example:
 
<pre>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.
 
}
 
</pre>
 
 
 
== sample ==
 
 
 
=== quiz ===
 
 
 
<pre>
 
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
 
}
 
</pre>
 
 
 
== 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.
 
 
 
<pre>function T1over() {
 
_root.one_mc.gotoAndStop(2);
 
getURL('javascript:modifyT1();');
 
}
 
 
 
_root.one_mc.onRollOver = T1over;</pre>
 
 
 
== actionscript and javascript ==
 
 
 
*[http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_15683 flash to/from javascript call]
 
  
 
== tips ==
 
== tips ==

Revision as of 09:45, 17 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.

tips

  • use frame labels rather than frame numbers. you could call a starting frame "init".
  • dont use too many functions

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