By Zevan | December 4, 2009
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Actionscript:
...
// loop through until we find the root note
// grab the third and the fifth and exit the loop
for (var i:int = 0; i<leng; i++){
if (cMajor[i] == note){
third = cMajor[(i + 2) % leng];
[...]
Posted in misc | Tagged actionscript, as3, flash |
By Zevan | December 1, 2009
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Actionscript:
[SWF(width = 800, height = 600, frameRate = 60)]
import com.actionsnippet.qbox.*;
stage.frameRate = 60;
var sim:QuickBox2D = new QuickBox2D(this);
sim.createStageWalls();
sim.start();
var output:TextField = new TextField();
output.text = "Click anywhere to add points to a polygon. Hit any key to test.\n\n";
output.x = output.y = 50;
with(output) width = 300, height = 400, border = true, selectable = true, wordWrap = [...]
By Zevan | November 29, 2009
CLICK HERE TO COPY
Actionscript:
// print some floats as fractions
printFraction(0.5);
printFraction(0.75);
printFraction(0.48);
// try something a little more complex
var float:Number = 0.98765432;
trace("\na more complex example:");
printFraction(float);
var frac:Array = asFraction(float);
trace("double check it:");
trace(frac[0] + "/" + frac[1] +" = " + frac[0] / frac[1]);
/* outputs:
0.5 = 1/2
0.75 = 3/4
0.48 = 12/25
a more complex example:
0.98765432 = 12345679/12500000
double check it:
12345679/12500000 = 0.98765432
*/
function printFraction(n:Number):void{
[...]
Posted in Math, misc | Tagged actionscript, as3, flash |
By Zevan | November 28, 2009
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Actionscript:
trace(gcf(75,145));
// outputs 5
function gcf(a:int, b:int):int{
var remainder:int;
var factor:Number = 0;
while (1){
if (b> a){
var swap:int = a;
a = b;
b = swap;
}
remainder [...]
Posted in Math | Tagged actionscript, as3, flash |
By Zevan | November 27, 2009
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Actionscript:
egyptianMultiply(12, 99);
// trace(12 * 99) // test to make sure it works
/* outputs:
/64 768
/32 384
16 192
8 96
4 48
/2 24
/1 12
---
1188
*/
function egyptianMultiply(valueA:Number, valueB:Number):void {
var left:Array = [];
var right:Array = []
// swap if valueB is smaller than value A
if (valueB <valueA){
[...]
By Zevan | November 25, 2009
CLICK HERE TO COPY
Actionscript:
var container:Sprite = new Sprite();
container.x = stage.stageWidth / 2;
container.y = stage.stageHeight / 2;
addChild(container);
var redBox:Sprite = new Sprite();
redBox.graphics.beginFill(0xFF0000);
redBox.graphics.drawRect(-50,-250,100,500);
redBox.rotationZ = 10;
container.addChild(redBox);
var logos:Array = []
var elements:Array = [];
elements.push({element:redBox, z:0});
// add the logos
for (var i:int = 0; i<6; i++){
var logoContainer:MovieClip = new MovieClip();
var logoText:TextField = new TextField();
logoText.defaultTextFormat = new TextFormat("_sans", [...]
By Zevan | November 23, 2009
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Actionscript:
var connect:Function = function(xp:Number, yp:Number, col:uint=0):Function{
graphics.lineStyle(0,col);
graphics.moveTo(xp, yp);
var line:Function = function(xp:Number, yp:Number):Function{
graphics.lineTo(xp, yp);
return line;
}
return line;
}
// draw a triangle
connect(200,100)(300,300)(100,300)(200, 100);
// draw a box
connect(100,100, 0xFF0000)(150,100)(150,150)(100, 150)(100,100);
This is one of those techniques that I never really get tired [...]
By Zevan | November 18, 2009
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Actionscript:
import com.actionsnippet.qbox.*;
import Box2D.Dynamics.*
stage.frameRate = 60;
var sim:QuickBox2D = new QuickBox2D(this, {debug:true});
// get at the b2DebugDraw instance
var debug:b2DebugDraw = sim.w.m_debugDraw;
debug.m_drawScale = 30.0;
debug.m_fillAlpha = 0.5;
debug.m_alpha = 0.5;
debug.m_lineThickness = 1.0;
debug.m_drawFlags = 0xFF;
sim.createStageWalls();
for (var i:int = 0; i<10; i++){
sim.addBox({x:3 + i, y:3 + i, width:2, height:0.5});
}
sim.addCircle({x:12, y:5, radius:2});
sim.start();
sim.mouseDrag();
Note: This snippet requires the QuickBox2D library
This snippet [...]
By Zevan | November 16, 2009
CLICK HERE TO COPY
Actionscript:
var slider:MovieClip = makeSlider();
slider.addEventListener(Event.CHANGE, function(evt:Event):void{
trace(evt.currentTarget.percent);
});
function makeSlider():MovieClip{
var slider:MovieClip = MovieClip(addChild(new MovieClip()));
var circle:Sprite = Sprite(slider.addChild(new Sprite()));
with (circle.graphics) beginFill(0x000000), drawCircle(0,0,10);
var line:Shape = Shape(slider.addChild(new Shape()));
with (line.graphics) [...]
Posted in UI | Tagged actionscript, as3, flash |
By Zevan | November 7, 2009
Since the release of QuickBox2D 1.0 two bugs were discovered by numerous developers. The first bug was the inability to properly destroy group objects. The second bug was a small memory leak that caused most QuickObjects to remain in memory. Both of these bugs are now resolved.
Download QuickBox2D 1.1
Testing the memory leak. In QuickBox2D 1.0 [...]