Pixel Perfect Particles with Basic Physics
@author duarte peixinho
mail: duarte.peixinho@gmail.com
Pixel Perfect Particles with Basic Physics
package
{
import flash.display.Loader;
import flash.system.LoaderContext;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.events.TextEvent;
import flash.geom.Rectangle;
import flash.geom.Point;
import flash.net.URLRequest;
import flash.text.TextField;
import flash.text.TextField;
import flash.text.TextFieldAutoSize;
import flash.text.TextFieldType;
import flash.text.TextFormat;
import flash.text.AntiAliasType;
import flash.display.BlendMode;
import flash.system.Security;
import flash.display.Stage;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.display.StageQuality;
/**
* @author duarte peixinho
* mail: duarte.peixinho@gmail.com
* Pixel Perfect Particles with Basic Physics
*/
[SWF(width = "600", height = "400", backgroundColor = "#000000", frameRate = "60")]
public class Main extends Sprite
{
private var loader:Loader = new Loader();
private var imageSourceBitmapData:BitmapData;
private var imageSource:Bitmap;
private var mouseClicked:Boolean = false;
private var Pixels:Array = new Array();
private var text:TextField = new TextField();
public function Main():void
{
stage.quality = StageQuality.LOW;
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
Security.loadPolicyFile("http://duartepeixinho.comcrossdomain.xml");
Security.allowDomain("duartepeixinho.com");
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoadComplete);
var loaderContext:LoaderContext = new LoaderContext();
loaderContext.checkPolicyFile = true;
loader.load(new URLRequest("http://duartepeixinho.com/flash/bitmapdata1/logo.png"),loaderContext);
text.antiAliasType = AntiAliasType.ADVANCED;
text.blendMode = BlendMode.LAYER;
text.x = stage.stageWidth/2-text.width/2;
text.y = stage.stageHeight/2;
text.autoSize = TextFieldAutoSize.LEFT;
text.setTextFormat(new TextFormat("Arial", 14, 0x303030, true));
text.textColor = 0xffffff;
text.selectable = false;
text.text="Loading Image...";
addChild(text);
}
private function onLoadComplete(e:Event):void {
imageSource = Bitmap(e.target.loader.content);
imageSourceBitmapData = imageSource.bitmapData;
// -------------------- creating scene -------------------------
removeChild(text);
text.text = "Click on the Screen";
text.x = (stage.stageWidth) - text.width -10;
text.y = stage.stageHeight - 30;
text.alpha = 0;
addChild(text);
//enter frame
addEventListener(Event.ENTER_FRAME, processframe);
stage.addEventListener(MouseEvent.CLICK, mouseClick);
//--------------------- creating the pixels ------------------------
var l:int = 0;
for (var i:int = 0; i < imageSource.width; i++)
for (var k:int = 0; k < imageSource.height; k++) {
var pixelB:BitmapData = new BitmapData(1, 1);
pixelB.copyPixels(imageSourceBitmapData, new Rectangle(i, k, i + 1, k + 1), new Point(0, 0));
var Pixel:pixels = new pixels(this.stage,new Bitmap(pixelB), Math.round(stage.stageWidth/2 - imageSource.width / 2 + i),Math.round(stage.stageHeight / 2 - imageSource.height / 2 + k),Math.random() *6 - 3,Math.random() *-5-10,Math.round(Math.random()*100));
Pixels.push(Pixel);
addChild(Pixels[l].show());
l++;
}
}
private function mouseClick(e:MouseEvent):void {
if (!mouseClicked) mouseClicked = true;
else mouseClicked = false;
}
private function processframe(e:Event):void
{
//enter frame function
//textfield
if (text.alpha < 1) text.alpha += 0.01;
for (var i:int = 0; i < Pixels.length; i++) {
Pixels[i].update();
if (Pixels[i].moving != mouseClicked) {
Pixels[i].moving = mouseClicked;
if (mouseClicked) {
Pixels[i].animation++;
Pixels[i].resetValues();
}
if (Pixels[i].animation == 5) Pixels[i].animation = 1;
}
}
}
}
}
import flash.display.Bitmap;
import flash.display.Stage;
class pixels
{
private var XposInit:Number;
private var YposInit:Number;
private var Xvel:Number;
private var YvelInit:Number;
private var Yvel:Number;
//resize
private var posXstage:Number;
private var posYstage:Number;
private var pixel:Bitmap;
private var grav:Number = 0.98;
private var time:Number;
private var timeInit:Number;
public var moving:Boolean = false;
private var stage:Stage;
//animations
public var animation:uint = 0;
public function pixels(stage:Stage, pixelB:Bitmap, x:Number, y:Number, XvelParam:Number = 0, YvelParam:Number = 0, timeParam:Number = 0):void
{
pixel = pixelB;
XposInit = x;
YposInit = y;
pixel.x = x;
pixel.y = y;
Xvel = XvelParam;
Yvel = YvelParam;
YvelInit = YvelParam;
time = timeParam;
timeInit = timeParam;
this.stage = stage;
posXstage = pixel.x - stage.stageWidth / 2;
posYstage = pixel.y - stage.stageHeight / 2;
}
public function show():Bitmap {
return pixel;
}
public function resetValues():void {
//clear other animations
time = timeInit;
Yvel = YvelInit;
}
public function update():void {
// ----------------------------- resize ---------------- //
if (XposInit - stage.stageWidth/2 != posXstage) {
XposInit = Math.round(stage.stageWidth / 2 + posXstage);
}
if (pixel.y - stage.stageHeight != posYstage) {
YposInit = Math.round(stage.stageHeight / 2 + posYstage);
}
if (moving) {
//------------------------- animations here --------------------- //
switch(animation) {
case 1:
pixel.x = pixel.x + Math.random() * 6 - 3;
pixel.y = pixel.y + Math.random() * 6 - 3;
break;
case 2:
if (time == 0) {
if (Yvel>0) pixel.y += grav +Yvel;
else pixel.y += grav -Yvel;
}
else time--;
break;
case 3:
case 4:
pixel.x += Xvel;
pixel.y += Yvel;
Yvel += grav;
break;
}
// -------------- physics here ----------------- //
if ((animation == 3 || animation == 4) && pixel.y > stage.stageHeight) {
Yvel = Yvel * -0.7;
pixel.y = -Math.random() * Yvel +stage.stageHeight;
if (animation == 4) {
pixel.x = stage.stageWidth/2;
}
}
}
else {
pixel.x += (XposInit - pixel.x) / 4;
pixel.y += (YposInit - pixel.y) / 4;
}
}
}