Modified code from Lee Brimelow posted here : https://plus.google.com/110495278155587072613/posts/U8oXcET3TE9
Performance example of replacing .bitmapData to draw a animation.
/**
* Copyright leichtgewicht ( http://wonderfl.net/user/leichtgewicht )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/2ZGV
*/
/**
* Modified code from Lee Brimelow posted here : https://plus.google.com/110495278155587072613/posts/U8oXcET3TE9
*
* Performance example of replacing .bitmapData to draw a animation.
*/
package {
import flash.display.StageQuality;
import flash.utils.describeType;
import flash.display.LoaderInfo;
import flash.display.Bitmap;
import flash.system.LoaderContext;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.system.Security;
import flash.display.Loader;
import flash.net.URLRequest;
import flash.display.Sprite;
import flash.geom.Rectangle;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.display.BitmapData;
import net.hires.debug.Stats;
[SWF(frameRate=60)]
public class BitmapDataReplaceAnimationExample extends Sprite
{
// Holds all current blit sprites
private var animations:Vector.<BitmapDataReplaceAnimation> = new Vector.<BitmapDataReplaceAnimation>();
private var numAnimations:int = 0;
public function BitmapDataReplaceAnimationExample()
{
Security.loadPolicyFile("http://assets.wonderfl.net/crossdomain.xml");
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
stage.quality = StageQuality.MEDIUM;
// WonderFl Specific loading
var imageLoader: Loader = new Loader();
imageLoader.contentLoaderInfo.addEventListener( Event.COMPLETE, init );
imageLoader.load( new URLRequest( "http://assets.wonderfl.net/images/related_images/a/aa/aa1e/aa1e38cac5ca15481f555e095be7e4f0c86ac3fa" ), new LoaderContext(true) );
}
private function init(e:Event):void
{
// Initializes the sprite sheet frames
SnakeData.init(Bitmap( LoaderInfo(e.target).content ).bitmapData);
// You gotta track that shit
addChild(new Stats());
// Start with 50, good to compare
addAnimations(50);
// When you click the stage you get 10 more
stage.addEventListener(MouseEvent.CLICK, onClick);
addEventListener(Event.ENTER_FRAME, loop);
}
protected function onClick(event:MouseEvent):void
{
// Create another 10 more
addAnimations(10);
}
protected function addAnimations(amount:int):void
{
for(var i:int=0; i<amount; ++i)
{
var s:BitmapDataReplaceAnimation = new BitmapDataReplaceAnimation(SnakeData.bitmaps, SnakeData.maxSize);;
s.x = Math.random() * stage.stageWidth;
s.y = Math.random() * stage.stageHeight;
addChildAt(s,0);
animations.push(s);
}
numAnimations = animations.length;
}
protected function loop(event:Event):void
{
// Loop through snakes and render them
for(var i:int=0; i<numAnimations; ++i)
{
var ani:BitmapDataReplaceAnimation = animations[i];
ani.rotation += 2.0;
ani.render();
}
}
}
}
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.geom.Rectangle;
import flash.geom.Point;
/* This class is generated from the JSON that was exported from Texture
Packer. It contains the rects for all the frames that are in the sprite
sheet. They are stored in a static vector. */
class SnakeData {
private static const rects:Vector.<Rectangle> = new Vector.<Rectangle>(20);
{
rects[0] = new Rectangle(0,0,106,62);
rects[1] = new Rectangle(106,0,104,62);
rects[2] = new Rectangle(210,0,104,64);
rects[3] = new Rectangle(314,0,102,64);
rects[4] = new Rectangle(0,64,100,64);
rects[5] = new Rectangle(100,64,100,64);
rects[6] = new Rectangle(200,64,100,64);
rects[7] = new Rectangle(300,64,100,64);
rects[8] = new Rectangle(400,64,98,66);
rects[9] = new Rectangle(0,130,100,64);
rects[10] = new Rectangle(100,130,100,66);
rects[11] = new Rectangle(200,130,100,66);
rects[12] = new Rectangle(300,130,100,66);
rects[13] = new Rectangle(400,130,100,66);
rects[14] = new Rectangle(0,196,102,64);
rects[15] = new Rectangle(102,196,102,64);
rects[16] = new Rectangle(204,196,104,64);
rects[17] = new Rectangle(308,196,106,64);
rects[18] = new Rectangle(0,260,106,62);
rects[19] = new Rectangle(106,260,106,64);
}
public static const maxSize:Rectangle = new Rectangle();
public static const bitmaps:Vector.<BitmapData> = new Vector.<BitmapData>(20);
public static function init(sheet:BitmapData):void
{
// Create a proper blipping size;
var nullPoint: Point = new Point();
for( var i: int = 0; i<rects.length; ++i){
var rect: Rectangle = rects[i];
bitmaps[i] = new BitmapData(rect.width, rect.height);
bitmaps[i].copyPixels(sheet,rect, nullPoint);
if( rect.width > maxSize.width ) {
maxSize.width = rect.width;
}
if( rect.height > maxSize.height ) {
maxSize.height = rect.height;
}
}
}
}
class BitmapDataReplaceAnimation extends Sprite
{
// Main Bitmap
private var bm:Bitmap;
// The BitmapData of the sprte sheet
public var sheet:Vector.<BitmapData>;
// Keeps track on current frame
private var frame:uint = 0;
private var frames:uint;
public function BitmapDataReplaceAnimation(sheet:Vector.<BitmapData>, size:Rectangle)
{
this.sheet = sheet;
frame = Math.random()*frames;
frames = sheet.length;
mouseChildren = false;
mouseEnabled = false;
// Setup main bitmap
bm = new Bitmap();
bm.x -= size.width * 0.5;
bm.y -= size.height * 0.5;
addChild(bm);
}
public function render():void
{
// Determine what frame to show next
( frame == frames-1) ? frame = 0 : ++frame;
bm.bitmapData = sheet[frame];
bm.smoothing = true;
}
}