flash - Loading image twice via Actionscript3? -

-

i'm trying use infinite scroll as3 discuss in this question. i'm developing using flashcs5 ide.

the absolutely last thing need load large background image ("header_bg_vert.jpg") externally after rest of movie has loaded, instead of requiring entirety of animation load beforehand (or preloading header animation in).

my as3 below. "infinite loop" works placing 2 copies of same seamless image end-to-end, moving second image front after scrolls off screen -- currently, code displays 1 copy of image. what's wrong it? also, best way of accomplishing this?

many thanks.

stop();  //load bg image var request:urlrequest = new urlrequest("header_bg_vert.jpg"); var s1:loader = new loader(); var s2:loader = new loader();  s1.contentloaderinfo.addeventlistener(progressevent.progress, loadprogress); s1.contentloaderinfo.addeventlistener(event.complete, loadcomplete);  s2.contentloaderinfo.addeventlistener(progressevent.progress, loadprogress); s2.contentloaderinfo.addeventlistener(event.complete, loadcomplete);   function loadprogress(event:progressevent):void { var percentloaded:number = event.bytesloaded/event.bytestotal; percentloaded = math.round(percentloaded * 100); trace("loading: "+percentloaded+"%"); } function loadcomplete(event:event):void { trace("complete"); }  s1.load(request); s2.load(request);  //the speed of scroll movement. var scrollspeed:uint = 1;  //originally, added 2 instances of movie clip onto stage. //var s1:scrollbg = new scrollbg(); //var s2:scrollbg = new scrollbg();  addchild(s1);  addchild(s2); setchildindex(s1, 0); setchildindex(s2, 0); //this positions second movieclip next first one. s1.y = 0; s2.y = s1.height;  //adds event listener stage. stage.addeventlistener(event.enter_frame, movescroll);   //this function moves both images left. if first , second  //images goes pass left stage boundary gets moved  //the other side of stage.  function movescroll(e:event):void{ s1.y -= scrollspeed;   s2.y -= scrollspeed;    if(s1.y <= -s1.height){ s1.y = s1.height - scrollspeed; }else if(s2.y <= -s2.height){ s2.y = s2.height - scrollspeed; } }

apparently displays both copies on top of each other. happens because flash player not know how tall s1 before loaded. should position images within loadcomplete()


Comments

Post a Comment

Popular posts from this blog

javascript - Enclosure Memory Copies -

-
function myclass() { //lots , lots of vars , code here. this.bar = function() { //do numerous enclosed myclass vars } this.foo = function() { alert('hello'); //don't enclosed variables. } } each instance of myclass gets own copy of bar , foo, why prototyped methods use less memory. however, know more memory use of inner methods. it seems obvious me (1) below must true. agree? not distinct myclass instances have own distinct copies of bar, must have own distinct copies of myclass enclosure. (or else how bar method keep myclass variables straight on per instance basis?) now (2) question i'm after. since inner foo method doesn't use in myclass enclosure natural qustion is: javascript smart enough not keep myclass enclosure in memory use of foo? this depend entirely on implementation not language. naive implementations keep far more around others. answer true e.g. v8 (chrome's js engine) may not true spider...
Read more

php - Replacing tags in braces, even nested tags, with regex -

-
example preg_replace('/\{[a-za-z.,\(\)0-9]+\}/', 'replaced', 'lorem ipsum dolor sit {tag1({tag2()})}, consectetur adipiscing elit.'); the result: lorem ipsum dolor sit {tag1(replaced)}, consectetur adipiscing elit. question as can see "tag2" has been replaced, want replace "tag1" know how can this? (in cases might this: {tag1({tag2({tag3()})})}) , on.) btw using preg_replace_callback, easier show preg_replace here site can test code: http://www.spaweditor.com/scripts/regex/index.php you need add curly braces character set. here's pattern used: /\{[a-za-z.,\(\)\{\}0-9]+\}/ and here result: "lorem ipsum dolor sit replaced, consectetur adipiscing elit."
Read more