ActionScript 3.0 :: Animation: Timer Versus ENTER_FRAME Event?
Jul 10, 2011
I use 2 options when i comes to animationg objects with Action Script
1. Timer based animation
PHP Code:
initTimer = new Timer(1000/fps);
initTimer.addEventListener(TimerEvent.TIMER, moveItem);
[code]....
2. ENTER_FRAME event based animation
PHP Code:
var time:int = getTimer();
addEventListener(Event.ENTER_FRAME, moveItem);
function moveItem(event:Event){
[code]....
Both of this options work ideal for my needs and they produce smooth animation. My question is witch one is better and why? And is there more ways to animate objects with action script?
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Similar Posts:
Oct 29, 2009
Lets say we have a movieclip "Enemy" in the Flash library and a class "Enemy.as" is associated with it which listens to ENTER_FRAME event as follows,
public function Enemy():void
{
//constructor of this "Enemy.as" class
[code]....
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May 8, 2009
I'm trying to automatically set up a rotating animation via the Timer Event. There's a Movie Clip called main_mc that's X position is changed with a Tween. Can the Timer Event run multiple events or is it only 1 per Timer?
Code:
var auotT:Timer = new Timer(5000);
autoT.addEventListener(TimerEvent.TIMER, onAuto);
autoT.start();
[code]...
Or do I have to create a timer event for each part?
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Mar 7, 2010
I was wondering, why does weak references does not work fro Enter_Frame and Timer? I mean, when I add any event listener on an object for those events I must remove them later, that is annoying! I use this:
timer.addEventListener(TimerEvent.TIMER, myevent, false, 0, true);or sprite.addEventListener(Event.ENTER_FRAME, myevent, false, 0, true);
When I lose reference to objects with these events (removeChild or null it) the event continues to happen and the 'myevent' func continues to be called :/Am I doing something wrong? What would be a good solution for this?
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Jun 23, 2010
I have been trying to add a child (ball) randomly on stage with a timer every certain time or with ENTER_FRAME, but I can't get it to work. In both cases it just add the first one and then stops, even though the timer keeps on working!
[Code]...
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Jun 23, 2010
I have been trying to add a child (ball) randomly on stage with a timer every certain time or with ENTER_FRAME, but I can't get it to work. In both cases it just add the first one and then stops, even though the timer keeps on working!
Here is the code:
//Classes
import com.greensock.*;
[code]......
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Jan 15, 2010
I am trying to save memory and space. So instead of using the Timer for my application, I was thinking about using my main loop (ENTER_FRAME) to keep track of time that passes. Is there anything wrong about this ??
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Jul 20, 2009
it has a countdown timer. When this timer gets to 0, I want the game to go and play the next level. This is the code.
ActionScript Code:
stage.addEventListener(Event.ENTER_FRAME, countDown);
function countDown(e:Event){
[code].....
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Feb 9, 2009
There are a few fairly intensive procedures the class goes through, which require me to stagger out the action taking place. That is to say, if I were to use recursion, there are times when I'd easily hit a stack overflow, so to compensate I'm avoiding recursion through recording information in class level variables and running through the routine again (and again and again) on an ENTER_FRAME event.
This all works great, and I'm happy with the result. The only annoying bit is that performance is better when the frame rate's higher (and slower when it's lower). Run the class at 30fps, and the time it takes to complete is significantly slower than at 120fps. No surprise there, but still annoying since I'm not interested in making the user make changes in their framerate to accomodate the class.
So I considered switching to a timer-based method, but then I remembered something about the Timer class accomodating the framerate of the SWF. Looking it up confirmed what I remembered:
...if a SWF file is set to play at 10 frames per second [fps], which is 100 millisecond intervals, but your timer is set to fire an event at 80 milliseconds, Flash Player will fire the event close to the 100 millisecond interval.
Now I'm wondering if it's even worth the effort, since it would appear that the end result would be much the same as it is now using enter frame.
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Nov 23, 2009
I was having a go at a tutorial which worked fine but then I started seeing how it would work in an external file. Object Oriented Flash. On line 27 it picks up the following error... 1046: Type was not found or was not a compile-time constant: Event. //function enterFrames(e:Event) I've tried this for myself but what are the function parameters I need to mimic the same motion of the bouncing ball?
[Code]...
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Mar 15, 2009
I'm animating various squares that needs to move "smoothly" on the screen.I've tried with the basic Tween and with TweenLite at 30 and 60 fps and the animation still choppy while at 90 fps looks better.
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Aug 31, 2011
Lets say we have a movieclip "Enemy" in the Flash library and a class "Enemy.as" is associated with it which listens to ENTER_FRAME event as follows,
public function Enemy():void
{
//constructor of this "Enemy.as" class
addEventListener(Event.ENTER_FRAME, move);
}
private function move(evt:Event):voidnot use this approach at all?
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Apr 26, 2010
I have a little problem while trying to get a URL on a Enter_Frame event using Flash AS3.I would like to trigger the URL request on the last frame of the movieclip.Everything works fine except that instead of getting the URL once, it keeps loading it all the time.
Result: I get hundreds of web pages opening in my browser.
Here is the code I use:
stop();
addEventListener(Event.ENTER_FRAME,my_function);
function my_function(e:Event):void{
var homeLink:URLRequest= new URLRequest("http://www.myurl.com");
navigateToURL(homeLink, "_self");
}
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May 3, 2011
I have multimoduled application and I need to monitor when the mouse is moving or not moving on a protion of my swf file.The app is consisted of video player , text part and video list on the right.So I want monitor when the mouse is moving just over the video player not the whole swf application.I have this function
Code:
vidPlayer_mc.addEventListener(Event.ENTER_FRAME, checkMouse);
function checkMouse(e:Event):void {
if (sw==0) {
[code]....
I use vidPlayer_mc.mouseX/Y; property but i doenst seem to work.I need the functionality when mouse moves over video player the playbar on the bottom shows up and vice versa.
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Apr 15, 2009
I am facing a problem where I have a listener listening to Event.ENTER_FRAME:
Code:
public function showAnimation():void {
var character:MovieClip = new Character();
[code]....
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Feb 16, 2012
I am working on a very simple game in Flash. I want to make all the animations framerate agnostic, so that I can change the framerate without affecting the flow and speed of the game.I read somewhere that if you want to do that, you simply create a Timer object and attach an event listener to this timer.
What if I have many objects that have to listen to the same timer? See the code to understand what I am trying to do. At this stage nothing breaks, but the event does not fire.Here is the Main class, the one that runs on swf execution:
public class Main extends MovieClip {
private static var _stage:Stage;
private static var _timer:Timer;
[code]....
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Aug 20, 2010
I want to create an endless loop, 8 items moving in a circular shape. When you roll over of each item, it will stop the moving, and you should be able to click it.
I dont know what should I use, should I use Event.ENTER_FRAME or the circular shape should be in movie clip, so that when there is a mouse over event, it will stop moving?
Oh ya, I code everything in AS3, including the movement, objects etc. Something like a new class
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Apr 2, 2011
I wanna apply a glow filter to a button. What I want to happen is that if for a media player the currentFrame = totalFrame i.e, if the seekBar reaches last frame, I want the next_btn to animate,...like Glow In and Glow Out.
I dont want a mouse_over / mouse_out event to handle the animation.
Possibly I think that I'll have to use a Enter_Frame event, but I cant think of a function to do so.
my glow filter is like this...
var myGlow:GlowFilter = new GlowFilter(0xFE4110, 4, 2, 2, 4,2, false, false);
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Jun 12, 2009
Variable called "switch" has a boolean value of "false".Event.ENTER_FRAME event listener method fires, and calls method "onEnter()".Within the "onEnter()" method, the "switch" variable is set to boolean "true".My question: What is the best way to make sure "switch" variable is called, and set, only once during the ENTER_FRAME event?
Is it as simple as checking if "switch" is false, and then setting it to true... Does it matter that I would be doing the if() for every frame of the Event.ENTER_FRAME?
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Sep 27, 2011
I have an ENTER_FRAME event on one of my pages to create a progress bar for an audio track. It is working great, but I when I click on a button to goto the next frame, it continues to run the ENTER_FRAME event continuously. I have many audio tracks in this project and need a progress bar for each. however, once a second one starts, it really begins to bog down the player. Is there a way to stop an ENTER_FRAME event from continuing after you leave a page? Here is the code i have:
Code:
import flash.events.Event;
tb_mc.scaleX = 0;
[code].....
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May 7, 2010
I'm working on a custom tween class. Everything work good, instead of sound volume.I'm using the following code:
Code:
package {
import flash.events.Event;
import flash.media.SoundTransform;[code]....
It seems that if I use the ENTER_FRAME event for transformation nothing happens.
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Sep 9, 2009
I'm struggling to move from AS2 to AS3 and trying to mimic an old AS2 trick. When the playhead hits a frame on my mc's timeline with this code:
_root.gotoAndPlay("3");
the main/root/parent timeline would go to frame 3. Clean, short, simple. How can I do this in AS3?I've tried this code but it didn't work:
this.addEventListener(Event.ENTER_FRAME, proceedNow);
function proceedNow(event:Event){
//parent.nextFrame();
parent.gotoAndPlay("3");
}
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May 7, 2011
I'm attempting to use the ENTER_FRAME event listener in order to change the text value of a field every 60 frames..I have the strings I want rotated out in an array that is being referenced in the if/else statement The movie doesn't even error out, it just doesn't work.
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Jul 6, 2011
I have a script that relies on ENTER_FRAME event to run every time. I have noticed on some slower computers there can be some lag when a flash movie is playing. Does ENTER_FRAME run on every frame, even if its on a slow computer? If the flash movie lags, does the ENTER_FRAME event still run and the rendering just try to catch up? Is running code on ENTER_FRAME a reliable way to execute code every time a frame is entered?
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Aug 23, 2010
I've got a button that, when clicked runs a method. The method waits for a condition to be met (or rather, waits for a variable to be set in the model) and then updates the view. I did this by setting an ENTER_FRAME listener and it works fine:
ActionScript Code:
private function loadHouseRoom(e:MouseEvent):void
{
view.addEventListener(Event.ENTER_FRAME,loadStuff);
[Code]....
I also tried setting the addEventListener to use a weak reference, but the Event never gets fired in the first place.
Note: I have to use a method like this. I removed a bunch of code irrelevant to this question to make this more readable, but the user needs to be able to change his mind and click another button before the loadStuff function is called.
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May 14, 2009
No matter where the EnterFrame event is registered, the frame would not be rendered after the EnterFrame event handler done in each frame.For example, I have two unrelated MovieClips:
Code:
oneMC.addEventListener(Event.ENTER_FRAME, tick);
function tick(event:Event):void {
if (otherMC.currentFrame == 20) {
otherMC.gotoAndPlay(5);
}
}
The frame #20 of "otherMC" will never be rendered on the stage, right?
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Feb 6, 2012
I am a newbie in ActionScript 3.0. I want to make flash application that will zoom in object when on mouse over and write same text on the screen and zoom out object a clear text when the mouse is roll out.I have a probelm, when I roll over the object it zoom in the text appers and when I roll out the object returns to the default position. But when I roll over then I rool out and roll over again (not wait until zooming out is completed) the addEventListener does not stop and text is mixed (part pf the text is from first zooming in a nd part of the text ist from second zooming in)
This is my code:
//import the tweenlite packages.
import com.greensock.TweenLite;
[code]......
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Mar 25, 2010
This code works fine if the timeline is moving forward through the .flv file. However, the going in reverse produces choppy results. The choppyness seems uniform, as in, it's always choppy and always the same intensity. [code]...
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Aug 4, 2009
I'm playing with the event system and my own custom event class for a project I'm working on. I'm wondering if it's better to use obj.dispatchEvent(new CustomEvent(event)) or if I should just use a regular function call.
It seems to me that in most cases when one object is detecting the event and another is responding to it it is better to use the event system so I'm not passing around objects too much.
I was also wondering what the performance hit of using the event vs. the function call is. I'm sure the event is more cpu intensive but is it negligible?
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Aug 1, 2011
I am creating game which involves some billiard-like balls to bounce on the screen. I created a MovieClip with only one frame which represented the ball, exported it to the class, extended it to my needs and animated it using Event.ENTER_FRAME. It works fine, but there is something that confuses me -- both, the stage and the ball have only one frame each, so I don't quite understand how Event.ENTER_FRAME works... I mean, if there are no keyframes, how is done the animation? If I used already animated MovieClip, I would have to add keyframes, right?
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