I have a function that states when movieclip1 is dragged and hits a line then it stops the drag, however it seems to stop the entire drag function in the swf on the other movieclips even though they arent called in the function. Can somebody please help me with this.
Regards
T
Here is the code:
function hitTest(event:Event):void
{
if (movieclip1.hitTestObject(line))
{
movieclip1.stopDrag();
}
else
{
}
}
Are you absolutely positive you only have one instance of movieclip1 on your stage? Definitely double check. Are you creating them dynamically, or are they preloaded when your SWF loads?
If they're preloaded:
Perhaps during testing you made some quick copies of it, and now those copies have the same name and they're all responding the same. That's my first guess.
If they're loaded dynamically:
Check the function where they're being created. If you're naming them in a loop (with a number on the end like the above), be sure that you're properly increasing the numeric value used on the end.
Related
I am facing a problem, where there is a function executed the next line right after a gotoAndStop(130) action, the function depends in its work on the objects inside this frame. but the problem is that the function seems not seeing any children.. why? why? why? why?
myMc.gotoAndStop(130);
create_waypoints(par1,par2,par3);
the function creat_waypoints depends on the drawn obstacles that exists in frame 130 inside the myMc.
it seems (but I don't know for sure) by the time that creat_waypoints executes its actions, frame 130 was just entered but not yet loaded...
What can I do? Thanks in advance..
after many experiments, I have come to a working solution but it is twisted, it had to skip an entire loop of actions and I am not happy with it, but for now it is all what I have..
myMc.gotoAndStop(2);
myMc.addEventListener(Event.ENTER_FRAME,mc_ef,false,0,true);
function mc_ef(e:Event):void {
if (e.target.loaded==null) {
e.target.loaded=true;
} else {
e.target.loaded=null;
creat_waypoints(par1,par2,par3);
e.target.removeEventListener(e.type,arguments.callee);
}
}
A simpler work-around would be including the "obstacles" and their dependencies in earlier frame where the depending logic is written. They can be included as "out-of-stage" invisible members.
I'm having an issue with a "Point" type variable velocity changing without any calls to change it.
private function framecode(e:Event) {
trace(getVelocity().y);
tracks.gotoAndStop(2);
trace(getVelocity().y);
}
This code is part of a class called "tank" which extends the one that velocity is used in (my moving object class). velocity is a private point type variable and getVelocity() is a public access method. tracks is a named movieClip contained inside the one linked with tank. The event listener is ENTER_FRAME. There is no coding on the frames of tracks.
Somehow these two traces give different values (the first one being correct) and I can't figure out how the gotoAndStop() can possibly effect it (and hence how to fix it).
I've found that play() does not reproduce the bug but prevFrame() and nextFrame() do. As the variable is private this class should not even have access to it to change it.
Another strangeness is that if the event listener is changed to FRAME_CONSTRUCTED or EXIT_FRAME, there is massive lag and my movieClip randomly disappears after a few seconds.
Thank you for reading, any help would be appreciated.
Your velocity variable is private, so one one can access that outside of the class.
However, getVelocity() is returning a reference to your velocity variable. Once someone has that reference, they can change the values of it's properties: getVelocity().y = 3. So it's not impossible for this to happen.
One way to trouble shoot this is to add a trace() statement to/set a breakpoint in getVelocity() so you can see where it's being used.
You could do something similar w/the Point class, but you'll have to extend it, add getter/setter methods for y (that traces out when they are called), and modify your code to use the getter/setter. This might be worthwhile (its simple enough), and the act of modifying your code to use the getter might help you discover where the problem is.
I've been debugging the following issue for quite awhile now and have hit a wall.
I've set up a project in Flash (CS4, btw) that has a set of keyframes that I move between to represent the various screens of a game. One of them has a MovieClip defined (with children inside it) representing an option menu, that appears on a couple of different keyframes.
The problem I'm having is that this MovieClip reference seems to be accessible when I first enter the keyframe (using "gotoAndStop"), and occassionally when I move to other frames and back. But in at least one case, when I exit the frame and come back, I get a null reference error (TypeError: Error #1009: Cannot access a property or method of a null object reference). when I try and access it (getChildByName("optionMenuTitle")). I've even tried having the system iterate from 0 to numChildren and print out the name of each object, but it returns NULL at position 7 despite returning numChildren as 9. Does anyone have any idea why this particular MovieClip reference is NULL only in this case??
Here is a basic (abbreviated) rundown of the process occurring:
//set up function to be fired on frame construction
addEventListener(Event.FRAME_CONSTRUCTED, fadeIn, false, 0, true);
public function fadeIn(event:Event):void {
_handler.handle(); //this function is called which runs the debug statement below
trace (mainDoc.numChildren); //displays 9
for (var i = 0; i < mainDoc.numChildren; i++) { trace(mainDoc.getChildAt(i).name); } //throws null when it gets to 7
optionMenuTitle = OptionMenu(mainDoc.getChildByName("optionMenuTitle")); //the original failed call that caused me to debug
}
edit: One other potentially useful bit of information. If I comment out the getChild commands above that error, the frame loads and I can see the MovieClip visually displayed on the stage (although it's not interactive and is constantly cycling through the frames of its child objects). Still can't access it programatically though.
another edit: The object in question is a subclass of MovieClip that I named "OptionMenu". I put a breakpoint in the OptionMenu constructor, and when the frame loads correctly, that breakpoint is hit. When I get the error above, the breakpoint in the constructor is never hit. The debugger doesn't seem to give me access to see what's going on inside Flash's mind when it's instantiating the frame, however, so I can't see the logic as to why the constructor is never called.
Well this one has been driving me crazy. I could not workout why it does not reference your optionMenuTitle when you go back to the frame called title a second time.
The only way I could work around it was to take the 3 buttons out of the OptionMenu MovieClip and put them on the stage with the grey background underneath, essentially doing away with OptionsMenu.
So I moved all initialization code from OptionMenu to your TitleHanlder and also added the destroy calls to your destroy method in TitleHandler for each of the 3 buttons.
I also changed the refs from root to mainDoc:
sound.initialize(LogicGameMain(mainDoc).soundOn);
music.initialize(LogicGameMain(mainDoc).musicOn);
This worked for me as you can still interact with the buttons the second time around. It definately seems like there is some bug with these buttons being nested.
I hope this is useful for you.
I am making a fighting game in Flash and while I have everything running, I am missing something: a victory/loss screen. Logically, I know how to do it:
if character.hp < 0
{
character.dead = true;
dispatchevent("death", event)
}
My problem is that I have no idea as to how to code it. I know I will use two classes and my two .fla files (unless I am wrong).
I have two .fla files that are in play here: the Menu.fla file and the Arena.fla file. Menu.fla contains the entire navigation of the game, options, character selection screens, etc. and when it is time for the player to engage in battle, it loads the Arena.fla file, which contains only the backgrounds (depending on the selected stage) and for now is set to a length of one frame only. For Arena.fla, the real action happens in my classes, but logically, I would only need HP.as and Character.as.
In Character.as, I have declared the following variable:
var isDead:Boolean = false; //is character dead?
In HP.as, believe I should have the following:
if(currentHp<0)
{
currentHp = 0;
character.isDead = true; //declared as var `character:Object;`
EventDispatcher.dispatchEventListener("playerDead", playerDead);
}
And finally, in Arena.fla, I want to be able to detect the above-mentioned eventlistener and simply move on to a second frame which will display a message in the style of "PLAYER ONE HAS WON" or "PLAYER ONE HAS LOST" with a button that will allow me to go back to the character selection screen. This is the first part in which I am stuck: how do I detect the dispatched event listener in my main .fla file?
Secondly, if the player clicks on the "CONTINUE" button, which displays regardless if the player has won or lost, how can my Menu.fla (which loads the Arena.swf) detect this click event, unload the game, and go back to the character selection screen?
Thank you in advance for helping me out. I realize this is a lot of text but it's the most descriptive I can be. If you have any questions or need any clarification concerning my question, feel free to speak up.
-Christopher
I'm not sure about the code you have to read the HP but do you know that character.dead is actually becoming true?
You could always have the Arena.swf call a function in the HP.as that will end the game and declare a winner.You could add a second Frame to Arena.swf that contains a dimmed background and a WINNER or LOSER text.'
In general, the easiest way for a user-defined class to gain event dispatching capabilities is to extend EventDispatcher. If this is impossible (that is, if the class is already extending another class), you can instead implement the IEventDispatcher interface, create an EventDispatcher member, and write simple hooks to route calls into the aggregated EventDispatcher.
activate
Dispatched when Flash Player or an AIR application gains operating system focus and becomes active.
deactivate
Dispatched when Flash Player or an AIR application loses operating system focus and is becoming inactive.
Event dispatcher
Thank you all for your help, but I have figured it out. Turns out my method was far too complicated for what I wanted to do, and for the time I had left. I will explain how I did it.
Instead of using an EventDispatcher like I thought I would, I used a SharedObject, which simply made everything work like magic.
A SharedObject can be accessed from anywhere in the application/game, as long as it is referred to it correctly. So I simply created a SharedObject called "winLossData" set to "NO WINNERS" in my character selection screen. This cookie is never saved nor written to the disk, so there's no chance for the user to find it (generally speaking).
I have decided to use the Movement.as class which contains all of my controls and wrote an event listener of type Event.ENTER_FRAME that checks constantly my characters' health status. If one of them is below 100, my SharedObject immediately takes for value either "PLAYER ONE" or "PLAYER TWO", depending on who won (i.e. whose health points are not under 100). Afterward, just for precaution, I reset the losing character's health points to 100. Here's the code:
function whoWon(event:Event):void
{
if(playerSpriteBar.getPower() <= 0)
{
winner.data.winner = "Player Two";
playerSpriteBar.update(100);
}
if(playerAIBar.getPower() <= 0)
{
winner.data.winner = "Player One";
playerAIBar.update(100);
}
}
In my Menu.fla, I have another event listener of type Event.ENTER_FRAME that waits for the cookie to change value. As soon as the cookie changes values, Menu.fla automatically unloads the external swf (in our case, Arena.swf) and displays the results, accordingly to the received SharedObject. The rest of the actions happen inside the Menu.fla file, so no need for any extra coding.
Once again, thank you all for your help.
I am using the frames in the timeline of a .swf as pages in a flash app. The user can advance to the next page by clicking a button that takes her to the next frame. Similarly, it is possible to navigate to the previous frame/page as well.
Most of the content is placed on the stage (i.e. created by dragging an instance of a library symbol to the stage) but properties of those instances, such as .visible might be changed via actionscript. Also, some objects are loaded from external flash files and displayed programmatically with addChild / addChildAt.
The problem is, if I am on Frame N+1 and there is an object displayed on the stage programmatically (i.e. with addChild, not by having it placed on the stage) and navigate to Frame N where there is an object that is placed on the stage (i.e. dragged from the library),
then the instance of that object is undefined/null and throws an error if I try to set its properties (like .visible).
The error does not occur if I am moving to the NEXT frame, only if I am moving to the PREVIOUS one. Therefore I assume that some kind of initialization is not getting called while going one frame back.
I was also thinking that the objects would just not "live" to the next timeframe, that is, their value would be lost and re-initialized because of scope, but if there is no dynamically created object on the stage, I can navigate back and forth just fine.
Is there a way to ensure that the objects created on the stage do not disappear while navigating back to the previous frame?
The first, and more useful, part of the answer is this: timeline keyframes and scripts can give conflicting information about display objects - whether they should exist, where they should be, and so on. For example, when you add an item by playing into its frame, and then delete it with script, and then play into its frame again. When this happens, there's no unambiguously correct thing for Flash to do, so it tends to be unpredictable. I believe what generally happens is that once you fiddle with a given object via script, it's considered to no longer pay attention to the timeline - but your mileage will vary.
Having said that, the reason things are different when you play backwards is the second and more arcane part of the answer. Internally Flash functions differently when seeking forward and backwards on the timeline. Flash internally treats keyframes as changes to be applied in the forward direction, so as you play forward, it applies those changes in sequence. When you move backwards, however, from frame N+X to frame N, it doesn't scan through the intervening X frames reversing those changes - it jumps back to frame 1 and fast-forwards along to frame N. Normally, it amounts to the same thing and you don't need to worry about it, but when you get into the twitchy area where scripts and the timeline have a different idea of what should be on the stage, you're liable to see things behave differently depending on which way you jump (as you are now).
The super-short version is, for things to work predictably, try to ensure that any given object gets added, updated, and removed the same way - either all via script, or all via the timeline. When that seems impossible, fiddle with your content structure - usually, the best solution is to change your object into two nested ones, so that the things you want to do with script occur one level higher or lower than the things you want to do with the timeline.
I'm not sure I got your question right, but as3 does not instantiate elements on the timeline as soon as you gotoAndSomething, but later that frame.
That is, you can't
this.gotoAndPlay(10)
this.elementOnTimelineFrame10.DoSomething()
without errors.
I remember using this chunk of code in the past to work around this problem. It uses the Stage.Invalidate() function to wait for an Event.RENDER before trying to access and children, more info (although vague as hell) is here
private function init():void
{
stage.addEventListener(Event.RENDER, stage_renderHandler);
}
private function stage_renderHandler(evt:Event):void
{
// Run your code here
updateChildren();
}
private function enterFrameHandler(evt:Event):void
{
// triggers the RENDER event
stage.invalidate();
}
This also might me very costly (performance wise). I would strongly advise against dynamically adding/removing objects to an existing timeline, is there any way in which you can place an empty Sprite above the timeline animation and use that for all your dynamic content?
Hope this helps