Having trouble setting up multiple cameras in Flixel v2.55.
This s a 2d tile game. I'd like for the map and actors to be at zoom 2 and the hud and menus at zoom 1. Every game element is set into a FlxGroupXY (modified FlxGroup). I've googled this thing for 3 days now, tried every example and tutorial I could find to no avail. I've tried different things on my own, like giving each actor its own camera in its own class, etc. Just playing with it until I'm completely fed up. Sometimes I end up with this error: Error #2025: The supplied DisplayObject must be a child of the caller.
If anyone could recommend some code to try I would really appreciate it.
Problem was that I was setting the the cameras in the gamestate constructor. Had to override the create function and set the cameras there.
Related
Thanks partly to info from people here, I'm getting more comfortable with Actionscript 3, but I've got a problem that is very puzzling.
The program (done entirely in AS3, no Flash) has several different screens. One does music and it's working very well. Another does video. Obviously when somebody goes from music to video we need to make sure the music is turned off. There is a Main screen that handles going from one to the other.
I started out doing it this way, and the reason I got "Call to a possibly undefined method" is obvious. The following is in the Main class, with the "private var" part inside the class but external to the functions and the "music = new MusicPanel" part in one of the functions:
private var music:MusicPanel;
music = new MusicPanel(trackNames.songNames, trackNames.numSongs);
When switching to the video panel, I added a public function in MusicPanel called StopMusic and called it when the user went to the video panel:
if(music != null)
music.StopMusic();
That got the error:
Call to a possibly undefined method StopMusic
I was checking to make sure music was not null, but that error didn't seem like a bad thing. So I changed the code to:
private var music:MusicPanel = new MusicPanel();
and added a function that would get the song names and number of songs to the music class. That did not help- I got the same error, and in fact the function that tried to put the song names and number of songs got the error also.
At the same time, the Video panel does not give me that error, even though I have laid it out in exactly the same way.
private var video:VideoPanel = new VideoPanel;
video.PlayVideo();
I do a fair amount of setup on the music screen when it gets called as a new class, I do less setup for the video screen. I'm not sure if that makes a difference.
Clearly there is something I don't understand here. Anybody got any idea what's going on? I've looked at a number of questions about this, but have not found an answer. I think I'm doing this right, but the compiler thinks I'm doing it wrong, so I must be doing it wrong.
Later Note: One answer mentioned the difference between Sprite and MovieClip. I gave that a try, changing to MovieClip does not help, and the VideoPanel, which works, extends Sprite.
What is the base class of MusicPanel, Sprite or MovieClip? If Sprite, change to MovieClip and see what that does. In AS3 Sprites are not dynamic, so can't take properties that are not inherent in the class.
It appears that the problem is coming either from Actionscript 3 or from FlashDevelop. I built a new module (SongsPanel) which is very close to the same as the original MusicPanel. It works. If I add a public function in MusicPanel the compiler comes back with the same error. If I add a public function in SongsPanel everything works.
Does FlashDevelop keep track of errors in some hidden file? I'm guessing that's what's going on, and that there is a bug in the way that is done.
PITA!- but at least it now works.
I am using Flash CC.
I have drawn 7 rectangles using the Rectangle Tool.
I then converted the 7 as one movie clip (By hitting F8).
The Problem:
I want to be able to iterate through these shapes and move each individually.
However the 7 rectangles seem to be encapsulated into the ONE shape and I can't access them.?
If I use .numChildren on the movie clip, it returns 1.
If I use .getChildAt("anything > 0") its a null reference exception.
Please help,
I don't understand how this is so difficult.
I have searched for ages to find the solution to this and for the life of me I can't.
Thanks in advance.
(P.s) Instantiating the rectangles in code works, but I need to be able to do this via Flash CC as I will be importing artist material for manipulation.
Your best choice is to make every shape in your made movie clip a movie clip as well.
In Flash go into your made MovieClip (I will call it containerMC for easier understanding) and make every shape a MovieClip by hitting F8. You can also give them instance names, if you want, just make sure they're unique.
Then your containerMC will return numChildren value 7 in your case.
You can move/access your shapes in the containerMC via getChildAt(), or by using their instance names that you've provided via containerMC.instance1 or containerMC["instance1"].
This question may get downvoted or go unanswered because it's not the greatest and incredible silly but anyway,
I'm taking an intro level Webanimation course this semester at UNI and had I know what their expectations are for our hand-in projects i would have never taken it up.
Basically the teacher taught us stuff to the extent of masking/tweening and very few mouse-event and basic function codes.
Now she is expecting us to make a god damn ENTIRE PIPE GAME. The one where there are a bunch of rotating pipes and you gotta rotate them in place before a timer runs out and then the water flows through them.
For this project I have to somehow figure out the following (even though she didn't teach any of this):
-creature a grid of rotate-able pipes (one mouse click I assume would do a 90 degree classic tween rotation of the object)
-creature some sort of logic hit-box value chain to make pipes decide when to fill with water (they fill with water (a.k.a turn blue inside as an animation) once they are connected to another water filled pipe, for example)
-creature multiple levels and a menu screen
-add a music track.
Now i know this site is for specific help only and you basically can't ask for help on an entire project, so for now if somebody could just help me out with the following:
How do I create a rotating pipe on mouseclick?
So I have my pipe movieclip created and I have my Mouse Event code ready but I don't have the faintest on how to make a tween within the pipe and connect it to the code so that it rotates on mouseclick.
So this far, let's say for one of the pipes, instance pipe_1, I want to do this:
pipe_1.addEventListener(MouseEvent.CLICK, fl_MouseClickHandler);
function fl_MouseClickHandler(event:MouseEvent):void
{
trace("Mouse clicked");
}
I also have the simple tween of rotation already created within the instance of the pipe, but dunno how to connect it to code.
I'm supposed to figure out what to put inside the function but I honestly have no clue. Hours of googling have come up with nothing either except a 12 dollar purchasable source code for an even more complicated pipe game.
I hope somebody can at least help a bit, and thanks.
The way to rotate a clip is via it's rotation property. It defaults to 0.
If you were set the rotation property of your tile to 90, you'd rotate your pipe tile 90 degrees.
for example :
pipe_1.rotation += 90;
A tween is a means of changing a property of a given DisplayObject over time. So what you want to do is tween your rotation property 90 degrees over time.
Here is a tutorial on Tweening - http://www.republicofcode.com/tutorials/flash/as3tweenclass/
I think it'd be more beneficial for you to take the time to learn about it, than to have me just write a few lines of code to solve your problem.
StackOverflow is a place where you can ask a question, AFTER you have tried something and have hit an issue.
I have provided you with the basic concept of what you need to do, and if you take the time to learn about tweening, you'll be able to achieve your goal rather simply.
There are also tweening libraries such as TweenLite and TweenMax that simplify tweening. Not sure if your class will allow you to use them, but worthwhile to check out for your own benefit.
You can find TweenLite here :
http://www.greensock.com/tweenlite/
Are you talking about a frame by frame tween? or tweening with code?
for frame by frame tweening, you can try to do this:
pipe_1.addEventListener(MouseEvent.CLICK, f1_MouseClickHandler);
function f1_MouseClickHandler(e:MouseEvent) {
pipe_1.gotoAndPlay(2); //if the tween starts at frame 2
}
For code tweening, just call the tween function inside that handler function
I need to create a single SWF with no external files, so I'm trying to add an internal preloader to my Flash project which has [embed] assets. I know [embed] causes problems with preloaders because it puts the assets on frame 1. I have tried the solutions recommended in these posts, where you set the document class to your preloader class:
Preloader for SWF with embed bytearray
How to create Preloader in AS3
I can get it to work, but ONLY if I comment out any lines of code that involve the stage, otherwise I get an "Error #1009: Cannot access a property or method of a null object reference." Those lines are essential though, so does anyone know how to fix those errors with the stage?
You haven't posted your code or your fla, so all I can do is share what works for me.
First, I wouldn't use Embed. Instead, use a swc. I have found that Embed can be unreliable as far as actually getting the entire asset in there (at least when publishing with Flash Builder + Flash Pro, which is my workflow).
Once you have your assets in a swc, try the following steps:
Set your export frame to Frame 10 (or any frame other than 1--I like frame 10 because then you can read the label that says "Preloader")
Put your actual content on frame 11. You can structure this a lot of ways. Since I program to Interfaces, I give whatever is on frame 11 an instance name and then use a setter to determine that my "first thing" has been placed on stage. I can get away with this because my main Document Class just knows the definition of the Interface, not the full implementation of the Class, so the Class does not need to load for the main Document Class to work. You probably aren't truly using the timeline and probably didn't program to interfaces, so you'll probably just set the base class of the symbol that's on frame 11 to the main logic of whatever you're trying to do.
Put your preloader graphics in Frame 1. I'm not sure why your stage references are so important. I, personally, don't use any logic in the preloader. Instead, I use a spinner that spans frames 1-10 (plus the word "Loading...". The spinner just spins while the classes load. The embed frame acts as a temporary "stop" that just holds the timeline back until those classes have been loaded. Once the classes have been loaded, the timeline will act like you called play() on it. So it really can be that simple. If you need it to be more complicated, give one of your preloader graphics an instance name and set up a getter/setter pair for it, then use the setter to trigger your logic that accesses the stage. You are pretty much guaranteed to have a valid stage at that point.
Word of warning: if you did make use of the timelime, you will get strange results if you try to jump to a frame that isn't loaded yet, so make sure to check to see if a given frame is loaded if it's near the end of your main timeline and your main timeline is heavy with assets before calling goToAndPlay() or goToAndStop().
Some references that might help you further:
Preloaders vs as 3 (I'd recommend you read the entire series this is part of. This is an amazing series I wish I'd found 3 years ago)
Solving the Frame 2 Problem Presentation and code
Combining the Timeline with OOP The example code for that is here (long story)
I've been working on an AS3 application and it's nearing completion. At the same time, one of the designers I work with has been building a movieclip in a separate .fla that acts as an intro animation to the application. The intro uses the 3D motion tweening capabilities of Flash CS4 / Player 10, and runs fine in the .fla in which it was built.
The problem is that when I import the movieclip into the main .fla for the application, when I dynamically instantiate the movieclip and add it to the stage, I get a barrage of the following runtime error:
ReferenceError: Error #1069: Property null not found on fl.motion.KeyframeBase and there is no default value.
at fl.motion::KeyframeBase/getValue()
at fl.motion::MotionBase/getValue()
at fl.motion::Animator3D/setTime3D()
at fl.motion::AnimatorBase/set time()
at fl.motion::AnimatorBase$/processCurrentFrame()
at fl.motion::AnimatorBase$/parentEnterFrameHandler()
I'm guessing just based on the number of errors like this that I receive that there's one per keyframe in the tweening movieclip. I've checked to ensure that the Flash publish settings are identical across the two .fla files, and although the stage sizes differ slightly, I don't think that's the issue here. I've also googled the issue and found nothing but but this lonely thread on kirupa.
Any thoughts?
Okay--turns out the problem was that we had a local version of the fl.motion package in the Actionscript source paths that was out of date. Now everything's tweening along happily!
As far as I know you once you apply a 3D Motion Tween to a clip, you can no longer modify it by actionscript.
I'd suggest either copying the clip, without the tween, so you can access and modify it via actionscript, as for the animation, maybe go for Copy Motion as Actionscript 3.0. It will spit out a nasty looking bulk of code. The alternative is to 'redo' the animation using something like TweenLite which has nicer syntax. You would select the motion tween, give it an instance then use instance.motion.keyframes to loop through the keyframes and get the position and rotation values for example.
It's not as ideal as it should be :(
Have a look at the flashthusiast.com website for more insights on the new tweens and how to work with them.
Goodluck,
George