Detecting Rotation Amount to Control Movie Clips

I created a movie clip consisting of a bar and a knob. When you click and drag the knob, the bar rotates through 360 degrees. I want to be able to detect the degree of rotation and use that metric to control other movie clips. The code to make the drag/rotate object work is...
handle.knob.onPress = function(){
handle.onMouseMove = function(){
var angle = Math.atan2(this._parent._ymouse-this._y,this._parent._xmouse-this._x);
this._rotation = angle*180/Math.PI;
this.knob._rotation = -this._rotation;
trace(angle);
trace(angle*180/Math.PI);
handle.onMouseUp = function(){
if (this.onMouseMove) delete this.onMouseMove;
I can trace the angle in radians and degrees but I don't know how to extract either value as a variable that can be used in a function to control a separate movie clip.

assign a variable to have the value of the _rotation or angle in your onMouseMove function. and use that variable's value wherever you like.

Similar Messages

How to control movie clips using mause scroller...?

....please look
http://www.nagaoka-id.ac.jp/gallery/gallery.html
...how to control movie clips using mause scroller...?

Hi Ldavinci, I have noticed your posts on that particular
site before. Just chiming in here... don't be afraid of Flash Help
menu. There's a wealth of information there and I've found it much
faster than waiting for a response from the forum. Then if it still
doesn't make sense, at least you have a basic idea of specifics to
ask.
If you search for mouse wheel, you'll see an example under
the Actionscript 2.0 Language Reference on this topic. That said,
here's the example:

Help with assignment- buttons that control movie clips

I am pretty new to flash and my professor gave us an assignment with little help or tutorials.
He wants us to create a SWF that features a house and it's front yard and two buttons.
One button that says Sunrise, and one that says Sunset.
When I push the sunrise button, the sun needs to rise above the house and stay there. When I push the Sunset button, it needs to set- and then a ufo needs to land on the lawn.
So i think I have a pretty good grasp on the assignment, but the actionscript is throwing me off. How can I make buttons that will control the sun movie clip to rise- stay above the house, and then set? The ufo is a whole new matter. The sunset button should make the sun lower and then a ufo land on the lawn.
Please help explain/link me to the proper tutorials. One thing that i'm worried about is that the sun will rise- and then stay above the house even if i click the sunset button.
Your help is greatly appreciated.

Well i can think of a few ways to do this.
Depending on what you have been taught so far you should be able to do this if you know how to make a button, a movie clip, and the basic script for the timeline. ie. play,stop, gotoandplay etc.
I understand you have been set a task and you want the answer straight away. But i doubt he would have given you anything you couldn't handle. Also I learnt more from trial and error and searching the net than from most of my teachers at coll and uni, It's frustrating i know, but the buzz you get when you finally crack it is amazing. Stick in there!
That being said i remember the panic I suffered and like to help so here's a thought:
You could just have the 2 buttons play a basic movie clip. The sky could rotate one way to make the sun rise and add a "stop" in the actions to make it stay there, and to the left to sunset with both images together but not being shown all the time by using a mask. You could even add in the ufo to the clip but this would only work if you added an extra part to the movie so that when the ufo has landed it flys out again and then begins to rotate the sun and moon again. ( buttons would be dissabled during the play modes to avoid chaos) This is just a quick thought. I'm sure there are several ways of doing this depending on how fancy it needs to be.
If your teacher really has given you no notes on buttons,movieclips and actionscript i would sujest Adobe TV. Nice videos that explain step by step. OR try downloading a tutorial file with buttons and movie clips and look at the coding they use in the file. Thats how i have learnt most of it since finishing Uni.
Good Luck
Cobie

Simple Button to Control Movie Clip

Hello,
I was relatively comfortable with AS 2.0, but am having a
hard time warming up to 3.0. I feel that this should be something
simple to find help online with, yet I'm finding it difficult to
get a simple answer.
I have a button that is inside a movie clip within another
movie clip:
mainMenu_mc > whoBtn_mc > whoButton
This button appears to work fine controlling a movie clip on
the same timeline. This is the code so far (on an Actions frame in
WhoBtn_mc):
whoButton.addEventListener(
MouseEvent.CLICK,
function(evt:MouseEvent):void {
whoGlow.gotoAndStop("click");
I have another movie clip on the main timeline that I would
like to control with this button:
blackFadeBottom_mc
What would the code look like for this?
Any help is appreciated - Thank you.

Thanks, I was able to place the code on the main timeline and
get a trace when I clicked on the movie clip instance itself. I
probably didn't explain what I was trying to do very well, so I
apologize.
What I need to do is to control this movie clip that is
physically placed on the main timeline (fadeBlackBottom) with the
button that is buried under two other movie clips
(mainMenu_mc>whoBtn_mc>whoBtn).
I would like the whoBtn to tell the fadeBlackBottom movie
clip to (what used to be)
_root.fadeBlackBottom.gotoAndPlay("play"); This will drop down a
box that will contain the content of my 'Who' link.
How can I accomplish this?
Thanks again,
Chuck

Detecting the end of a movie clip

Hi,
Objective: Display a book that the user can turn the pages to
view more text. I used a tutorial from the web to create the
turning page.
Process: On layer 1, frame 1 of the main time line, I put an
image of a book. On layer 2, frame 1 and also frame 2 of the main
time line, I put text for the book. I then created a movie clip
(MC) called PageTurnMC that looks like a page in the book is being
turned. On layer 3 of the main time line, I put an instance of the
MC and called it PageTurn. On layer 4 of the main time line, I put
a button to play the MC and advance to frame 2 called drawer1cont
(see code).
//code on the button used to turn the book's page
on (release) {
PageTurn.play(); //plays my PageTurnMC
gotoAndStop("drawer1cont"); //advance to the next frame of
text
Problem: I need to detect when the end of the MC before I
advance to the next frame. I have to use the PageTurnMC many times,
so it is not possible for me to put the action in the last frame of
MC. As of right now, my frame 2 text appears as the PageTurnMC
plays which is not what I want.
Thanks for any help.

I just tested it and got my quick example to work. Here are a
couple of possible areas to double check:
In the last frame of PageTurnMC, gotoAndStop must reference
the main movie clip, e.g. _root.gotoAndStop().
Also, make sure the parameter _root.frameID isn't in quotes
because it is a variable, not the actual string.
As I said, I'm not a Flash expert nor do I know the setup of
your movie, but this should work as long as you have all of your
references correct. If you can't get it to work, try to trace
necessary variables to make sure you are accessing the appropriate
variable.
The suggestion by nilu_only will also work, but it will waste
some cycles because you will have to wait for the movie clip to
end. Here is what I mean:
Immediately after playing PageTurn, accessing
PageTurn._currentFrame will return the currentFrame only once. So
if PageTurn isn't on its lastFrame, your condition statement
(PageTurn_currentframe == PageTurn._totalframe) will fail and
gotoAndStop will never be called.
Instead, you would need to wait for some time and continually
check the _currentFrame until the condition statement is true, e.g:
on (release) {
PageTurn.play();
while (PageTurn_currentframe != PageTurn._totalframe) {}
//wait until reaches the last frame
gotoAndStop ("drawer1cont")
This approach is likely to be suboptimal since you are
wasting cycles checking the current frame instead of just having
the movie let you know when it has reached the last frame.
Depending on how Flash handles that while statement, you could have
serious slowdown from that while statement. And since Flash doesn't
have a sleep() function, you would have to do some sort of
setTimeout() to slow down those checks. Either way, I would venture
to say this approach is better off avoided.

How to detect the end of a movie clip: what eventListener to use?

I'm doing a rather fancy button with up,down,rollover,rollout,and static states, something the standard flash button structure isn't capable of as far as I can tell, and believe me, I've tried it.
Here's the setup: My main timeline has a series of frames with stop(): scripts, and each frame has a movie clip representing what should happen during that state: still, rollover, rollout, mousedown, mouseup
I can't get the mouseup event to work.
Here's what I've tried so far that doesn't work:
1. in the imbedded movieclip, no script at the end. Result: This just loops the embedded clip.
2. in the imbedded movieciip, put gotoAndPlay("NextFrame"), where "NextFrame" is the label in the root movie where I want to go. result: loops clip
3. in the imbedded movieciip, put root.gotoAndPlay("NextFrame"), where "NextFrame" is the label in the root movie where I want to go. result: error
I think what I need to do is write an eventListener for the root actionscript, but I don't know what event to listen for.
What event is thrown when a movieclip finishes playing?
:<)McFrisco

You have to create your own mechanism(s) for detecting the end of a movieclip being reached. You can either build code into the end of the clip itself, possibly dispatching an event that is being listened for by a containing timeline, or you could continuously monitor the currentFrame of the clip to see if it equals the totalFrames value.

Controlling movie clip on timeline

Hi, newbie question.
If I put a movie clip on the main time line and that movie
clip has its own time line, is there a listener I can use to detect
when the movie clip I put on the main time line is finished
(reached its last frame).
Thanks.

Here's the simplest way:
Give the movieclip the instance name "myMC".
Then put this code on your main timeline:
onEnterFrame = function () {
if (myMC._currentframe == myMC._totalframes) {
DO THIS;
onEnterFrame = null;
In this function, every time a new frame turns over, it will
check if myMC has reached its end. When it does, it will execute
the commands I've written as DO THIS, and stop making this check.
Let me know if you run into any problems.

Controlling Movie Clip with actionscript Question

Dear All,
I have a movie clip named A which inside this movie clip
there is another Movie clip named B and inside B there is a listbox
component.
Inside Movie clip A there are 20 frames which at frame 10
there is a stop() script.
My question is how to control Movieclip A to run
gotoAndPlay(11) from MovieClip B when there is a click action to
the listbox?
Please Advise,
Ozhee

if A is on the _root timeline from anywhere in your _level0
swf you can use:

Controlling Movie Clip with as3

I try to controll my mc. I want put one MovieClip to other.
i use next code:
box_mc.addChild(pic_mc);
but its not working.
box_mc this is the a box movie clip, in this mc i want put my pic_mc.

In addition to what dmennenoh said,
DisplayObject's x and y properties are preserved no matter parent. In your case, it seems, original position of pic_mc is not 0/0. So when you place it inside the box - x and y are the same but now they are RELATIVE TO BOX. So, on screen it looks like it is outside the box but it is inside except that box's x and y are added.
For instnace, if the original coordinates are pic_mc.x = 200, pic_mc.y = 100 and box_mc.x = 50, box_mc.y = 20, when you add pic_mc as a child, it will have the came x and y but relative to box_mc (not its original container) and on the screen it will look like it is on x = 250 (box_mc.x + pic_mc.x) and y = 120 (pic_mc.y + box_mc.y).
box_mc's dimensions also change IF pic_mc x and y plus its width and height are outside of original box_mc boundaries. After you add child box_mc.width will be pic_mc.x + pic_mc.width and box_mc.height will be pic_mc.y + pic_mc.height.
I suspect that because there is a border in the box, you expected objects to placed within the border. Border in the box IS NOT the box but ANOTHER object (child) inside the box. In other words, box is a container. After pic_mc is added - it will contain both border and pic_mc - not border containing pic_mc. You see the difference?

Controlling movie clip play order

Good Day,
I have a web site that opens with two movie clips. One (A)
folds open some navigation menus, the other (B) opens some
rectangles that hold content. I want "A" to play out then, once it
is played, I want "B' to start. It sounds simple but I cannot get
the right code. I need something I can use for other applications
in other pages. I have this code so far; (naigation_mc = "A"
page01_mc = "B")
if (navigation_mc.play=true) {
page01_mc.gotoAndStop("start");
} else {
page01_mc.gotoAndPlay("start");
Perhaps there needs to be more code to controll this?

The most likely cause for you problem lies in the scope of
"this" in your case.
While traitional flash5 style buttons would have the imeline
in which they reside (e. g. the main timeline) as scope and a
comand like
on (release){
stop();
wouls stop he playhead of the main timeline.
Where as the more modern form of attaching code to a button
and the explicit use of
this handles buttons like movieClips so that a command like:
myButton.onRelease = function(){
this.stop();
will try to stop the buttons (= movieclips) own timeline.
I hope that helps
[This fact isn't stated clearly in the docs, but I at least
asked Macromedia (back then) to add it at least to the live
docs.]

Rotate a dynamilly created movie clip?

I need to rotate this[PhotoMovieName]. But the registration
point is the
upper left corner. I want them to rotate on center.
Is there a way to do this. Can I change the registration
point with AS?
PhotoArray = new
Array("1.jpg","2.jpg","3.jpg","4.jpg","5.jpg");
//trace(PhotoArray.length);
for(i=0;i<PhotoArray.length;i++){
trace(PhotoArray
PhotoMovieName = "Photo"+i;
var container:MovieClip =
this.createEmptyMovieClip(PhotoMovieName,
this.getNextHighestDepth());
this[PhotoMovieName].loadMovie("Photo.swf");
//this[PhotoMovieName].Photo_ldr._x=0;
//this[PhotoMovieName].Photo_ldr._y=-50;
this[PhotoMovieName]._rotation = 15*i;
this[PhotoMovieName]._y = 200;
this[PhotoMovieName]._x = 200;
//this[PhotoMovieName].contentPath = PhotoArray;
//this[PhotoMovieName].Photo_ldr.load();
//trace(this[PhotoMovieName]._x+"----"+this[PhotoMovieName]._y);
Thanks,
Jason

Jason,
>I need to rotate this[PhotoMovieName]. But the
registration point
> is the upper left corner. I want them to rotate on
center. Is there a
> way to do this. Can I change the registration point with
AS?
ActionScript doesn't let you change an asset's registration
point, but
the workaround is pretty easy. In your case (ActionScript
1.0/2.0) you'll
create a containing clip first, then create another inside it
-- as you're
doing -- then offset the inner clip's midpoint to meet the
registration
point of the container.
var container:MovieClip = this.createEmptyMovieClip(
PhotoMovieName, this.getNextHighestDepth()
So far, so good, right? Nothing has chnaged yet. Now,
because you've
created the variable container, and because the
MovieClip.createEmptyMovieClip() method returns a reference
to the newly
created clip, may use the container variable in place of
this[PhotoMovieName] -- because the reference to that clip is
stored in
container.
container.loadMovie("Photo.swf");
Again, that's functionally identical to the earlier version,
this[PhotoMovieName].loadMovie("Photo.swf"); ... now, the
important part at
this point is to *wait* until Photo.swf has loaded. Until it
does, you
can't really continue, as you've done, with rotation, x, and
y settings. If
you go the route of loadMovie(), you basically have to set up
a loop
(setInterval(), say, or onEnterFrame) and repeatedly check
the
MovieClip.bytesLoaded() and bytesTotal() methods of your
container clip
until the loaded bytes meet the total. Here's some detail on
that process
http://www.quip.net/blog/2006/flash/how-to-tell-when-external-swf-loaded/
... Finally, you'll want to bump the loaded left by half its
width and up by
half its height -- then move the container to compensate. So,
how do
reference the loaded clip inside the container? Aha! Well,
once Photo.swf
is loaded, it's container effectively *is* the loaded asset.
You'll need
two containers, then. An outer and an inner.
var outer:MovieClip = this.createEmptyMovieClip(
PhotoMovieName, this.getNextHighestDepth();
var inner:MovieClip = outer.createEmptyMovieClip("mcInner",
0);
inner.loadMovie("Photo.swf");
outer.onEnterFrame = function():Void {
if (inner.getBytesLoaded() >= inner.getBytesTotal()) {
inner._x -= inner._width / 2;
inner._y -= inner._width / 2;
this._x += inner._width / 2;
this._y += inner._width / 2;
this._rotation = 45;
delete this.onEnterFrame;
A couple key things to note: again, the variable outer
refers to
whatever string is contained by the PhotoMovieName variable.
This time,
there's also an inner clip inside that one. The inner clip is
basically
taking the place of your original container. Once loading
starts, a loop
checks the loading SWF, as described in that blog link, and
when the SWF has
finished, inner is offset left and up, outer is offset right
and down, and
finally outer is rotated.
David Stiller
Adobe Community Expert
Dev blog,
http://www.quip.net/blog/
"Luck is the residue of good design."

Trying to dynamically Rotate a Dynamically Created Movie Clip

Hi As3 Gods...
I want to rotate a movieClip that is created and animated by a function in the same Code window.
var electron:MovieClip=new MovieClip
createElectron(electron)
electron.rotation=90 ------> I expect the whole animated MovieClip to rotate. nothing happens though.
// I have a function that receives the electron and build / animates it
function createElectron( receives the MovieClip + more parameters ):MovieClip
{ bunch of codes
returns the MovieClip
It is achievable if I create an external MovieClip through library, and put the createElectron codes inside that movieClip and export it to ActionScipt and then rotate it, but then i donno how to assign Parameters to an external function in the movieClip when i call the electron, i want to be able to tell the function what is the radius, speed, etc. I have never tried creating Classes, donno if it helps me here or not. I think i m failing to sort of WRAP the MOvieClip and the animation inside, so i can rotate the whole thing when returned.

var electronsH:Array=new Array
var electron:Sprite = new Sprite();
buildElectronBeam(8,50,50)
function buildElectronBeam(atom,repeatHorizontal,wide)
             For loop{
                   var electron2:Sprite = new Sprite();
                  singleElectron(radius,4,electron2) // here i send electron2 to be animated and built up in the called function
                  electron2.rotation=90 // This does rotate the electron but not the animation defined for it.
                   electronsH[h]= electron2
                   addChild(electronsH[h]) // shows that animation is still horizontal
function singleElectron(radius,pixel,electron:Sprite)
createPoint(pixel)
    function createPoint(radio:uint)
        electron.graphics.beginFill(0xFFFFFF,1)
        electron.graphics.drawRect(0,0,pixel,pixel)
        addChild(electron)
        electron.addEventListener(Event.ENTER_FRAME, movepixels)
     function Animatepixels(e:Event)
     {   pixel starts to spin on a horizontal line}
I think my problem is I dont know how to attach this animation to be part of the MovieClip so i Can rotate the whole thing. What i was trying to achieve here is to say flash "Consider whatever going on in this singleElectron function as my MovieClip" but as we both see, electron is the movieClip and animate function just performs something without being a part of MovieClip itself.

How to detect collssion for random or Duplicated movie clips

Hey guys .. i am back with set of query..till now .. key
press movement a rocket (mc) is moving left right up down in a
defined stage area. and i am able to generate some fire balls
randomize falling from top. this is just i am duplicating the movie
clip(fireball_mc) .... now i want incase or when the rocket (mc)
touch the fire ball programm shold detect the collsion and generate
a score board. well for this i have tried a script for two movie
clips ... wchich is working but ..i don know or i m not gettng the
logic how to detect the collission for duplicated movie clips...
well i m just giving the script for oinly 2 movie clips
coliding...can any one tell me how to do it with randmize or
duplkicated mcs??
for 2 movie clip ...
_root.mc1.onEnterFrame = function() {
if(this.hitTest(_root.egg)) {
_root.result="Oh no..... we are dead";
} else {
_root.result="we are going fine";
(this is happening ..but let me know how can i get the same
result for ranndom mcs)
hope someone can help me out ...
i appriciate ur valuable time to read this..
thanking you

Hey thx for ur suggestion...but as i said m very much new to
actionscript (more designer) so i don have much idea... most of the
things i m doing for this game i m going through lots of references
then i tried to understand te codes m implmenting them to my
need..can u explain me little more about arrays u haves asked for
loops u asked me to use the hittest function..please /.. i will be
greatfull to u... thx

Nested Movie Clips

hi,
I recently downloaded a flash template that was built on AS2
and have been trying to figure out how it works for a couple of
weeks now (excuse my ignorance when it comes to AS). I have a
question about nested Movie Clips. The way the template is
constructed invovles a massive amount of nested movie clips and a
large number of instances of each movie clip. The way i understand
it is that if an instance of a movie clip is put on the stage and
given an instance name, any modifications to that movie clip should
be unique to that instance. However when i modify the colour of any
of the movie clips i select, it changes the colour of all other
instances.
Am i missing something obvious here??
Thanks in advance for your help
Kind Regards
Damien

Yea. This particular template i am working with appears to
change and manipulate colours dynamically as you said. Also it
doesn't have all of the content (txt and images) within the actual
flash document. They are all loaded dynamically through a txt
document and external files (jpgs amoungst others) which makes it
alot harder to edit since i dont fully understand the xml format
they have in the txt document. As well as this, the template has
no, and i mean NO documentation what so ever which makes it much
more difficult to work through. But i guess i will keep pluggin
away at it :)
Thanks again for your help Ned
Damien

Creating functions for movie-clips(serious problem)

Hello,
This is I think my third thread on these forums and in my
previous threads I had always got some help.Well, now I have
another serious problem, can you help me?
I am unable to create a function that can control movie
clips. Let me explain:-
I have 10 movie clips on the stage and I have assigned them
that whenever they crash to an object, they will go to a random
position. Writing this code ten times for each movie clip would be
very tedious, so, I thought about creating a function, but, it
doesn't work. Here's the function, can you correct it?
var object:movieClip;
function position(object) {
var testnum1:Number;
testnum1 = random(290)+36;
_root.object._y = -77.6;
_root.object._x = testnum1;
position(nameofmovieclip)
PLEASE HELP IS REQUIRED!!!!
Thanking All,
Chinmaya

Thanks for the reply,
I tried that, it worked!
But, now, I am encountering a really odd problem. This time
I'll give you my full code.The problem is, that now when the object
collides with another one, it changes its position according to the
code but then after a while, it just passes through the object.
Here's my code:-
function position(object) {
var testnum1:Number;
testnum1 = random(290)+36;
object._y = -77.6;
object._x = testnum1;
metal.onEnterFrame = function() {
_root.metal._y += speednum;
if (_root.metal.hitTest(_root.testline)) {
position(_root.metal);
speednum = random(6)+1;
Can you help me out again,
Thanks,
Chinmaya
P.S. I have tried to use the function like this:
position(metal), but it doesn't work. And yes, I have already
defines speednum somewhere before, so that isn't the
problem.

Detecting Rotation Amount to Control Movie Clips

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