Re: FLASH: scripting motion redux

[Catherine Kunicki]

Thanks Helen : )


A lissajous curve is basically a circle script that gets factored and makes

figure eights ( or multiples of figure eights) and some other closed loopy

shapes. Let me get this thing cooking and then I will gladly pass along

whatever works : ) 


Thanks for your scripts in text too - I was going to make screen dumps then

transcribe em.


Catherine


>

From: Helen Triolo <designeri-technica [dot] com>

> Subject: Re: FLASH: scripting motion redux

> 

> Hi Catherine.  Those bubbles, and most things that require continuous

> display of something that's changing over time, are done with a

> movieclip that has an onClipEvent(enterFrame) routine attached to it.

> In Flash 5, unlike Flash 4, the movieclip itself can be any number of

> frames, even 1, and it will loop continuously as long as it's on stage

> and controlled by an onClipEvent(enterFrame) routine.  So you just

> create your movieclip, drag it onto the stage in the frame you want it

> in, select it and type your code into the Object Actions tab.  (In Flash

> 4, you put the code into the movieclip itself, but in Flash 5, the code

> resides in the Object Actions for the instance of the movieclip, if that

> makes sense).  

> 

> The bubblemaker uses two movieclips: bubbleclip, which just has 1 frame

> with a bubble graphic, and bubblemaker, which has a masked copy of

> bubbleclip -- also only 1 frame.  Once bubblemaker has been dragged to

> the stage, this code goes into the Object Actions tab to make randomly

> floating up bubbles that get deleted when they reach a certain y

> position.  The complications are all in generating the randomness --

> moving the bubbles isn't hard at all (it's just changing the y position

> every time the routine is executed).

> 

> onClipEvent (load) {

> nTimeCount = 71;

> nBubbleCount = 0;

> }

> onClipEvent (enterFrame) {

> if (nTimeCount > 70) {

> duplicateMovieClip (mcBubbleClip, "mcBubbleClip" + ++nBubbleCount,

> nBubbleCount);

> // bubbles start in random place between x=0 and x=200

> this["mcBubbleClip"+nBubbleCount]._x = math.random()*200;

> // bubble size is between 30 and 100% of symbol size

> nBubbleSize = 30+math.random()*70;

> this["mcBubbleClip"+nBubbleCount]._xscale = nBubbleSize;

> this["mcBubbleClip"+nBubbleCount]._yscale = nBubbleSize;

> this["mcBubbleClip"+nBubbleCount]._y = 330;

> // make new bubble between every 40 and 60 frames

> nTimeCount = math.random()*20;

> }

> nTimeCount++;

> // delete bubbles at top and

> // move all remaining clips up one pixel per frame

> for (i=1; i<=nBubbleCount; i++) {

> if (this["mcBubbleClip"+i]._y < -20) {

> removeMovieClip("mcBubbleClip"+i);

> } else {

> this["mcBubbleClip"+i]._y -= 1;

> }

> }

> }

> 

> So in your case, you'd put the code that moves a clip along a lissajous

> curve into the onClipEvent(enterFrame) routine, and it would display

> continuously.  I don't know what a lissajous curve is, but it sounds

> interesting -- if you'd care to post or send me the code for it, I'd be

> glad to try to stick it into the bubblemaker and see if I can get it to

> do something.

> 

> Regards,

> Helen 

> -----------------------------------------------------

> i-Technica  ·  http://i-technica.com  ·  301.424.6037

> developer resources: http://i-technica.com/whitestuff

> 

> Catherine Kunicki wrote:

>> 

>> Hi.

>> 

>> Cat's back in tutorial mode : )

>> 

>> I asked this question back in August or September and recieved a couple of

>> great answers which I didn't save and can't seem to dig up in either flasher

>> or flashcoders archives.

>> 

>> I have some old scripts (Hypertalk and Lingo versions) which move an object

>> in lissajous curve patterns.  Since its familiar territory, I want to try

>> them out with Flash 5 actionscript.

>> 

>> I have my movieclip moving in a "while (i < somenumber)" loop. My clip moves

>> correctly, however all you can see is really the first and final positions.

>> I need ideas (or links to tutorials) about the best way to show the steps.

>> 

>> I think using movies with more than one frame might have been the answer : )

>> 

>> I noticed helen triolo's elegantly moving bubbles, which I might try and

>> figure out - looks like there might be some help there - but if anyone can

>> give me a jump start, I'd appreciate it.

>> 

>> Catherine



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