RE: FLASH:scripting movement?

[Paul Willoughby]

Hi Bill


A really good place to start for this kind of thing is

www.moock.org/webdesign/flash . His tutorials on programmatic movement

are very simple and very clear. There's also some really good tutorials

at www.flashkit.com , just look in the scripting section.

Another thing you should be aware of is that Flash 5 has considerably

more sophisticated code for doing this kind of thing, like you can know

script colour changes.


As a little taster, here's a script for moving a clip horizontally

across the screen. It's all 'bout GetProperty and SetProperty (which you

can read about in the manual). This would be a movie clip with just 2

frames of code that moves another clip on the main timeline called

"myClip":


Frame 1:


SetProperty("/myClip", _y) = GetProperty("/myClip", _y) + 5


Frame 2:

SetProperty("/myClip", _y) = GetProperty("/myClip", _y) + 5

GotoAndPlay(1)


Basically you're just telling a movie clip to move to it's current

position plus five pixels every frame. To speed up the movement, just

increase the amount you move it each time (distance logically maps to

speed with vectors) or increase the frame rate of your movie. If you

replaced "_y" in the above code with "_rotation" you'd cause the clip to

rotate at 5 pixels a frame (there is a bug with the rotation property

however. You have to reset the scale of your clip

(SetProperty("/myClip", _scale) = 100) every frame or it starts

shrinking!)


hth


paul


> -----Original Message-----

>

From: Bill Gunter [billgistreaminteractive [dot] com (mailto:billgistreaminteractive [dot] com)]

> Sent: 21 December 2000 17:33

>

To: flasherchinwag [dot] com

> Subject: RE: FLASH:scripting movement?

> 

> 

> Hello everyone,

> 

> I consider myself to be a pretty good flash designer and 

> animator but lately

> I have been trying to delve into the scary world of action 

> scripting, as it

> is necessary to make things work the way I need them to. My 

> question is, is

> there an effective way to replace some basic tweening with 

> action scripting?

> I have noticed that most movement that has been scripted 

> moves very smoothly

> and saves a conciderable amount of file size. If so could you 

> please give me

> some examples of scripts for something like rotating an 

> object at a certain

> speed or adding a random alpha tween between 10% and 90%, 

> something I can

> work with to better understand scripting. It is critical that 

> I learn this

> and I appreciate any help that you all can give.

> 

> Thanks in advance,

> Bill

> iStream Interactive

> 


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