Re: FLASH: _xscale & xscale??

[Dorian Nisinson]

	Quotes around words, numbers, etc. mean that Flash must deal with the

word as a word. Without quotes around words or numbers, those items must

be evaluated to see what value they contain and that value must be

treated as arithmetic. For example, when you do a set variable (instruct

Flash that the word MyVariable is the container for the value of a

property like _alpha ) amount of transparency like this:


Set Variable: "MyVariable" = Get property ("myMovieClip",_alpha)


	Assume that the movie clip with the Instance Name of myMovieClip (note

that the Instance name of the movie clip myMovieClip is in quotes too)

is completely visible when you first have Flash perform this action. So

MyVariable contains the number 100 which stands for 100%,  which means

completely visible without any transparency. 


	Now if you want to have myMovieClip gradually fade every time the users

comes to a particular frame. You want that 100 percent to get smaller

and smaller so you would create another little script that would do that

job.


	You create this action:


Set Variable: "MyVariable" = MyVariable - 10

Set Property: ("myMoveClip",Alpha) = MyVariable


	What the first line does could be read like this:

Set Variable: "MyVariable" = 100 - 10 


	The statement after the equal sign contains the same variable but

without the quotes. The reason for this is to let Flash know that we

want it to deal with the contents of MyVariable (that 100 we started

with in this case) and not the container name. 


	One way to think of it is as an envelope with the variable name on the

outside and the info or data inside the envelope. When you want Flash to

look at the word or words, like a variable name or a path to a movie

clip, or text you are using as text, put quotes around it. Flash will

read the name on the envelope. If you want Flash to look at the contents

of the variable, the data inside the envelope, then don't use quotes.


	There is much more to this but it is a start.


Dorian


flash tech wrote:

> 

> Hi,

> 

> what is the difference between "_" and without "_"?  I can't figure it

> out...

> I'm sure this is easy question but I'm new to action script.

> Any idea?

> 

> Thanks

> 

> Rie

> 

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