That's because by the time you do the float, it's too late.
Things evaluate from the inside of the parentheses out. So first, it does
current / videoDuration. You say they both have values but don't say what
they are, but I'll guess they're integers.
Assuming current is less than duration, the result would probably be some
value less than 1, like 0.xxxx. But since both are integers, that'll just
convert the answer to 0 when doing integer math.
Then you have 0, and THEN you convert it to a float, making it 0.0, and
then you multiply it by mysize, but you'll just end up with 0.0.
INSTEAD, if you make one of the values a float BEFORE you divide it, the
division will be treated as floating point division, and you'll actually
get a number out of the process. What you really want is something like:
myvalue = (float(current) / videoDuration) * mySize
The difference is subtle, but important. Current is now converted to a
float BEFORE the division. Alternately you could float(videoDuration). It
doesn't really matter which is floated as long as at least one of the
operands is a float, which will force it to use floating point math and not
integer division. You were dividing and then floating the result AFTER the
divide, which is too late and gives you zero.
- Tab
At 10:01 AM 11/28/01 +0000, Richard Poole wrote:
>Hi
>
>I am currently trying to create a progress bar for a movieclip in director.
>I have managed to create the same progress bar before, but for some reason
>now it just wont work. I have managed to find the area which is going
>wrong.
>
>myvalue = float(current / videoDuration) * mysize
>
>'current', 'videoDuration' and 'mysize', all have values, however when I try
>read 'myvalue' no value is displayed.
>???????????
>
>Where am I going wrong?
>_______________________________________________________
>
>global myvalue
>global mysize
>global videoDuration
>global videoSprite
>
>property progressbar
>property videoSprite
>property videoDuration
>property mysize
>
>on beginSprite me
> initialize me
>end beginSprite
>
>on prepareframe me
> myupdate me
>end prepareframe
>
>on initialize me
> videoDuration = sprite(videoSprite).duration
> mysize = sprite(progressbar).width
>end initialize
>
>on myupdate me
> current = sprite(videoSprite).movieTime
> myvalue = float(current / videoDuration) * mysize <<<<< The problem
>area
> sprite(progressbar).width = myvalue
> member("check").text = string(myvalue) <<<<using this
>to debug
>end myupdate
>
>on getPropertyDescriptionList me
> description = [:]
> addprop description, #videoSprite, [#comment:"Video Sprite",
>#format:#sprite, #default:0]
> addprop description, #progressbar, [#comment:"Progress Sprite",
>#format:#sprite, #default:0]
> return description
>end getPropertyDescriptionList
>__________________________________________________________________
>
>Many thanks in advance
>
>Richard Poole
>
>
>[To remove yourself from this list, or to change to digest mode, go to
>http://www.penworks.com/lingo-l.cgi To post messages to the list,
>email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED])
>Lingo-L is for learning and helping with programming Lingo. Thanks!]
[To remove yourself from this list, or to change to digest mode, go to
http://www.penworks.com/lingo-l.cgi To post messages to the list,
email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED])
Lingo-L is for learning and helping with programming Lingo. Thanks!]
