MX - TV snow/fuzz effect

programming flash
1

Does anyone know how to recreate the TV snow effect, you know when you’re trying to tune in a tv channel and all you get is the ‘fuzz’?

any help would be most appreciated.

wilma

2

suppose you have a small dot with instance name ‘dot’. now add this as to frame 1. (this is very cpu intensive)


_root.onEnterFrame=function(){
for(i=0;i<500;i++){
dot.duplicateMovieClip("dot"+i,i)
this["dot"+i]._x=Math.random()*Stage.width
this["dot"+i]._y=Math.random()*Stage.height}}
3

or instead of recreating all of the dots every frame, you could place them there once, and then inside the dot MC have something like


myColor = new Color(this);
onEnterFrame = function(){
random(2)==0 ? myColor.setRGB(0x000000) : myColor.setRGB(0xFFFFFF);
}

(untested)

4

now it’s tested, and it works.

5

hey I have been looking or this same effect too, i downloaded your fla but the fuzz looks a little big (big dots) and just doesn’t have that TV effect with the huge dots. Is it just me or what?

6

thanks for your help jingman, i’ve played around with the code and got it just the right size for what i want to do - the only stumbling block is that i want the effect to come through a rounded corner rectangle which is to be the mask, unfortunately it doesn’t look like you can get this effect to sit behind a mask.

any ideas how i could create the rounded corners??

wilma.

7

BillyBaker:

Yeah, my dot MCs are big (10px by 10px) - real easy to fix.

Wilma:

like you said, just mask it. Put my “spawnArray” function inside an MC, and mask that MC - this should work. If it doesn’t work, take a look at how I use attachMovie - that might be the problem (I wrote that array function a long time ago).

8

Wilma, here is your TV :slight_smile:

9

That’s pretty CPU intensive tho…I got a pretty good comp and it lagged Ctrl+entering it.

10

Yup, I noticed the same thing.

Pretty sure the best way to create such an effect is to just make a 5 or so frame MC each with a different static pattern (easily created in photoshop).

11

Yea, even with the simple duplicate movie clip deal it would still take up a few cycles…