Random Color Fill

[DanDaMan]

How can I fill a MovieClip with a random color using Actionscript 3?

[.ral:cr]

Math.random()*0xffffff

[DanDaMan]

I tried using this.color=Math.random()*0xFFFFFF but it did not work.

[JTF2]

import flash.geom.ColorTransform;
var ct:ColorTransform = new ColorTransform();
ct.color = Math.random()* 0xffffff;
this.transform.colorTransform = ct;

[BeerOclock]

I do this, but its probably not the best way:



static public function rand_color():uint {
return uint(rand_between(0, 255) + 256*rand_between(0, 255) + 65536*rand_between(0, 255));
}



Edit: oops, didnt post my rand_between() function.
Oh well, you can figure it out ;)

[bLasTamos]

How can I fill a MovieClip with a random color using Actionscript 3?


with (yourmc.graphics) {
beginFill(Math.random()*0xFFFFFF);
drawRect(0, 0, width, height);
endFill();
}

[.ral:cr]

I do this, but its probably not the best way:



static public function rand_color():uint {
return uint(rand_between(0, 255) + 256*rand_between(0, 255) + 65536*rand_between(0, 255));
}



Edit: oops, didnt post my rand_between() function.
Oh well, you can figure it out ;)

i don't think is good at all. when you have each channel value separately you combine them with bitwise operators ">>"
what you have there is a simple adding operation.

or is the uint doing something special? i'm not familiar with it.

[TheCanadian]

It would still work but there is no reason to not just use 0xFFFFFF * Math.random() or 16777215 * Math.random() (which I think would be a cuny faster).

[bLasTamos]

what you have there is a simple adding operation.

His code should work, he actually does the bitwise operations, only with a multiplication instead of rotation. He multiplies by 0x100 for blue and 0x10000 for red, so it works.

[BeerOclock]

It definetly works, because Ive been using it.
Its just probably not as clever or fast as 0xFFFFFF * Math.random(), Which I am now using :)



I tried using this.color=Math.random()*0xFFFFFF but it did not work.


Ive never seen that kind of code for setting color. Maybe thats the problem?
Try this instead :


this.color = 0x00ff00;

is the object solid green? If that doesnt work either, then its not the random code thats the problem, its the "this.color" part.

[Kasimir]

How to do this with, like random color between colors (like 5 hex colours) where it would randomize it + multiple movieclips would randomize in the same color?

[DanDaMan]

Thanks a lot, guys. Works like a charm =D

[Krilnon]

0xFFFFFF * Math.random() or 16777215 * Math.random() (which I think would be a cuny faster).


They compile into the same thing… so the advantage would be ridiculously minimal and only exist when compiling. The number gets put into the SWF's integer constant pool, where it's just a 32-bit integer instead of a string like it is in code, and is fetched later in bytecode with pushint.

Sorry for making a post about something like this… I have been doing something related to this recently so it was on my mind when reading your post. :P

[TheCanadian]

They compile into the same thing… so the advantage would be ridiculously minimal and only exist when compiling. The number gets put into the SWF's integer constant pool, where it's just a 32-bit integer instead of a string like it is in code, and is fetched later in bytecode with pushint.

Sorry for making a post about something like this… I have been doing something related to this recently so it was on my mind when reading your post. :P


Well I did want to know, I didn't know if Flash converted at run or compile time. Although logically I should have :|