# Swarming flies

**URL:** <https://forum.kirupa.com/t/swarming-flies/228527>\
**Category:** Uncategorized\
**Created:** [June 8, 2007, 4:08pm UTC](https://forum.kirupa.com/t/swarming-flies/228527 "2007-06-08T16:08:51Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![jsn\_greenbag](https://avatars.discourse-cdn.com/v4/letter/j/ea666f/32.png) [@jsn\_greenbag](https://forum.kirupa.com/u/jsn_greenbag)\
**Post date:** [June 8, 2007, 4:08pm UTC](https://forum.kirupa.com/t/swarming-flies/228527/1 "2007-06-08T16:08:51Z")

</div>

ok, i’ve just started learning AS3 so this isn’t as advanced or even nearly as useful as most stuff posted here.

Anyway, this is a class that creates a bunch of tiny flies that fly towards and swarms around a specified point. that point can be defined as a movieclip (the centerpoint of that movieclip) and the flies will then follow that movieclip if it moves.

here is the class:

[http://home.graffiti.net/ct16/Flies.as](http://home.graffiti.net/ct16/Flies.as)

description:

call the script like this from a .fla:

```
ActionScript Code:
[FONT=Courier New][LEFT][COLOR=#000000] **var** [/COLOR] myFlies:Flies = [COLOR=#000000] **new** [/COLOR] Flies[COLOR=#000000]([/COLOR]n:[COLOR=#0000FF]int[/COLOR], mcFollow:[COLOR=#0000FF]MovieClip[/COLOR][COLOR=#000000])[/COLOR];

```

[/LEFT]  
[/FONT]

“mcFollow” is a movieclip that the flies will follow. if no “mcFollow” is provided you can still access the position that the flies are attracted to by using \_position like this:

```
ActionScript Code:
[FONT=Courier New][LEFT]myFlies._position.[COLOR=#000080]x[/COLOR] = [COLOR=#000080]100[/COLOR];

```

myFlies.\_position.[COLOR=#000080]y[/COLOR] = [COLOR=#000080]100[/COLOR];  
[/LEFT]  
[/FONT]

if a “mcFollow” was provided then changing \_position will also change the position of “mcFollow”.

“n” is the amount of flies. default is 1. the amount of flies can also be set later with setAmount() like this:

```
ActionScript Code:
[FONT=Courier New][LEFT]myFlies.[COLOR=#000080]setAmount[/COLOR][COLOR=#000000]([/COLOR]n:[COLOR=#0000FF]int[/COLOR][COLOR=#000000])[/COLOR];

```

[/LEFT]  
[/FONT]

here’s an example with 100 flies following the cursor:

View example  
[http://home.graffiti.net/ct16/Flies\_Test.html](http://home.graffiti.net/ct16/Flies_Test.html)

i think the class is kinda poorly written and could be made more efficient and stuff, but… i don’t care, it works!