{"id":1230,"date":"2011-02-28T21:30:25","date_gmt":"2011-03-01T04:30:25","guid":{"rendered":"http:\/\/www.nathalielawhead.com\/candybox\/?p=1230"},"modified":"2014-03-18T23:28:54","modified_gmt":"2014-03-19T06:28:54","slug":"super-simple-particle-effect-actionscript-3-0","status":"publish","type":"post","link":"http:\/\/www.nathalielawhead.com\/candybox\/super-simple-particle-effect-actionscript-3-0","title":{"rendered":"Super Stupidly Simple Particle Effect (Actionscript 3.0)"},"content":{"rendered":"

Here’s a quick particle effect I threw together. Thought I’d put it up here… figuring it might help some hapless googler searching for a quick fix, since it’s a super simple class you can easily reuse or (quite possibly) extend… probably.
\nDownload source here.<\/a><\/p>\n

[swfobj src=”http:\/\/nathalielawhead.com\/sourcefiles\/Mouse_Particle_Effect\/silly_little_particle.swf” height=”400″ width=”480″]
\nMouse over the above area to preview.<\/strong><\/p>\n

The AS (Particle.as)<\/p>\n

<\/p>\n

\n
package<\/span> \r\n{<\/span>\r\n\r\n\timport<\/span> flash.utils.Timer<\/span>;<\/span>\r\n\timport<\/span> flash.events.TimerEvent<\/span>;<\/span>\r\n\timport<\/span> flash.geom.Point<\/span>;<\/span>\r\n\timport<\/span> flash.display.MovieClip<\/span>;<\/span>\r\n\r\n\r\n\tpublic<\/span> class<\/span> Particle extends<\/span> MovieClip\r\n\t{<\/span>\r\n\r\n\t\tprotected<\/span> var<\/span> position:Point<\/span>;<\/span>\r\n\t\tprotected<\/span> var<\/span> vector:Point<\/span>;<\/span>\r\n\t\tprivate<\/span> var<\/span> gravity:int<\/span>;<\/span>\r\n\t\tprivate<\/span> var<\/span> friction:Number<\/span>;<\/span>\r\n\t\tprivate<\/span> var<\/span> maxIterationsAlive:Number<\/span>;<\/span>\r\n\t\tprivate<\/span> var<\/span> iterationsAlive:Number<\/span>;<\/span>\r\n\t\tprotected<\/span> var<\/span> update_i:Timer<\/span>;<\/span>\r\n\r\n\t\tpublic<\/span> function <\/span>Particle<\/span>(<\/span>p:<\/span>Point<\/span>,<\/span> v:<\/span>Point<\/span>,<\/span> g:<\/span>int<\/span>,<\/span> f:<\/span>Number<\/span>)<\/span>\r\n\t\t{<\/span>\r\n\t\t\t\r\n\t\t\tposition =<\/span> p;<\/span>\r\n\t\t\tvector =<\/span> v;<\/span>\r\n\t\t\tgravity =<\/span> g;<\/span>\r\n\t\t\tfriction =<\/span> f;<\/span>\r\n\t\t\tmaxIterationsAlive =<\/span> 10<\/span>;<\/span>\r\n\t\t\titerationsAlive =<\/span> 0<\/span>;<\/span>\r\n\r\n\t\t\tupdate_i =<\/span> new<\/span> Timer<\/span>(<\/span>25<\/span>);<\/span>\r\n\r\n\t\t\tupdate_i.<\/span>addEventListener<\/span>(<\/span>TimerEvent.<\/span>TIMER<\/span>,<\/span> update);<\/span>\r\n\t\t\tupdate_i.<\/span>start<\/span>();<\/span>\r\n\t\t}<\/span>\r\n\r\n\t\tpublic<\/span> function <\/span>update<\/span>(<\/span>evt:<\/span>TimerEvent<\/span>):<\/span>void<\/span>\r\n\t\t{<\/span>\r\n\t\t\tif<\/span> (<\/span>iterationsAlive ><\/span> maxIterationsAlive)<\/span> {<\/span>\r\n\t\t\t\tupdate_i.<\/span>removeEventListener<\/span>(<\/span>TimerEvent.<\/span>TIMER<\/span>,<\/span> update);<\/span>\r\n\t\t\t\tupdate_i.<\/span>stop<\/span>();<\/span>\r\n\t\t\t\tparent.<\/span>removeChild<\/span>(<\/span>this<\/span>);<\/span>\r\n\t\t\t}<\/span>\r\n\r\n\t\t\t\/\/the * 10  determines what direction it shoots out of - in this case the side<\/span>\r\n\t\t\tposition.<\/span>x<\/span> +=<\/span>  vector.<\/span>x<\/span> +<\/span> Math.<\/span>random<\/span>()<\/span> *<\/span> 10<\/span>;<\/span> \r\n\t\t\tposition.<\/span>y<\/span> +=<\/span>  vector.<\/span>y<\/span> +<\/span> Math.<\/span>random<\/span>()<\/span> *<\/span> 10<\/span>;<\/span>\r\n\r\n\t\t\tvector.<\/span>y<\/span> +=<\/span>  gravity;<\/span>\r\n\t\t\tvector.<\/span>x<\/span> *=<\/span>  friction;<\/span>\r\n\t\t\t\r\n\t\t\t\/\/apply positions to the clip<\/span>\r\n\t\t\tx =<\/span> position.<\/span>x<\/span>;<\/span>\r\n\t\t\ty =<\/span> position.<\/span>y<\/span>;<\/span>\r\n\t\t\t\r\n\t\t\talpha -=<\/span> .<\/span>01<\/span>;<\/span> \/\/fade<\/span>\r\n\r\n\t\t\titerationsAlive++;<\/span>\r\n\t\t}<\/span>\t\t\r\n\t\t\r\n\t}<\/span>\r\n}<\/span>\r\n<\/pre>\n<\/div>\n
And simply link it to a movieclip instance:<\/p>\n
\"Particle<\/p>\n
There! A stupid simple particle effect.<\/p>\n
GRAB THE SOURCE HERE<\/a>
\nVisit the sourcefiles directory here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Here’s a quick particle effect I threw together. Thought I’d put it up here… figuring it might help some hapless googler searching for a quick fix, since it’s a super simple class you can easily reuse or (quite possibly) extend… probably. Download source here. [swfobj src=”http:\/\/nathalielawhead.com\/sourcefiles\/Mouse_Particle_Effect\/silly_little_particle.swf” height=”400″ width=”480″] Mouse over the above area to preview. The AS (Particle.as) package { import flash.utils.Timer; import flash.events.TimerEvent; import flash.geom.Point; import flash.display.MovieClip; public class Particle extends MovieClip { protected var position:Point; protected var vector:Point; private var gravity:int; private var friction:Number; private var maxIterationsAlive:Number; private var iterationsAlive:Number; protected var update_i:Timer; public function Particle(p:Point, v:Point, g:int,...<\/p>\n","protected":false},"author":1,"featured_media":4522,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[12],"tags":[],"class_list":["post-1230","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-resources"],"_links":{"self":[{"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/posts\/1230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/comments?post=1230"}],"version-history":[{"count":15,"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/posts\/1230\/revisions"}],"predecessor-version":[{"id":3028,"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/posts\/1230\/revisions\/3028"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/media\/4522"}],"wp:attachment":[{"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/media?parent=1230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/categories?post=1230"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.nathalielawhead.com\/candybox\/wp-json\/wp\/v2\/tags?post=1230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}