>> have the items align into a circle at the nearest point, *keeping the same angle*
I'm not sure what that means exactly, but check out Point.polar() Jason Merrill Instructional Technology Architect Bank of America Global Learning Join the Bank of America Flash Platform Community and visit our Instructional Technology Design Blog (Note: these resources are only available for Bank of America associates) -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of jared stanley Sent: Wednesday, August 11, 2010 3:51 PM To: Flash Coders List Subject: [Flashcoders] Trigonometry Problem hey all, working on getting a grid to expand into a circle. I would like to: - place items in a grid - calculate angle from centerpoint(or any desired point) - have the items align into a circle at the nearest point, *keeping the same angle* here's my progress: http://lab.freestyleinteractive.com/jared/maths/radius.html the start and end is pretty close to what i want, but i'd like the items to rearrange keeping the same angle, so an item that was on the top left would stay on the top left area and an item to the right in the grid would stay to the right in a circle. hope this makes sense. code is below, thanks for any help! private function init():void{ //create and center container clip mainClip = new MovieClip(); //container clip for all items addChild(mainClip); mainClip.x = stage.stageWidth / 2; mainClip.y = stage.stageHeight / 2; createParticles(); //draw circle around centerpoint for visual reference mainClip.graphics.lineStyle(2, 0xffffff, .5); mainClip.graphics.drawCircle(0, 0, 100); // stage.addEventListener(MouseEvent.CLICK, expand); } private function createParticles():void{ for(var i:int = 0; i<maxParticles; i++){ var particle:Particle = new Particle();//just a sprite with some properties //create grid, calculate original X & Y positons; particle.i = i; particle.x = (particle.width + 5) * (i % 20); particle.y = (particle.height + 5) * Math.floor(i / 20); particle.ox = particle.x; particle.oy = particle.y; //calculate angle from the 0 point; var rad:Number = Math.atan2(mainClip.x-particle.y, mainClip.y-particle.x); var angle:Number = rad * 180 / Math.PI; particle.angle = angle; mainClip.addChild(particle); //put all particles in an array to be referenced below particlesArr.push(particle); } //code below is to recenter the grid on the centerpoint instead of top left var tmpw:Number = mainClip.width; var tmph:Number = mainClip.height; //loop through to offset the grid so it's even within the page for(i = 0; i<particlesArr.length; i++){ var p:Particle = particlesArr[i]; p.x -= tmpw* 0.5; p.y -= tmph* 0.5; p.ox = p.x; p.oy = p.y } addEventListener(Event.ENTER_FRAME, moveAll); } private function expand(e:MouseEvent):void{ isGrid = !isGrid; for each (var p in particlesArr) { p.tgtx = Math.cos(p.angle)*mag; p.tgty = Math.sin(p.angle)*mag; } } private function moveAll(e:Event):void{ var mainTgtX:Number; var mainTgtY:Number; if(!isGrid){ for each (var p in particlesArr) { p.x += (p.tgtx - p.x) /20; p.y += (p.tgty - p.y) /20; } }else { for each (p in particlesArr) { p.x += (p.ox - p.x) /20; p.y += (p.oy- p.y) /10; } } _______________________________________________ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders _______________________________________________ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
