// forked from CaTFooD's as3 drawing package { import flash.display.Bitmap; import flash.display.BitmapData; import flash.display.Sprite; import flash.events.Event; /** * ... * @author CaTFooD */ public class Main extends Sprite { private var bitmapData:BitmapData; private var k:Number = 0; private var R:Number = 200; private var beginX:Number = 0 private var beginY:Number = 0; private var angle:Number = 0; private var angle_s:Number = 0; private var s_x:Number = 0; private var s_y:Number = 0; public const raids:Number = 180 / Math.PI; private var g:int; private var b:int; private var r:int; //改这两个 private var r_1:int = 75; private var r_2:int = 20; public function Main():void { if (stage) init(); else addEventListener(Event.ADDED_TO_STAGE, init); } private function init(e:Event = null):void { stage.frameRate = 1000; removeEventListener(Event.ADDED_TO_STAGE, init); // entry point bitmapData = new BitmapData(500, 500); var bitmap:Bitmap = new Bitmap(bitmapData); this.addChild(bitmap); r = Math.random() * 255; g = Math.random() * 255; b = Math.random() * 255; addEventListener(Event.ENTER_FRAME, enterframeHandler); } private function enterframeHandler(e:Event):void { //大圆坐标 beginX = Math.cos(angle_s / raids) * (R-r_1); beginY = Math.sin(angle_s / raids) * (R-r_1); s_x = Math.cos((angle-angle_s) / raids) * r_2; s_y = Math.sin((angle-angle_s) / raids) * r_2; //bitmapData.setPixel(beginX + 200, beginY + 200, 0xFF0000); //bitmapData.setPixel(s_x+200, s_y+200, 0x000000); bitmapData.setPixel(beginX+s_x+200, beginY-s_y+200, (r<<16|g<<8|b)); angle_s += 1; angle += (R / r_1) * 1; if (angle_s % 4800 == 0) { r = Math.random() * 255; g = Math.random() * 255; b = Math.random() * 255; r_2 += 5; } } } }