as3 drawing

CaTFooD

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lines:59
license : MIT License
modified : 2010-07-14 11:56:51

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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 = 85;

private var r_2:int = 60;

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;

}

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