treeのアレ
tree like a processing sample
@author naoto.koshikawa
package
{
import flash.display.BitmapData;
import flash.display.Graphics;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;
import flash.geom.Point;
[SWF(width = "464", height = "465", backgroundColor = "0x000000", frameRate = "24")]
/**
* tree like a processing sample
* @author naoto.koshikawa
*/
public class Main4 extends Sprite
{
// _____________________________________________________ Property
/** base container which virtual stage */
private var _base:Sprite;
/** tree angle in radian */
private var _radian:Number;
// _____________________________________________________ Method
/**
* constructor
*/
public function Main4()
{
createBase();
addEventListener(Event.ENTER_FRAME, enterFrameListener);
}
/**
* create base container which move center position in virtual
*/
private function createBase():void
{
_base = new Sprite();
_base.x = stage.stageWidth / 2;
_base.y = stage.stageHeight;
var dotData:BitmapData = new BitmapData(2, 2, true, 0x00000000);
dotData.setPixel32(0, 0, 0x33000000 | 0x00FFFFFF * Math.random());
var dot:Shape = new Shape();
dot.graphics.beginBitmapFill(dotData);
dot.graphics.drawRect(-_base.x, -_base.y, stage.stageWidth, stage.stageHeight);
_base.addChild(dot);
addChild(_base);
}
/**
* draw line method
*/
private function draw(start:Point, radian:Number, radius:Number):void
{
if (radius < 3) return;
var gr:Graphics = _base.graphics;
gr.lineStyle(1, 0x111111 * Math.random() + 0xEEEEEE);
gr.moveTo(start.x, start.y);
var end:Point = new Point(start.x + Math.cos(radian) * radius, start.y + Math.sin(radian) * radius);
gr.lineTo(end.x, end.y);
gr.endFill();
draw(end, radian + _radian, radius * 0.66);
draw(end, radian - _radian , radius * 0.66);
}
// _____________________________________________________ Listener
/**
* enter frame event listener
* @param event
*/
private function enterFrameListener(event:Event):void
{
_radian = (1- (mouseX / stage.stageWidth)) * (Math.PI / 2) - Math.PI / 2;
_base.graphics.clear();
draw(new Point(0, 0), -Math.PI/2, stage.stageHeight / 3 * (1-(mouseY / stage.stageHeight)));
}
}
}