forked from: flash on 2009-6-6
/**
* Copyright amane ( http://wonderfl.net/user/amane )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/fG21G
*/
package
{
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.ui.Mouse;
[SWF(backgroundColor = "0x000000", frameRate = "24")]
public class NewClass extends Sprite {
//メンバ変数
private var m_iCount:int = 1000; //カウント
private var m_aBall:Array; //Ballオブジェクト格納用配列
private var m_nBounce:Number = -1; //跳返り
private var m_nFriction:Number = 0.95; //摩擦
private var m_nTargetX:Number = stage.stageWidth / 2; //目標地点X
private var m_nTargetY:Number = stage.stageHeight / 2; //目標地点Y
private var m_oSprite:Sprite; //base
private var m_nSpring:Number = 0.001; //バネ
private var m_nSpringLngth:Number = 60; //バネの元の長さ
private var m_nRefRight:Number = 0; //壁(右)
private var m_nRefLeft:Number = 0; //壁(左)
private var m_nRefBottom:Number = 0; //壁(下)
private var m_nRefTop:Number = 0; //壁(上)
//コンストラクタ
public function NewClass()
{
init();
}
public function init():void{
//ウィンドウサイズに合わせる
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
//Ball作成
m_oSprite = new Sprite();
m_aBall = new Array();
for (var i:int = 0; i < m_iCount; i++){
var oBall:Ball = new Ball(Math.random() * 10 , Math.random() * 0xffffff);
//randomで初期配置
oBall.x = Math.random() * stage.stageWidth;
oBall.y = Math.random() * stage.stageHeight;
//loop処理用に配列に保持
m_aBall.push(oBall);
oBall.addEventListener(MouseEvent.MOUSE_DOWN, onPress);
m_oSprite.addChild(oBall);
}
addChild(m_oSprite);
//イベントセット
m_oSprite.addEventListener(Event.ENTER_FRAME, onEnterFrame);
stage.addEventListener(MouseEvent.MOUSE_UP, onRelease);
}
public function onEnterFrame(event:Event):void {
var iCount:int; //Target指定用の数値
//バネの動き
for (var i:int = 0; i < m_iCount; i++) {
//跳ね返り
Reflection(m_aBall[i]);
//Dragしていない要素をSpring
iCount = i;
if (!m_aBall[i].drag) {
for (var j:int = 0; j < m_iCount - 1; j++) {
if (iCount == m_iCount - 1) {
//配列番号クリア
iCount = -1;
}
SpringTo(m_aBall[i], m_aBall[iCount+1]);
iCount+=1;
}
}
}
//線描画
graphics.clear();
graphics.lineStyle(1, 0xffffff);
graphics.moveTo(m_aBall[0].x, m_aBall[0].y);
for (var k:int = 1; k < m_iCount; k++) {
graphics.lineTo(m_aBall[k].x, m_aBall[k].y);
}
graphics.lineTo(m_aBall[0].x, m_aBall[0].y);
}
private function onPress(event:MouseEvent):void {
//drag開始
event.target.startDrag();
for (var i:int = 0; i < m_iCount; i++) {
if (event.target == m_aBall[i]) {
m_aBall[i].drag = true;
}
}
}
private function onRelease(event:MouseEvent):void {
//drag終了
for (var i:int = 0; i < m_iCount; i++) {
m_aBall[i].stopDrag();
m_aBall[i].drag = false;
}
}
private function Reflection(oBall:Ball):void {
//壁の座標
m_nRefRight = stage.stageWidth;
m_nRefBottom = stage.stageHeight;
m_nRefTop = 0;
m_nRefLeft = 0;
//横方向
if (oBall.x + oBall.radius > m_nRefRight) {
//境界線ぴったりに移動
oBall.x = m_nRefRight - oBall.radius;
//進行方向を逆にセット
oBall.vx *= m_nBounce
}else if (oBall.x - oBall.radius < m_nRefLeft) {
oBall.x = m_nRefLeft + oBall.radius;
oBall.vx *= m_nBounce
}
//縦方向
if (oBall.y + oBall.radius > m_nRefBottom) {
oBall.y = m_nRefBottom - oBall.radius;
oBall.vy *= m_nBounce
}else if (oBall.y - oBall.radius < m_nRefTop) {
oBall.y = m_nRefTop + oBall.radius;
oBall.vy *= m_nBounce
}
}
private function SpringTo(oBall_a:Ball, oBall_b:Ball):void {
//到達点を求める( oBall_bに対するoBall_aの到達点 )
var nDistansX:Number = oBall_b.x - oBall_a.x;
var nDistansY:Number = oBall_b.y - oBall_a.y;
var nRadian:Number = Math.atan2(nDistansY, nDistansX);
var nTargetX:Number = oBall_b.x - Math.cos(nRadian) * m_nSpringLngth;
var nTargetY:Number = oBall_b.y - Math.sin(nRadian) * m_nSpringLngth;
//バネ
oBall_a.vx += (nTargetX - oBall_a.x) * m_nSpring;
oBall_a.vy += (nTargetY - oBall_a.y) * m_nSpring;
//摩擦
oBall_a.vx *= m_nFriction;
oBall_a.vy *= m_nFriction;
//移動
oBall_a.x += oBall_a.vx + 0.03;
oBall_a.y += oBall_a.vy + 0.03;
}
}
}
import flash.display.Sprite;
import flash.events.Event;
internal class Ball extends Sprite{
//プロパティ
public var vx:Number = 0; //速度X
public var vy:Number = 0; //速度Y
public var radius:Number; //半径
public var color:uint; //32 ビットの符号なし整数（intの 2 倍）
public var drag:Boolean; //Drag flg
//コンストラクタ
public function Ball(nRadius:Number=40,uiColor:uint=0xff0000){
this.radius = nRadius;
this.color = uiColor;
init();
}
public function init():void{
graphics.beginFill(color);
graphics.drawCircle(0,0,radius);
graphics.endFill();
}
}