flash on 2009-7-16

参考文献「ActionScript3.0 アニメーション」Keith Peters 永井 勝則

by tmn 16 Jul 2009

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gainer physical
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/**
 * Copyright tmn ( http://wonderfl.net/user/tmn )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/9woD
 */

//参考文献「ActionScript3.0 アニメーション」Keith Peters 永井 勝則

package{
	import flash.display.Sprite;
	import flash.display.StageAlign;
	import flash.display.StageScaleMode;
	import flash.events.Event;
	import flash.events.MouseEvent;
	
	import funnel.*;
	
	[SWF(backgroundColor="0xFFFFFF", frameRate="30")]
	public class ballballball extends Sprite{
		private var ball:Ball;
		private var ball1:Ball;
		private var vx:Number;
		private var vy:Number;
		private var spring:Number = 0.05;
		private var gravity:Number = .5;
		private var oldX:Number;
		private var oldY:Number;
		
        private var gio:Gainer;
        private var flasher0:Osc;
        private var flasher1:Osc;
        
        private var balls:Array;
        private var numBalls:Number = 10;
		
		public function ballballball(){
			init();
		}
		
		private function init():void{
			stage.scaleMode = StageScaleMode.NO_SCALE;
			stage.align = StageAlign.TOP_LEFT;
			
			balls = new Array();
			for(var i:uint = 0; i < numBalls; i++){
				var ball:Ball = new Ball(Math.random() * 30 + 20, Math.random() * 0xFFFFFF);
				ball.x = Math.random() * stage.stageWidth;
				ball.y = Math.random() * stage.stageHeight;
				ball.vx = Math.random() * 6 - 3;
				ball.vy = Math.random() * 6 - 3;
				addChild(ball);
				ball.addEventListener(MouseEvent.MOUSE_DOWN, onMousedown);
				balls.push(ball);
			}
			addEventListener(Event.ENTER_FRAME, onEnterframe);

            gio = new Gainer();
            
            flasher0 = new Osc(Osc.IMPULSE, 1, 1, 0, 0, 1);
            gio.digitalOutput(0).filters = [flasher0];
            
            flasher1 = new Osc(Osc.IMPULSE,1, 1, 0, 0, 1);
            gio.digitalOutput(1).filters = [flasher1];
			
		}
		
		private function onEnterframe(event:Event):void{
			var left:Number = 0;
			var right:Number = stage.stageWidth;
			var top:Number = 0;
			var bottom:Number = stage.stageHeight;
			
			for(var i:uint = 0; i < numBalls - 1; i++){
				var ball0:Ball = balls[ i ];
				
				for(var j:uint = 0; j < numBalls; j++){
					var ball1:Ball = balls[ j ];
					var dx:Number = ball1.x - ball0.x;
					var dy:Number = ball1.y - ball0.y;
					var dist:Number = Math.sqrt(dx * dx + dy * dy);
					var minDist:Number = ball0.radius + ball1.radius;
					
					if(dist < minDist){
						var angle:Number = Math.atan2(dy, dx);
						var tx:Number = ball0.x + Math.cos(angle) * minDist;
						var ty:Number = ball0.y + Math.sin(angle) * minDist;
						var ax:Number = (tx - ball1.x) * spring;
						var ay:Number = (ty - ball1.y) * spring;
						ball0.vx -= ax;
						ball0.vy -= ay;
						ball1.vx += ax;
						ball1.vy += ay;
					}
					
				}
				
			}
			
			for(i = 0; i < numBalls; i++){
				var ball:Ball = balls[ i ];
				move(ball);
			}
		}
		
		private function move(ball:Ball):void{
			ball.y += ball.vy;
			
			if(ball.x + ball.radius > stage.stageWidth){
				ball.x = stage.stageWidth - ball.radius;
				ball.vx *= -1;
			} else if(ball.x - ball.radius < 0){
				ball.x = ball.radius;
				ball.vx *= -1;
			}
			
			if(ball.y + ball.radius > stage.stageHeight){
				ball.y = stage.stageHeight - ball.radius;
				ball.vy *= -1;
				flasher0.reset();
				flasher0.start();
				gio.digitalOutput(0).value = 1;
			} else if (ball.y - ball.radius < 0){
				ball.y = ball.radius;
				ball.vy *= -1;
				flasher1.reset();
				flasher1.start();
				gio.digitalOutput(1).value = 1;
			}
		}
		
		private function onMousedown(event:MouseEvent):void{
			for(var i:uint = 0; i < balls.length; i++){
				if(balls[i] == Ball(event.target)){
					oldX = Ball(event.target).x;
					oldY = Ball(event.target).y;
					stage.addEventListener(MouseEvent.MOUSE_UP, onMouseup);
					Ball(event.target).startDrag();
					removeEventListener(Event.ENTER_FRAME, onEnterframe);
					addEventListener(Event.ENTER_FRAME, trackVelocity);
				}
			}
			for(var n:Number = 0; n < 4; n++){
				gio.digitalOutput(n).value = 0;
			}
		}
		
		//ボールを離した時、enterFrameハンドラを入れ替え、trackVelocityを削除し、onEnterFrameを追加
		private function onMouseup(event:MouseEvent):void{
			for(var i:uint = 0; i < balls.length; i++){
				if(balls[i] == Ball(event.target)){
					stage.removeEventListener(MouseEvent.MOUSE_UP, onMouseup);
					Ball(event.target).stopDrag();
					removeEventListener(Event.ENTER_FRAME, trackVelocity);
					addEventListener(Event.ENTER_FRAME, onEnterframe);
				}
			}
		}
		
		//ボールの現在のx, y位置からそれぞれoldX,oldYを引き=現在の速度が分かる → その値をvx, vyに保持　oldX, oldYをボールの現在位置に再設定
		private function trackVelocity(event:Event):void{
			for(var i:uint = 0; i < balls.length; i++){
				if(balls[i] == event.target){
					vx = Ball(event.target).x - oldX;
					vy = Ball(event.target).y - oldY;
					oldX = Ball(event.target).x;
					oldY = Ball(event.target).y;
				}
			}
		}
	}
}

import flash.display.Sprite;
	
class Ball extends Sprite{
	public var radius:Number;
	public var color:uint;
	public var vx:Number = 0;
	public var vy:Number = 0;
		
	public function Ball(radius:Number = 10, color:uint = 0xFFFFFF){
		this.radius = radius;
		this.color =  color;
		init();
	}
		
	public function init():void{
			graphics.beginFill(color);
			graphics.drawCircle(0, 0, radius);
			graphics.endFill();
	}
}