// forked from enok's 線カラー forked from: 線
// http://linkalink.jp/enok/

package {

import flash.display.Sprite;

[SWF(backgroundColor="0xffffff", frameRate="24")]

public class Nami extends Sprite {  
      public function Nami() { 
                //背景 
                var bg_color:Number = 0xffffff; 
                var background:Sprite = new Sprite(); 
                background.graphics.beginFill(bg_color); 
                background.graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight); 
                addChild(background);

var _trick:Sprite = new Sen(this, 15, 0x0, false); 
        addChild( _trick ); 
		_trick = new Sen(this, 15, 0xFF3300, false); 
        addChild( _trick ); 
		_trick = new Sen(this, 15, 0x0, false); 
        addChild( _trick );

}

import flash.display.DisplayObjectContainer; 
import flash.display.Sprite; 
import flash.events.Event; 
import flash.events.MouseEvent; 
import flash.events.TimerEvent; 
import flash.filters.BlurFilter; 
import flash.filters.BitmapFilterQuality; 
import flash.geom.Point; 
import flash.utils.Timer; 
import flash.display.CapsStyle;

class Sen extends Sprite { 
    //ワールド系 
    private var _s:DisplayObjectContainer; 
    private var _w:int; 
    private var _h:int; 
    private var _center_x:Number; 
    private var _center_y:Number; 
    private var _line_sp:Sprite = new Sprite(); 
    private var _light_sp:Sprite = new Sprite(); 
     
    //光系 
    private var _light:Sprite = new Sprite(); 
    private var _light_list:Array = new Array(); 
    private var _light_num:int = 50; 
    private var _light_flg:Boolean = false; 
     
    //ポイント系 
    private var _point:ekPoint; 
    private var _point_list:Array = new Array(); 
    private var _point_size:Number = 1.0; 
    private var _point_head:ekPoint; 
     
    //設定系 
    private var _rand_rate:Number; 
    private var _friction:Number = 0.8 //跳ね 
    private var _gravity_x:Number = 10.0; //重力 
    private var _gravity_y:Number =  10.0; //重力 
    private var _gravity_xvec:Number = 1; //重力方向 
    private var _gravity_yvec:Number = 1; //重力方向 
    private var _spring:Number = 0.003; //ばね 
    private var _line_radius:Number = 30.0; //線の太さ 
    private var _line_alpha:Number = 1.0; //線のアルファ 
    private var _line_color:Number; //線の色 
    private var _point_num:int = 50; //ポイント数

//その他 
    private var update_ctn:Number = 0; 
                                                 
    public function Sen( p_s:DisplayObjectContainer, p_rand_rate:Number = 5.0, p_line_color:Number = 0x000000, p_light_flg:Boolean = false ) { 
        //WORLD系 
        _s = p_s; 
        _w = _s.stage.stageWidth; _h = _s.stage.stageHeight;  
        _center_x = _w / 2; _center_y = _h / 2; 
        _rand_rate = p_rand_rate; 
        _line_color = p_line_color; 
        _light_flg = p_light_flg; 
         
        init(); 
    } 
     
    private function init():void {             
        //光のセット 
        if(_light_flg){ setLight(); } 
         
        //ポイントの先頭 
        _point_head = new ekPoint(_w, _center_y); 
         
        //配置 
        addChild(_light_sp); 
        addChild(_line_sp); 
         
        var timer:Timer = new Timer(50, 0);  
          timer.addEventListener(TimerEvent.TIMER, createPoint);  
          timer.start();  
         
        addEventListener( Event.ENTER_FRAME, update ); 
        addEventListener( MouseEvent.MOUSE_MOVE, mouseMove ); 
        addEventListener( Event.REMOVED, remove ); 
        _s.stage.addEventListener( Event.RESIZE, resize ); 
    } 
     
    private function remove(e:Event):void { 
        removeEventListener( Event.ENTER_FRAME, update ); 
        _s.stage.removeEventListener( Event.RESIZE, remove ); 
        removeEventListener( Event.REMOVED, resize ); 
    } 
     
    private function resize( e:Event ):void { 
        _w = _s.stage.stageWidth; 
        _h = _s.stage.stageHeight; 
        _center_x = _w / 2; 
        _center_y = _h / 2; 
    } 
     
    private function setLight():void { 
        var i:int; 
        var blur_sp:Sprite = new Sprite(); 
        var blur:BlurFilter, filters:Array, blur_size:Number; 
        var radius_rate:Number = 3.0; 
         
        for ( i = 0; i < _light_num; i++) { 
            var light:Sprite = new Sprite(); 
            light.x = -i * radius_rate * 2; 
            light.y = -i * radius_rate * 2; 
             
            light.graphics.clear(); 
            light.graphics.beginFill(0xffffff, 1.0); 
            light.graphics.drawCircle( 0, 0, i * radius_rate); 
            light.graphics.endFill(); 
             
            blur_size = 20; 
            blur = new BlurFilter( blur_size , blur_size, BitmapFilterQuality.HIGH ); 
            filters = [blur]; 
            light.filters = filters; 
             
             
            _light_list.push(light); 
             
            _light_sp.addChild(light); 
        } 
             
    } 
     
    private function createPoint(e:TimerEvent):void {         
        var i:Number; 
         
        _point = new ekPoint(_point_head.x, _point_head.y); 
        _point._vx = ( Math.random()) * _rand_rate; 
        _point._vy = ( Math.random()) * _rand_rate; 
        _point_list.push(_point); 
         
        for (i = 0; i < _point_list.length; i++){ 
            if ( _point_list.length > _point_num ) { 
                _point = _point_list.shift(); 
                 
                break; 
            } 
        } 
         
    } 
     
    private function mouseMove(e:MouseEvent):void { 
        e.updateAfterEvent () ; 
    } 
     
    private function update(e:Event):void { 
        setPointHead(); 
        drawLine(); 
        move(); 
        follow(); 
         
        update_ctn++; 
    } 
     
    private function setPointHead():void { 
        var vx:Number = ( _s.stage.mouseX - _point_head.x ) / 10; 
        var vy:Number = ( _s.stage.mouseY - _point_head.y ) / 10; 
        _point_head.x += vx; 
        _point_head.y += vy; 
    } 
     
    private function drawLine():void { 
        _line_sp.graphics.clear(); 
         
        if (_point_list.length >= 3) { 
            var i:Number; 
            var length_last:int = _point_list.length - 1; 
             
            _line_sp.graphics.moveTo(_point_list[length_last].x, _point_list[length_last].y); 
             
            var angle:Number = 0.0; 
            //_point_list.reverse(); 
            for (i = length_last - 1; i >= 2; i-- ) { 
                 
                _point_size = Math.sin( angle ) * _line_radius; 
                 
                _line_sp.graphics.lineStyle(_point_size, _line_color, _line_alpha ,true, "normal", CapsStyle.ROUND);  
                _line_sp.graphics.curveTo( _point_list[i].x, 
                                  _point_list[i].y, 
                                  (_point_list[i].x + _point_list[i - 1].x) / 2, 
                                  (_point_list[i].y + _point_list[i - 1].y) / 2); 
                 
                angle = angle + 0.1; 
            } 
            _line_sp.graphics.curveTo( _point_list[1].x,  
                              _point_list[1].y, 
                              _point_list[0].x,  
                              _point_list[0].y);

_point_size++; 
        } 
         
    } 
     
    private function moveLight(p_i:Number, p_point:ekPoint):void { 
        _light_list[p_i].x = p_point.x; 
        _light_list[p_i].y = p_point.y; 
    } 
     
    private function follow():void { 
        var i:Number; 
        var dy:Number, ay:Number; 
         
        for (i = _point_list.length - 1; i > 0; i-- ) {         
            dy = _point_list[i].y - _point_list[i - 1].y; 
            ay = dy * _spring; 
            _point_list[i]._vy += ay; 
             
        } 
         
         
    } 
     
    private function move():void { 
        var i:Number; 
        var mx_vec:Number = 0; 
        var mousex:Number = _s.stage.mouseX; 
        var mousey:Number = _s.stage.mouseY; 
         
        var x_rate:Number = Math.abs(mousex - _center_x) / _center_x; 
        var y_rate:Number = Math.abs(mousey - _center_y) / _center_y; 
         
        for (i = 0; i < _point_list.length; i++ ) { 
             
            if ( mousex < _center_x) { 
                _gravity_xvec = 1; 
            }else { 
                _gravity_xvec = -1; 
            } 
             
            if (_s.stage.mouseY < _center_y) { 
                _gravity_yvec = 1; 
            }else { 
                _gravity_yvec = -1; 
            } 
             
            _point_list[i]._vx += _gravity_x * x_rate * _gravity_xvec; 
            _point_list[i]._vx *= _friction; 
            _point_list[i]._vy += _gravity_y * y_rate * _gravity_yvec; 
            _point_list[i]._vy *= _friction; 
             
            _point_list[i].x += _point_list[i]._vx; 
            _point_list[i].y += _point_list[i]._vy; 
             
            if(_light_flg){ moveLight(i, _point_list[i]); } 
        } 
         
         
         
    } 
     
}

import flash.display.Sprite;

class ekPoint extends Sprite { 
    public var _vx:Number = 0; 
    public var _vy:Number = 0; 
    public var _radius:Number = 0; 
     
    public function ekPoint( p_x:Number, p_y:Number, p_radius:Number = 3 ) { 
        x = p_x; 
        y = p_y; 
        _radius = p_radius; 
         
        init(); 
    } 
     
    public function init():void { 
        var point_radius:Number = _radius; 
        graphics.beginFill( 0x000000 , 1.0 ); 
        graphics.drawCircle( point_radius / 2, point_radius / 2, point_radius); 
        graphics.endFill();     
    } 
     
    public function changeRadius( p_radius:Number ):void { 
        graphics.clear(); 
        graphics.beginFill( 0x000000 , 1.0 ); 
        graphics.drawCircle( p_radius / 2, p_radius / 2, p_radius); 
        graphics.endFill();     
    } 
     
}

forked from: 線カラー forked from: 線