forked from: flash on 2009-7-8

/**
 * Copyright jmbyh521 ( http://wonderfl.net/user/jmbyh521 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/aRiT
 */

// forked from set0's flash on 2009-7-8
package  
{
    import flash.display.*;
    import flash.events.*;
    import flash.filters.*;
    import flash.geom.*;
    
    [SWF(width=465, height=465, frameRate=60, backgroundColor=0xffffff)]
    public class FlashTest27 extends Sprite
    {
        private const MAX_SPARK:int = 20;
        private const CIRCLE_D:Number = 360 / MAX_SPARK;
        private const CENTER_X:Number = 30;
        private const CENTER_Y:Number = 30;
        private const COLOR_TRANSFORM:ColorTransform = new ColorTransform(1.2, 1.2, 1.2, 1.0);
        private const BLUR_FILTER:BlurFilter = new BlurFilter(2, 2);
        private const DEST_POINT:Point = new Point(0, 0);
        private const BUFFER_RECT:Rectangle = new Rectangle(0, 0, 465, 465);

        private var spark_list:Array = [];
        private var line_list:Array = [];
        private var buffer:BitmapData = new BitmapData(465, 465, false, 0xffffff);
        private var screen:Bitmap = new Bitmap(buffer);
        private var old_x_list:Array = [];
        private var old_y_list:Array = [];
        private var count:int = 0;

        public function FlashTest27()
        {
            var init_x:Number = -100;
            var init_y:Number = -100;
            
            for (var i:int = 0; i < MAX_SPARK; i++) {
                spark_list.push(new Spark(init_x, init_y, CIRCLE_D));
                old_x_list[i] = 0;
                old_y_list[i] = 0;
            }
            
            addChild(screen);
            stage.addEventListener(MouseEvent.MOUSE_DOWN, init);
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
        }
        
        private function init(e:Event):void
        {
            for (var i:int = 0; i < MAX_SPARK; i++) {
                spark_list[i].flag = 1;
            }
        }
        
        private function onEnterFrame(e:Event):void
        {
            var shape:Shape = new Shape();
            var max:int = spark_list.length;
            var target:int;
            
            buffer.lock();
            buffer.applyFilter(buffer, BUFFER_RECT, DEST_POINT, BLUR_FILTER);
            buffer.colorTransform(BUFFER_RECT, COLOR_TRANSFORM);
            
            for (var i:int = 0; i < max; i++) {
                spark_list[i].move(stage.mouseX, stage.mouseY, i, count);
            }
                        
            for (i = 0; i < MAX_SPARK; i++) {
                line_list.push(new Line(old_x_list[i], old_y_list[i], spark_list[i].x + CENTER_X, spark_list[i].y + CENTER_Y));
                old_x_list[i] = spark_list[i].x + CENTER_X;
                old_y_list[i] = spark_list[i].y + CENTER_Y;
            }
            
            max = line_list.length;
            for (i = 0; i < max; i++) {
                if (line_list[i].move() === false) {
                    line_list.splice(i, 1);
                    i--;
                    max--;
                    continue;
                }

                shape.graphics.lineStyle(8, 0x330000, 1, false, "normal", CapsStyle.ROUND);
                shape.graphics.moveTo(line_list[i].from_x, line_list[i].from_y);
                shape.graphics.lineTo(line_list[i].to_x , line_list[i].to_y);
                
                shape.graphics.lineStyle(1, 0x660000);
                shape.graphics.moveTo(line_list[i].from_x - 3, line_list[i].from_y - 3);
                shape.graphics.lineTo(line_list[i].to_x - 3, line_list[i].to_y - 3);
                shape.filters = [BLUR_FILTER];
            }

            count++;
            
            if (count >= 360) {
                count = 0;
            }
            buffer.draw(shape);
            buffer.unlock();
        }
    }
}

import flash.display.*;
import flash.geom.*;
import flash.filters.*;

const G:Number = 9.8;
const DT:Number = 0.1;
const MAX_T:Number = 18;
const T_RAD:Number = Math.PI / 180;
const BLUR_FILTER:BlurFilter = new BlurFilter(2, 2);

class Spark
{
    public var x:Number;
    public var y:Number;
    public var tmp_x:Number;
    public var tmp_y:Number;
    public var init_x:Number;
    public var init_y:Number;
    public var d:Number;
    public var flag:uint = 0;
    public var x0:Number;
    public var y0:Number;
    public var vx0:Number;
    public var vy0:Number;
    public var t:Number;
    public var tmp_target_x:Number;
    public var tmp_target_y:Number;
        
    public function Spark(x:int, y:int, d:Number)
    {
        this.d = d;
        this.x = x;
        this.y = y;
        this.tmp_x = x;
        this.tmp_y = y;
        this.init_x = x;
        this.init_y = y;
    }
    
    public function move(x:Number, y:Number, i:int, count:int):Boolean
    {
        var target_x:Number;
        var target_y:Number;
        
        if(this.flag == 0) {
            target_x = x + Math.random() * 80 * (Math.round(Math.random()) * 2 - 1);
            target_y = y + Math.random() * 80 * (Math.round(Math.random()) * 2 - 1);
            
            this.tmp_x += (Math.cos((this.d * i + count * 5) * T_RAD) * 25 + target_x - 30 - this.x) / 100;
            this.tmp_y += (Math.sin((this.d * i + count * 5) * T_RAD) * 25 + target_y - 30 - this.y) / 100;
            this.tmp_x *= 0.92;
            this.tmp_y *= 0.92;
       
            this.x += this.tmp_x;
            this.y += this.tmp_y;
        
        } else if(this.flag == 1) {
            target_x = -500;
            target_y = -500;
            
            this.x0 = this.x;
            this.y0 = this.y;
            this.vx0 = Math.random() * 10 * (Math.round(Math.random()) * 2 - 1);
            this.vy0 = 0;
            this.t = 0;
            this.tmp_target_x = this.vx0 * MAX_T + this.x0;
            this.tmp_target_y = this.vy0 * MAX_T + 0.5 * G * MAX_T * MAX_T + this.y0
            
            this.flag = 2;
        } else {
            target_x = this.tmp_target_x;
            target_y = this.tmp_target_y;
            
            this.t += DT;
            this.x = this.vx0 * this.t + this.x0;
            this.y = this.vy0 * this.t + 0.5 * G * this.t * this.t + this.y0;
        }
        
        if (target_x >= this.x - 50 && target_x <= this.x + 50 && target_y >= this.y - 50 && target_y <= this.y + 50) {
            this.flag = 0;
            this.t = 0;
        }
    
        return true;
    }
}

class Line
{
    public var life:Number = 40;
    public var from_x:Number;
    public var from_y:Number;
    public var to_x:Number;
    public var to_y:Number;

    public function Line(old_x:Number, old_y:Number, x:Number, y:Number)
    {
        this.from_x = x;
        this.from_y = y;
        this.to_x = old_x;
        this.to_y = old_y;
    }
    
    public function move():Boolean
    {
        this.life--;
        
        if (this.life <= 0) {
            return false;
        }
        
        return true;
    }
}