Snow (2)

////////////////////////////////////////////////////////////////////////////////
// Snow (2)
//
// [AS3.0] ドットの光 (1)
// http://www.project-nya.jp/modules/weblog/details.php?blog_id=1090
////////////////////////////////////////////////////////////////////////////////

by ProjectNya 28 Mar 2011

Embed

/**
 * Copyright ProjectNya ( http://wonderfl.net/user/ProjectNya )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/99Vp
 */

////////////////////////////////////////////////////////////////////////////////
// Snow (2)
//
// [AS3.0] ドットの光 (1)
// http://www.project-nya.jp/modules/weblog/details.php?blog_id=1090
////////////////////////////////////////////////////////////////////////////////

package {

    import flash.display.Sprite;
    import flash.geom.Rectangle;

    [SWF(backgroundColor="#FFFFFF", width="465", height="465", frameRate="30")]

    public class Main extends Sprite {
        private var light:DotLight;
        private var dots:uint = 1;
        private var gravity:Number = 0.02;

        public function Main() {
            //Wonderfl.capture_delay(1);
            init();
        }

        private function init():void {
            graphics.beginFill(0x000000);
            graphics.drawRect(0, 0, 465, 400);
            graphics.endFill();
            //
            light = new DotLight(new Rectangle(0, 0, 465, 400));
            addChild(light);
            light.setup(dots, gravity);
            light.start();
            //
            var slider1:Slider = new Slider();
            slider1.x = 12;
            slider1.y = 402;
            addChild(slider1);
            slider1.init({label: "dots", width: 200, unit: 1, min: 0, max: 50, grid: 10, init: 1});
            slider1.addEventListener(CompoEvent.CHANGE, change1, false, 0, true);
            //
            var slider2:Slider = new Slider();
            slider2.x = 252;
            slider2.y = 402;
            addChild(slider2);
            slider2.init({label: "gravity", width: 200, unit: 0.01, min: 0, max: 1, grid: 10, init: 0.02});
            slider2.addEventListener(CompoEvent.CHANGE, change2, false, 0, true);
        }
        private function change1(evt:CompoEvent):void {
            dots = evt.value;
            light.setup(dots, gravity);
        }
        private function change2(evt:CompoEvent):void {
            gravity = evt.value;
            light.setup(dots, gravity);
        }
        
    }

}


//////////////////////////////////////////////////
// DotLightクラス
//////////////////////////////////////////////////

import flash.display.Sprite;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.PixelSnapping;
import flash.display.BlendMode;
import flash.geom.Matrix;
import flash.geom.Rectangle;
import flash.events.Event;

class DotLight extends Sprite {
    private var rect:Rectangle;
    private var canvas:BitmapData;
    private var sparkle:BitmapData;
    private var scale:uint = 4;
    private var matrix:Matrix;
    private var light:EmitLight;
    private var dots:uint = 10;

    public function DotLight(r:Rectangle) {
        rect = r;
        init();
    }

    private function init():void {
        canvas = new BitmapData(rect.width, rect.height, false, 0xFF000000);
        var cBitmap:Bitmap = new Bitmap(canvas);
        addChild(cBitmap);
        sparkle = new BitmapData(rect.width/scale, rect.height/scale, false, 0xFF000000);
        var sBitmap:Bitmap = new Bitmap(sparkle, PixelSnapping.NEVER, true);
        sBitmap.scaleX = sBitmap.scaleY = scale;
        sBitmap.blendMode = BlendMode.ADD;
        addChild(sBitmap);
        matrix = new Matrix(1/scale, 0, 0, 1/scale, 0, 0);
        light = new EmitLight(canvas);
    }
    public function setup(d:uint, g:Number):void {
        dots = d;
        light.gravity = g;
    }
    public function start():void {
        addEventListener(Event.ENTER_FRAME, draw, false, 0, true);
    }
    public function stop():void {
        removeEventListener(Event.ENTER_FRAME, draw);
    }
    private function draw(evt:Event):void {
        light.create(dots);
        canvas.lock();
        canvas.fillRect(canvas.rect, 0x00000000);
        light.emit();
        canvas.unlock();
        sparkle.lock();
        sparkle.draw(canvas, matrix);
        sparkle.unlock();
    }

}


//////////////////////////////////////////////////
// EmitLightクラス
//////////////////////////////////////////////////

import flash.display.BitmapData;
import flash.geom.Rectangle;

class EmitLight {
    private var canvas:BitmapData;
    private var rect:Rectangle;
    private var dots:Array;
    public var gravity:Number = 0.02;

    public function EmitLight(c:BitmapData) {
        canvas  = c;
        rect = canvas.rect;
        init();
    }

    private function init():void {
        dots = new Array();
    }
    public function create(max:uint):void {
        for (var n:uint = 0; n < max; n++) {
            var px:Number = Math.random()*rect.width;
            var py:Number = 0;
            var power:Number = Math.random() + 0.5;
            var dot:Dot = new Dot(px, py, power);
            dots.push(dot);
        }
    }
    public function emit():void {
        for (var n:uint = 0; n < dots.length; n++) {
            var dot:Dot = dots[n];
            dot.vy += gravity*dot.power;
            dot.vy *= 0.99;
            dot.y += dot.vy;
            canvas.setPixel(dot.x, dot.y, dot.rgb);
            if (dot.y > rect.bottom) {
                dots.splice(n, 1);
                dot = null;
            }
        }
    }

}


//////////////////////////////////////////////////
// Dotクラス
//////////////////////////////////////////////////

class Dot {
    public var x:Number = 0;
    public var y:Number = 0;
    public var vx:Number = 0;
    public var vy:Number = 0;
    public var power:Number = 1;
    public var rgb:uint = 0xFFFFFF;

    public function Dot(_x:Number, _y:Number, p:Number):void {
        x = _x;
        y = _y;
        power = p;
    }

}


//////////////////////////////////////////////////
// Sliderクラス
//////////////////////////////////////////////////

import flash.display.Sprite;
import flash.display.Shape;
import flash.text.TextField;
import flash.text.TextFieldType;
import flash.text.AntiAliasType;
import flash.text.TextFieldAutoSize;
import flash.text.TextFormat;
import flash.text.TextFormatAlign;
import flash.filters.DropShadowFilter;
import flash.filters.GlowFilter;
import flash.geom.Rectangle;
import flash.geom.Matrix;
import flash.display.GradientType;
import flash.display.SpreadMethod;
import flash.display.InterpolationMethod;
import flash.events.Event;
import flash.events.MouseEvent;

class Slider extends Sprite {
    private var hole:Shape;
    private var line:Sprite;
    private var thumb:Sprite;
    private var light:Shape;
    private var shade:Shape;
    private var base:Shape;
    private var title:TextField;
    private var txt:TextField;
    private var label:String = "";
    private static var fontType:String = "_ゴシック";
    private var _width:uint = 100;
    private static var tHeight:uint = 20;
    private static var bHeight:uint = 35;
    private var grid:uint = 5;
    private static var bColor:uint = 0xFFFFFF;
    private static var tColor:uint = 0x666666;
    private static var gColor:uint = 0x999999;
    private static var mColor:uint = 0x333333;
    private static var bgColor:uint = 0x0099FF;
    private static var sColor:uint = 0x000000;
    private static var offColor:uint = 0x999999;
    private var unit:Number = 0.1;
    private var digit:int;
    private var min:Number = 0;
    private var max:Number = 100;
    private var initValue:Number = 0;
    private var blueGlow:GlowFilter;
    private var shadeDrop:DropShadowFilter;
    private var value:Number;
    private var _enabled:Boolean = true;

    public function Slider() {
    }

    public function init(option:Object):void {
        if (option.label != undefined) label = option.label;
        if (option.width != undefined) _width = option.width;
        if (option.unit != undefined) unit = option.unit;
        if (option.min != undefined) min = option.min;
        if (option.max != undefined) max = option.max;
        if (option.grid != undefined) grid = option.grid;
        if (option.init != undefined) initValue = option.init;
        digit = - Math.floor(Math.log(unit)*Math.LOG10E);
        draw();
    }
    private function draw():void {
        shadeDrop = new DropShadowFilter(1, 90, sColor, 0.5, 4, 4, 2, 3, false, false);
        blueGlow = new GlowFilter(bgColor, 0.6, 5, 5, 2, 3, false, true);
        hole = new Shape();
        line = new Sprite();
        title = new TextField();
        txt = new TextField();
        thumb = new Sprite();
        shade = new Shape();
        light = new Shape();
        base = new Shape();
        addChild(hole);
        addChild(line);
        addChild(title);
        addChild(txt);
        addChild(thumb);
        thumb.addChild(shade);
        thumb.addChild(light);
        thumb.addChild(base);
        hole.y = bHeight;
        createGradientHole(hole, _width, 3);
        line.y = bHeight;
        createGrid(line);
        title.height = tHeight-1;
        title.type = TextFieldType.DYNAMIC;
        title.selectable = false;
        //title.embedFonts = true;
        //title.antiAliasType = AntiAliasType.ADVANCED;
        title.textColor = tColor;
        title.autoSize = TextFieldAutoSize.LEFT;
        var tfl:TextFormat = new TextFormat();
        tfl.font = fontType;
        tfl.size = 12;
        tfl.align = TextFormatAlign.LEFT;
        title.defaultTextFormat = tfl;
        title.text = label;
        txt.x = 50;
        txt.width = 50;
        txt.height = tHeight-1;
        txt.selectable = false;
        //txt.embedFonts = true;
        //txt.antiAliasType = AntiAliasType.ADVANCED;
        var tfr:TextFormat = new TextFormat();
        tfr.font = fontType;
        tfr.size = 12;
        tfr.align = TextFormatAlign.RIGHT;
        txt.defaultTextFormat = tfr;
        reset();
        thumb.y = bHeight;
        createThumb(shade, 8, 20, 12, sColor);
        shade.filters = [shadeDrop];
        createThumb(light, 8, 20, 12, bgColor);
        light.filters = [blueGlow];
        createThumb(base, 8, 20, 12, bColor);
        _up();
        enabled = true;
        thumb.mouseChildren = false;
    }
    private function rollOver(evt:MouseEvent):void {
        _over();
    }
    private function rollOut(evt:MouseEvent):void {
        _up();
    }
    private function press(evt:MouseEvent):void {
        _down();
        var rect:Rectangle = new Rectangle(0, bHeight, _width, 0);
        thumb.startDrag(false, rect);
        thumb.addEventListener(MouseEvent.MOUSE_UP, release, false, 0, true);
        stage.addEventListener(MouseEvent.MOUSE_UP, release, false, 0, true);
        stage.addEventListener(Event.MOUSE_LEAVE, leave, false, 0, true);
        thumb.addEventListener(Event.ENTER_FRAME, change, false, 0, true);
    }
    private function release(evt:MouseEvent):void {
        _up();
        thumb.stopDrag();
        checkValue();
        var e:CompoEvent = new CompoEvent(CompoEvent.SELECT, value);
        dispatchEvent(e);
        thumb.removeEventListener(MouseEvent.MOUSE_UP, release);
        stage.removeEventListener(MouseEvent.MOUSE_UP, release);
        stage.removeEventListener(Event.MOUSE_LEAVE, leave);
        thumb.removeEventListener(Event.ENTER_FRAME, change);
    }
    private function leave(evt:Event):void {
        _up();
        thumb.stopDrag();
        checkValue();
        var e:CompoEvent = new CompoEvent(CompoEvent.SELECT, value);
        dispatchEvent(e);
        thumb.removeEventListener(MouseEvent.MOUSE_UP, release);
        stage.removeEventListener(MouseEvent.MOUSE_UP, release);
        stage.removeEventListener(Event.MOUSE_LEAVE, leave);
        thumb.removeEventListener(Event.ENTER_FRAME, change);
    }
    private function _up():void {
        light.visible = false;
    }
    private function _over():void {
        light.visible = true;
    }
    private function _down():void {
        light.visible = true;
    }
    private function _off():void {
        light.visible = false;
        txt.textColor = offColor;
    }
    private function change(evt:Event):void {
        _down();
        checkValue();
        var e:CompoEvent = new CompoEvent(CompoEvent.CHANGE, text);
        dispatchEvent(e);
    }
    private function checkValue():void {
        value = min + thumb.x/_width*(max-min);
        text = value;
    }
    public function get enabled():Boolean {
        return _enabled;
    }
    public function set enabled(param:Boolean):void {
        _enabled = param;
        if (!_enabled) _off();
        thumb.buttonMode = _enabled;
        thumb.mouseEnabled = _enabled;
        thumb.useHandCursor = _enabled;
        if (_enabled) {
            thumb.addEventListener(MouseEvent.MOUSE_OVER, rollOver, false, 0, true);
            thumb.addEventListener(MouseEvent.MOUSE_OUT, rollOut, false, 0, true);
            thumb.addEventListener(MouseEvent.MOUSE_DOWN, press, false, 0, true);
            thumb.addEventListener(MouseEvent.MOUSE_UP, release, false, 0, true);
        } else {
            thumb.removeEventListener(MouseEvent.MOUSE_OVER, rollOver);
            thumb.removeEventListener(MouseEvent.MOUSE_OUT, rollOut);
            thumb.removeEventListener(MouseEvent.MOUSE_DOWN, press);
            thumb.removeEventListener(MouseEvent.MOUSE_UP, release);
        }
    }
    public function reset():void {
        thumb.x = _width*(initValue-min)/(max-min);
        value = initValue;
        text = value;
    }
    public function get text():Number {
        return Number(txt.text);
    }
    public function set text(param:Number):void {
        value = param;
        txt.text = Number(value.toFixed(digit)).toFixed(digit);
    }
    private function createGrid(target:Sprite):void {
        for (var n:uint = 0; n <= grid; n++) {
            var w:Number = _width/grid;
            if (n == 0 || n == grid*0.5 || n == grid) {
                createGridLine(target, w*n, mColor);
                var _txt:TextField = new TextField();
                target.addChild(_txt);
                _txt.x = w*n - 20;
                _txt.y = 13;
                _txt.width = 40;
                _txt.height = 14;
                _txt.selectable = false;
                //_txt.embedFonts = true;
                //_txt.antiAliasType = AntiAliasType.ADVANCED;
                _txt.textColor = mColor;
                var tfc:TextFormat = new TextFormat();
                tfc.font = fontType;
                tfc.size = 9;
                tfc.align = TextFormatAlign.CENTER;
                _txt.defaultTextFormat = tfc;
                if (n == 0) _txt.text = String(min);
                if (n == grid*0.5) _txt.text = String(min+(max-min)*0.5);
                if (n == grid) _txt.text = String(max);
            } else {
                createGridLine(target, w*n, gColor);
            }
        }
    }
    private function createThumb(target:Shape, w:uint, h:uint, y:uint, color:uint, alpha:Number = 1):void {
        target.graphics.beginFill(color, alpha);
        target.graphics.drawRoundRect(-w*0.5, -y, w, h, w);
        target.graphics.endFill();
    }
    private function createGradientHole(target:Shape, w:uint, c:Number):void {
        var colors:Array = [0x000000, 0x000000];
        var alphas:Array = [0.4, 0];
        var ratios:Array = [0, 255];
        var matrix:Matrix = new Matrix();
        matrix.createGradientBox(w+c*2, c*2, 0.5*Math.PI, -c, -c);
        target.graphics.beginGradientFill(GradientType.LINEAR, colors, alphas, ratios, matrix, SpreadMethod.PAD, InterpolationMethod.RGB, 0);
        target.graphics.drawRoundRect(-c, -c, w+c*2, c*2, c*2);
        target.graphics.endFill();
    }
    private function createGridLine(target:Sprite, x:uint, color:uint):void {
        target.graphics.lineStyle(0, color);
        target.graphics.moveTo(x, 8);
        target.graphics.lineTo(x, 12);
    }

}


//////////////////////////////////////////////////
// CompoEventクラス
//////////////////////////////////////////////////

import flash.events.Event;

class CompoEvent extends Event {
    public static const SELECT:String = "select";
    public static const CHANGE:String = "change";
    public var value:*;

    public function CompoEvent(type:String, value:*) {
        super(type);
        this.value = value;
    }

    public override function clone():Event {
        return new CompoEvent(type, value);
    }

}