forked from: sample 8

by albatrus_jp 17 Jan 2010

Embed

/**
 * Copyright albatrus_jp ( http://wonderfl.net/user/albatrus_jp )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/fq0g
 */

// forked from soundkitchen's sample 8
package
{
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.text.TextFormat;
    import caurina.transitions.Tweener;
    import caurina.transitions.properties.CurveModifiers;
    import frocessing.color.ColorHSV;

    [SWF(width=465, height=465, frameRate=30, backgroundColor=0xFFFFFF)]

    public class Sample extends Sprite
    {
        private var _isMouseDown:Boolean = false;
        private var _hsv:ColorHSV;
        private var _txt:TextField;

        public function Sample()
        {
            //  CurveModifiers を有効化
            CurveModifiers.init();

            //  ColorHSV を色相 0 で作成
            _hsv = new ColorHSV(0, 1, 1, 1);

            _txt = new TextField();
            _txt.defaultTextFormat = new TextFormat("Verdana", 48);
            _txt.autoSize = TextFieldAutoSize.LEFT;

            stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
            stage.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
            stage.addEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
        }

        private function enterFrameHandler(evt:Event):void
        {
            //  色を更新
            _hsv.h = ++_hsv.h % 360;

            //  マウスダウンされていなければ処理しない
            if (!_isMouseDown) return;

            //  新しい文字と色を指定
            _txt.text = String.fromCharCode(getCharCode());
            _txt.textColor = _hsv.value;

            //  文字をビットマップ化
            var bmd:BitmapData = new BitmapData(_txt.width, _txt.height, true, 0);
            bmd.draw(_txt);

            var bm:Bitmap = new Bitmap(bmd, "auto", true);
            bm.x -= bm.width / 2;
            bm.y -= bm.height / 2;

            //  Sprite でくるむ 
            var sp:Sprite = new Sprite();
            sp.addChild(bm);
            sp.x = mouseX;
            sp.y = mouseY;

            addChild(sp);

            var endX:Number = Math.random() * stage.stageWidth;
            var ctlX:Number = mouseX + (endX - mouseX) / 2;

            Tweener.addTween(sp, {
                x: endX,
                y: stage.stageHeight,
                rotation: Math.random() * 360,
                alpha: 0,
                _bezier: [{x: ctlX, y: 0}],
                time: 1,
                transition: "linear",
                onComplete: onTweenComplete,
                onCompleteParams: [sp]
            });
        }

        private function getCharCode():int
        {
            var ret:int = 0;

            //  ランダムで振り分け
            //  @see    http://ja.wikipedia.org/wiki/ASCII
            switch (int(Math.random() * 3))
            {
                case 0:
                    //  0-9
                    ret = int(48 + Math.random() * 10);
                    break;

                case 1:
                    //  A-Z
                    ret = int(65 + Math.random() * 26);
                    break;

                case 2:
                    //  a-z
                    ret = int(97 + Math.random() * 26);
                    break;

                default:
                    ret = 48;
            }
            return ret;
        }

        private function onTweenComplete(sp:Sprite):void
        {
            removeChild(sp);
        }

        private function mouseDownHandler(evt:MouseEvent):void
        {
            _isMouseDown = true;
        }

        private function mouseUpHandler(evt:MouseEvent):void
        {
            _isMouseDown = false;
        }
    }
}