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package tools { import
flash.display.DisplayObject; import
flash.events.TimerEvent; import
flash.utils.Timer; public
class Earthquake { /** * 参数 */ private
var _timer:Timer; private
var _displayObject:DisplayObject; private
var _originalX:int; private
var _originalY:int; private
var _intensity:int; private
var _intensityOffset:int; /** * 时间 */ private
var _seconds:Number; /** * 方向 */ public
static const LEFT_RIGHT_UP_DOWN:int
= 0; public
static const LEFT_RIGHT:int
= 1; public
static const UP_DOWN:int
= 2; /** * 帧频 */ public
static const FRAME_RATE:int
= 60; /** * 方向 */ private
var _direction:int; /** * 震动中 */ private
var _bShaking:Boolean
= false; /** * 是否自动销毁 */ private
var _bDestroy:Boolean
= false; /** * 对一个显示对象应用地震效果。 * @param displayObject 抖动对象 * @param intensity 强度 * @param seconds 持续时间 秒 * @param direction 方向 * @param autoDestroy 自动销毁 */ public
function Earthquake(displayObject:DisplayObject, intensity:Number
= 10, seconds:Number
= 1, direction:int
= 0, autoDestroy:Boolean
= false):void { _displayObject = displayObject; _originalX = displayObject.x; _originalY = displayObject.y; _intensity = intensity; _intensityOffset = intensity / 2; _seconds = seconds; _direction = direction; _bDestroy = autoDestroy; } /** * 开始后抖动 */ public
function go():void { if
(_bShaking) return; _bShaking = true; var
msPerUpdate:int
= int(1000
/ FRAME_RATE); var
totalUpdates:int
= int(_seconds * 1000
/ msPerUpdate); if
(!_timer) { _timer = new
Timer(msPerUpdate, totalUpdates); _timer.addEventListener(TimerEvent.TIMER, quake); _timer.addEventListener(TimerEvent.TIMER_COMPLETE, resetImage); } else { _displayObject.x = _originalX; _displayObject.y = _originalY; _timer.reset(); } _timer.start(); } /** * 抖动 * @param event */ private
function quake( event:TimerEvent ):void { var
newX:int = _originalX; var
newY:int = _originalY; switch(_direction) { case
LEFT_RIGHT_UP_DOWN: newX = _originalX + Math.random() * _intensity - _intensityOffset; newY = _originalY + Math.random() * _intensity - _intensityOffset; break; case
LEFT_RIGHT: newX = _originalX + Math.random() * _intensity - _intensityOffset; break; case
UP_DOWN: newY = _originalY + Math.random() * _intensity - _intensityOffset; break; } _displayObject.x = newX; _displayObject.y = newY; } /** * 重置 * @param event */ private
function resetImage( event:TimerEvent = null
):void { _displayObject.x = _originalX; _displayObject.y = _originalY; cleanup(); } /** * 清除 */ private
function cleanup():void { _bShaking = false; /*_timer = null; _timer.stop();*/ _timer.reset(); if
(_bDestroy) { _timer.removeEventListener(TimerEvent.TIMER, quake); _timer.removeEventListener(TimerEvent.TIMER_COMPLETE, resetImage); _timer = null; _displayObject = null; } delete
[this]; //_displayObject = null; } }} |
原文：http://www.cnblogs.com/602147629/p/3553019.html