本文实例讲述了HTML5游戏引擎LTweenLite实现的超帅动画效果。分享给大家供大家参考，具体如下：
lufylegend.js是一个开源的HTML5游戏引擎，在游戏中往往会有各种的动画，这些动画有些是flash文件，有些是视频文件，本次就来利用lufylegend制作一个帅气的游戏动画，如下图。
测试连接如下：
http://lufylegend.com/demo/effects01/
一、准备工作
准备工作当然就是引擎的下载了。
lufylegend.js引擎官网
http://lufylegend.com/lufylegend
lufylegend.js引擎在线API文档链接
http://lufylegend.com/lufylegend/api
二、制作过程
要做动画，一般是要用到时间轴，在lufylegend.js引擎中时间轴事件用法如下
复制代码 代码如下:layer.addEventListener(LEvent.ENTER_FRAME, onframe);
比如我们让一个对象A不断的向右移动，我们可一这么做
layer.addEventListener(LEvent.ENTER_FRAME, onframe); function onframe(event){ A.x += 1; }
时间轴是游戏和动画的制作中最常用的方法，但是本次制作动画，采用另一种做法，就是LTweenLite。
LTweenLite是lufylegend.js引擎中的缓动类，在动画制作过程中非常的有用，甚至比一般的时间轴事件更为方便，在接下来的开发，所有的动画都是通过LTweenLite缓动类类实现的。
1. 当然，要先准备HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8" /> <title>effects01</title> <script type="text/javascript" src="js/lufylegend-1.8.0.simple.min.js"></script> <script type="text/javascript" src="js/lufylegend.LoadingSample4-0.1.0.min.js"></script> </head> <body> <div id="legend"></div> <script> <／script> </body> </html>
2. 接着引擎初期化，还有图片读取
var imgData = [ {name:"background",path:"background.jpg"}, {name:"background_ad",path:"background_ad.jpg"}, {name:"card01",path:"card01.png"}, {name:"card02",path:"card02.png"}, {name:"card03",path:"card03.png"}, {name:"card04",path:"card04.png"}, {name:"card05",path:"card05.png"}, {name:"effects",path:"effects.png"}, {name:"stable_assets",path:"stable_assets.png"} ]; var dataList; var loadingLayer,charaLayer,stageLayer; var warshipDown,playerText,enemyText,windowUp,title,big_vs,background,swords,swords02; if(LGlobal.canTouch){ LGlobal.stageScale = LStageScaleMode.EXACT_FIT; LSystem.screen(LStage.FULL_SCREEN); } init(20,"legend",320,410,main); function main(){ loadingLayer = new LoadingSample4(); addChild(loadingLayer); /**读取图片*/ LLoadManage.load(imgData, function(progress){ loadingLayer.setProgress(progress); },gameInit); }
上面代码，当使用手机浏览的时候，会设定界面为全屏。
3. 建立一个自动闪烁的背景
/** * 背景 * */ function BackGround(bg01,bg02){ var self = this; base(self,LSprite,[]); self.bitmapBG01 = new LBitmap(new LBitmapData(bg01)); self.addChild(self.bitmapBG01); self.bitmapBG02 = new LBitmap(new LBitmapData(bg02)); self.addChild(self.bitmapBG02); self.run(); } /** * 让背景类的两个图片中的上层图片，不断的交替显示和隐藏状态，以达到明暗交替闪烁的效果 * */ BackGround.prototype.run = function(){ var self = this; var tween = LTweenLite.to(self.bitmapBG02,0.5,{alpha:0,ease:Bounce.easeIn}). to(self.bitmapBG02,0.5,{alpha:1,ease:Bounce.easeIn,onComplete:function(){ self.run(); }}); }
上面代码，用到了lufylegend.js引擎1.8.0版本的新功能，连续缓动，并且当缓动结束之后，再调用本身的run函数，从而实现了循环。
4. 一艘不断发射炮弹的战舰
/** * 战舰 * */ function Warship(shipData,shotData){ var self = this; base(self,LSprite,[]); self.bitmapShip = new LBitmap(shipData); self.addChild(self.bitmapShip); self.bitmapShot = new LBitmap(shotData); self.bitmapShot.x = -10; self.bitmapShot.y = self.bitmapShip.y + 123; self.addChild(self.bitmapShot); self.bitmapShot.rotate = -75; self.bitmapShot.alpha = 0; self.bitmapShot02 = new LBitmap(shotData); self.bitmapShot02.scaleX = self.bitmapShot02.scaleY = 0.7; self.bitmapShot02.x = 65; self.bitmapShot02.y = self.bitmapShip.y + 220; self.addChild(self.bitmapShot02); self.bitmapShot02.rotate = -80; self.bitmapShot02.alpha = 0; self.run(); self.shot(); } /** * 让战舰上下浮动 * */ Warship.prototype.run = function(){ var self = this; LTweenLite.to(self.bitmapShip,1,{y:5,ease:Quad.easeInOut}). to(self.bitmapShip,1,{y:0,ease:Quad.easeInOut,onComplete:function(){ self.run(); }}); } /** * 让战舰开火发炮 * */ Warship.prototype.shot = function(){ var self = this; LTweenLite.to(self.bitmapShot,0.1,{delay:1.5,alpha:1,ease:Quad.easeInOut,onUpdate:function(obj){ obj.y = obj.parent.bitmapShip.y + 123; }}) .to(self.bitmapShot,0.1,{alpha:0,ease:Quad.easeInOut}) .to(self.bitmapShot02,0.1,{delay:0.5,alpha:1,ease:Quad.easeInOut,onUpdate:function(obj){ obj.y = obj.parent.bitmapShip.y + 220; }}) .to(self.bitmapShot02,0.1,{alpha:0,ease:Quad.easeInOut,onComplete:function(){ self.shot(); }}); }
上面代码，利用了同样的方法实现了循环。
5. 一个闪烁的标题
/** * 标题 * */ function Title(bitmapData){ var self = this; base(self,LSprite,[]); self.bitmap = new MiddleBitmap(bitmapData); self.bitmap.scaleX = self.bitmap.scaleY = 0.5; self.addChild(self.bitmap); self.run(); } /** * 通过改变标题的透明状态，让标题明暗交替闪烁 * */ Title.prototype.run = function(){ var self = this; LTweenLite.to(self.bitmap,1,{alpha:0.4,ease:Quad.easeInOut}). to(self.bitmap,1,{alpha:1,ease:Quad.easeInOut,onComplete:function(obj){ obj.parent.run(); }}); }
上面代码，通过不断的改变图片的透明度，实现了标题的闪烁显示。
6. 可以翻转显示图片的宝剑类
/** * 剑，通过参数scale的直，来设定剑的图片是否翻转 * */ function Swords(bitmapData,scale){ var self = this; base(self,LSprite,[]); self.bitmapSwords = new LBitmap(bitmapData); self.bitmapSwords.x = -self.bitmapSwords.getWidth()*0.5; self.bitmapSwords.y = -self.bitmapSwords.getHeight()*0.5; if(scale == -1){ self.bitmapSwords.scaleY = scale; self.bitmapSwords.y += self.bitmapSwords.getHeight(); } self.addChild(self.bitmapSwords); }
7. 将图片移动到顶点的对象。将子对象LBitmap的中心移动到该对象的原点的话，好处就是无论对象伸缩还是旋转，对象显示的位置不会发生变化了。
/** * 将LBitmap对象的中心放到一个对象的原点，并返回这个对象 * */ function MiddleBitmap(bitmapData){ var self = this; base(self,LSprite,[]); self.bitmapTitle = new LBitmap(bitmapData); self.bitmapTitle.x = -self.bitmapTitle.getWidth()*0.5; self.bitmapTitle.y = -self.bitmapTitle.getHeight()*0.5; self.addChild(self.bitmapTitle); }
8. 一个特效类
/** * 特效类，特效图片加入后，特效显示完毕之后自动消失 * */ function Effect(index){ var self = this; base(self,LSprite,[]); var bitmapData; switch(index){ case 0: bitmapData = new LBitmapData(dataList["effects"],99,45,116,96); break; case 1: bitmapData = new LBitmapData(dataList["effects"],102,278,110,88); break; case 2: bitmapData = new LBitmapData(dataList["effects"],357,85,122,127); break; case 3: bitmapData = new LBitmapData(dataList["effects"],346,357,108,99); break; case 4: bitmapData = new LBitmapData(dataList["effects"],246,918,57,62); break; } self.item = new MiddleBitmap(bitmapData); self.item.scaleX = self.item.scaleY = 0.1; self.addChild(self.item); LTweenLite.to(self.item,0.1,{scaleX:2,scaleY:2,ease:Quad.easeInOut}) .to(self.item,0.2,{scaleX:3,scaleY:3,alpha:0,ease:Quad.easeInOut,onComplete:function(obj){ var eff = obj.parent; eff.parent.removeChild(eff); }}); }
上面的特效类，当特效对象添加到画面上后，会逐渐自动消失。
9. 添加人物到画面上
/** * 添加人物图片到界面里 * */ function setChara(){ charaLayer = new LSprite(); stageLayer.addChild(charaLayer); var charaBitmap,sy = 220; var charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card01"])); charaBitmap.scale = 0.4; charaBitmap.x = 110; charaBitmap.ty = 50; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card02"])); charaBitmap.scale = 0.45; charaBitmap.x = 85; charaBitmap.ty = 90; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card03"])); charaBitmap.scale = 0.55; charaBitmap.x = 70; charaBitmap.ty = 140; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card04"])); charaBitmap.scale = 0.65; charaBitmap.x = 75; charaBitmap.ty = 215; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card05"])); charaBitmap.scale = 0.75; charaBitmap.x = 85; charaBitmap.ty = 280; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); //right charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card05"])); charaBitmap.scale = 0.4; charaBitmap.x = 215; charaBitmap.ty = 50; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card04"])); charaBitmap.scale = 0.45; charaBitmap.x = 240; charaBitmap.ty = 90; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card01"])); charaBitmap.scale = 0.55; charaBitmap.x = 260; charaBitmap.ty = 140; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card03"])); charaBitmap.scale = 0.65; charaBitmap.x = 260; charaBitmap.ty = 215; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); charaBitmap = new MiddleBitmap(new LBitmapData(dataList["card02"])); charaBitmap.scale = 0.75; charaBitmap.x = 242; charaBitmap.ty = 280; charaBitmap.y = sy; charaBitmap.alpha = 0; charaLayer.addChild(charaBitmap); }
向左右两边各添加五个人物，并且设定好他么最终要显示到画面上的目标位置和目标大小。
用下面的函数，可以添加一个特效
function addEff(index,x,y){ var eff = new Effect(index); eff.x = x; eff.y = y; stageLayer.addChild(eff); }
10. 下面先将所有的对象添加到画面上，一开始暂时不用显示的对象，将它的visible属性设置成false；
/** * 将所有对象和图片都添加到界面上 * */ function addItem(){ backLayer = new LSprite(); stageLayer.addChild(backLayer); backLayer.scaleX = backLayer.scaleY = 2; background = new BackGround(dataList["background"],dataList["background_ad"]); background.x = -60; background.y = -50; backLayer.addChild(background); var warship = new Warship(new LBitmapData(dataList["stable_assets"],0,0,409,480) ,new LBitmapData(dataList["stable_assets"],754,0,270,250)); warship.scaleX = warship.scaleY = 0.8; backLayer.addChild(warship); setChara(); warshipDown = new LSprite(); warshipDown.y = LGlobal.height; stageLayer.addChild(warshipDown); var warship02 = new LBitmap(new LBitmapData(dataList["stable_assets"],0,505,720,310)); warship02.scaleX = warship02.scaleY = 0.5; warship02.x = (LGlobal.width - warship02.getWidth())*0.5; warshipDown.addChild(warship02); var small_vs = new MiddleBitmap(new LBitmapData(dataList["stable_assets"],726,502,120,120)); small_vs.scaleX = small_vs.scaleY = 0.6; small_vs.x = LGlobal.width*0.5; small_vs.y = LGlobal.height - 355; warshipDown.addChild(small_vs); playerText = new LTextField(); playerText.color = "red"; playerText.text = "player"; playerText.x = (LGlobal.width*0.5 - playerText.getWidth())*0.5; playerText.y = 30; warshipDown.addChild(playerText); enemyText = new LTextField(); enemyText.color = "red"; enemyText.text = "enemy"; enemyText.x = LGlobal.width*0.5 + (LGlobal.width*0.5 - enemyText.getWidth())*0.5; enemyText.y = 30; warshipDown.addChild(enemyText); windowUp = new LSprite(); windowUp.y = -50; stageLayer.addChild(windowUp); var title_battle = new MiddleBitmap(new LBitmapData(dataList["stable_assets"],897,469,45,239)); title_battle.rotate = -90; title_battle.scaleX = title_battle.scaleY = 0.55; title_battle.x = LGlobal.width*0.5; title_battle.y = 10; windowUp.addChild(title_battle); var chain = new LBitmap(new LBitmapData(dataList["stable_assets"],880,264,71,180)); chain.rotate = -90; chain.scaleX = chain.scaleY = 0.5; windowUp.addChild(chain); var chain01 = new LBitmap(new LBitmapData(dataList["stable_assets"],851,740,100,173)); chain01.rotate = -90; chain01.scaleX = chain01.scaleY = 0.6; chain01.x = 240; windowUp.addChild(chain01); title = new Title(new LBitmapData(dataList["stable_assets"],415,425,405,80)); title.x = LGlobal.width*0.5; title.y = 290; title.alpha = 0; title.visible = false; stageLayer.addChild(title); big_vs = new MiddleBitmap(new LBitmapData(dataList["stable_assets"],420,5,340,330)); big_vs.rotate = -90; big_vs.x = LGlobal.width*0.5; big_vs.y = 170; big_vs.alpha = 0; big_vs.visible = false; stageLayer.addChild(big_vs); swords = new Swords(new LBitmapData(dataList["stable_assets"],405,335,454,89),1); swords.x = LGlobal.width*0.5; swords.y = LGlobal.height*0.5 - 60; swords.rotate = -135; swords.scaleX = swords.scaleY = 0.8; swords.visible = false; stageLayer.addChild(swords); swords02 = new Swords(new LBitmapData(dataList["stable_assets"],405,335,454,89),-1); swords02.x = LGlobal.width*0.5; swords02.y = LGlobal.height*0.5 - 60; swords02.rotate = -45; swords02.scaleX = swords02.scaleY = 0.8; swords02.visible = false; stageLayer.addChild(swords02); }
11. 利用缓动功能，实现动画。
先看第一个动画
/* * 第一个动画开始播放 * */ function animation01Start(event){ if(event){ stageLayer.die(); stageLayer.removeAllChild(); } /*添加所有对象*/ addItem(); /*所有人物开始缓动*/ var charaList = charaLayer.childList,chara,delayValue,duration; for(var i=0,l=charaList.length;i<l i="" chara="charaList[i];" y="220;" scalex="chara.scaleY" 2="" delayvalue="0.1*i;" if="">= 5){ delayValue = 0.1*(i - 5); } duration = 1 - delayValue; chara.y = 220; LTweenLite.to(chara,duration,{delay:delayValue,alpha:1,scaleX:chara.scale,scaleY:chara.scale,ease:Strong.easeOut}) .to(chara,1,{y:chara.ty,ease:Strong.easeOut}); } /*背景缓动，变大左移上移→变小右移下移*/ LTweenLite.to(backLayer,1,{scaleX:1.3,scaleY:1.3,x:-100,y:-50,ease:Strong.easeOut}) .to(backLayer,1,{scaleX:1,scaleY:1,x:0,y:0,ease:Strong.easeOut}); /*下面窗口缓动，延时→上移→标题可显示＋VS可显示*/ LTweenLite.to(warshipDown,0.5,{delay:1.5,y:320,ease:Elastic.easeOut,onComplete:function(){ title.visible = big_vs.visible = true; }}); /*上面窗口缓动，延时→下移*/ LTweenLite.to(windowUp,0.5,{delay:1.5,y:0,ease:Elastic.easeOut}); /*上面窗口缓动，延时→不透明*/ LTweenLite.to(title,0.2,{delay:1.5,alpha:1,ease:Elastic.easeOut}); /*VS标题缓动，延时→不透明缩小→缩小→添加特效并且进入第二个动画初始化*/ LTweenLite.to(big_vs,0.5,{delay:1.5,alpha:1,scaleX:1,scaleY:1,ease:Elastic.easeOut}) .to(big_vs,1,{scaleX:0.45,scaleY:0.45,ease:Elastic.easeOut,onComplete:function(){ addEff(1,big_vs.x,big_vs.y); addEff(1,big_vs.x,big_vs.y); /*所有缓动后，动画2开始准备*/ animation02Init(); }}); }
第二个动画
/* * 第二个动画开始播放 * */ function animation02Start(event){ stageLayer.removeEventListener(LMouseEvent.MOUSE_UP, animation02Start); /*VS缓动，变大变透明→然后消失*/ LTweenLite.to(big_vs,1,{scaleX:2,scaleY:2,alpha:0,ease:Elastic.easeIn,onComplete:function(){ big_vs.parent.removeChild(big_vs); }}); /*背景缓动，变大→变大→变小*/ LTweenLite.to(backLayer,2,{delay:1,scaleX:1.2,scaleY:1.2,x:-100,y:-50,ease:Sine.easeInOut}) .to(backLayer,1,{scaleX:1.5,scaleY:1.5,ease:Sine.easeInOut}) .to(backLayer,0.5,{scaleX:1,scaleY:1,x:0,y:0,ease:Sine.easeInOut}); /*下面窗口缓动，下移→上移*/ LTweenLite.to(warshipDown,0.5,{delay:0.5,y:LGlobal.height,ease:Strong.easeOut}) .to(warshipDown,0.5,{delay:3,y:320,ease:Strong.easeOut}); /*上面窗口缓动，上移→下移*/ LTweenLite.to(windowUp,0.5,{delay:0.5,y:-50,ease:Strong.easeOut}) .to(windowUp,0.5,{delay:3,y:0,ease:Strong.easeOut}); /*标题缓动，无效果→不显示＋人物缓动开始→显示*/ LTweenLite.to(title,0.5,{delay:0.5,ease:Strong.easeOut,onComplete:function(obj){ obj.visible = false; charaBattle(); }}) .to(title,0.5,{delay:3,ease:Strong.easeOut,onComplete:function(obj){ obj.visible = true; }}); /*宝剑变为可显示，且坐标设定在画面之外*/ swords.visible = true; swords02.visible = true; swords.x = -200; swords02.x = LGlobal.width + 200; var wait = 4; /*左边宝剑缓动，向右移动屏幕中间*/ LTweenLite.to(swords,0.5,{delay:wait,x:LGlobal.width*0.5,ease:Elastic.easeOut}); /*右边宝剑缓动，向左移动屏幕中间*/ LTweenLite.to(swords02,0.5,{delay:wait,x:LGlobal.width*0.5,ease:Elastic.easeOut}); /*stageLayer缓动，无效果延时，结束后添加特效并且进入第一个动画初始化*/ LTweenLite.to(stageLayer,0.2,{delay:wait,onComplete:function(){ addEff(Math.random()*5 >> 0,LGlobal.width*0.5,LGlobal.height*0.4); addEff(Math.random()*5 >> 0,LGlobal.width*0.5,LGlobal.height*0.4); addEff(Math.random()*5 >> 0,LGlobal.width*0.5,LGlobal.height*0.4); animation01Init(); }}); }
12. 最后是，两个动画结束后要添加点击事件，点击屏幕让两个动画可以相互切换
/* * 点击画面后，第一个动画开始播放 * */ function animation01Init(){ stageLayer.addEventListener(LMouseEvent.MOUSE_UP, animation01Start); } /* * 点击画面后，第二个动画开始播放 * */ function animation02Init(){ stageLayer.addEventListener(LMouseEvent.MOUSE_UP, animation02Start); }
完成了，以上是所有代码。欢迎大家一起交流
三、源码
完整实例代码点击此处本站下载。
希望本文所述对大家JavaScript程序设计有所帮助。