大鱼吃小鱼游戏-baby.js

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var babyObj = function(){    this.x;    this.y;    this.babyAngle;    this.babyEye = new Image();    this.babyBody = new Image();    this.babyTail = new Image();    this.babyTailTimer = 0;    this.babyTailCount = 0;    this.babyEyeTimer = 0;    this.babyEyeCount = 0;    this.babyEyeInterval = 1000;    this.babyBodyTimer = 0;    this.babyBodyCount = 0;}babyObj.prototype.init = function(){    this.x = canWidth * 0.5 - 50;    this.y = canHeight * 0.5 + 50;    this.babyAngle = 0;    //this.babyEye.src  = "./src/bigEye0.png";    this.babyBody.src = "./src/babyFade0.png";    //this.babyTail.src = "./src/babyTail0.png";}babyObj.prototype.draw = function(){    //lerp x, y    this.x = lerpDistance(mom.x ,this.x, 0.98);    this.y = lerpDistance(mom.y, this.y, 0.99);    //lerp angel    var deltaY = mom.y - this.y;    var deltaX = mom.x - this.x;    var beta = Math.atan2(deltaY, deltaX) + Math.PI;//-PI , PI    //lerp angle    this.babyAngle = lerpAngle(beta, this.babyAngle, 0.6);  //计算出鱼与鼠标角度    //baby tail count    //this.babyTailTimer += deltaTime;    this.babyTailTimer += 17;    if(this.babyTailTimer > 50)    {        this.babyTailCount = (this.babyTailCount + 1) % 8;        this.babyTailTimer %= 50;    }    //baby eye    this.babyEyeTimer += 17 ;    if(this.babyEyeTimer > this.babyEyeInterval)    {        this.babyEyeCount = (this.babyEyeCount + 1) % 2;        this.babyEyeTimer %= this.babyEyeInterval;        if(this.babyEyeCount == 0)        {            this.babyEyeInterval = Math.random() * 1500 + 2000;//[]        }        else        {            this.babyEyeInterval = 200;        }    }    //baby body    this.babyBodyTimer += 17;    if(this.babyBodyTimer > 300)    {        this.babyBodyCount = this.babyBodyCount +1 ;        this.babyBodyTimer %= 300;  //让小鱼匀速地变白，防止小鱼快速变白        if(this.babyBodyCount > 19 )        {            this.babyBodyCount = 19;            data.gameOver = true;            // game over        }    }    //console.log(deltaTime);    //console.log(this.babyTailCount);    //ctx1    ctx1.save();    //translate()    ctx1.translate(this.x, this.y);     //把鼠标原点移到x,y位置    ctx1.rotate(this.babyAngle);        //鱼跟随大鱼转动    var babyTailCount = this.babyTailCount;    ctx1.drawImage(babyTail[babyTailCount], - babyTail[babyTailCount].width * 0.5 +23, - babyTail[babyTailCount].height * 0.5);    var babyBodyCount =this.babyBodyCount;    ctx1.drawImage(babyBody[babyBodyCount], - babyBody[babyBodyCount].width * 0.5, - babyBody[babyBodyCount].height * 0.5);    var babyEyeCount =this.babyEyeCount;    ctx1.drawImage(babyEye[babyEyeCount], - babyEye[babyEyeCount].width * 0.5, - babyEye[babyEyeCount].height * 0.5);    ctx1.restore();}