真當網友都是代碼解析器啊。

最好可以把代碼粘出來，不然看不出問題。應該是時間不對，寫了點擊事件。

望采納

var momObj = function()

{

this.x;

this.y;

this.angle;

this.bigEye = new Image();

this.bigBody = new Image();

this.bigTail = new Image();

}

momObj.prototype.init = function()

{

this.x = canWidth * 0.5;

this.y = canHeight * 0.5;

this.angle = 0;

this.bigEye.src = "./src/bigEye0.png";

this.bigBody.src = "./src/bigSwim0.png";

this.bigTail.src = "./src/bigTail0.png";

}

momObj.prototype.draw = function()

{

this.x = lerpDistance(mx, this.x, 0.99);

this.y = lerpDistance(my, this.y, 0.99);

var deltaY = my - this.y;

var deltaX = mx - this.x;

var beta = Math.atan2(deltaY, deltaX)+ Math.PI;

this.angle = lerpAngle(beta, this.angle, 0.6);

ctx2.save();

ctx2.translate(this.x, this.y);

ctx2.rotate(this.angle);

ctx2.drawImage(this.bigEye, -this.bigEye.width * 0.5, -this.bigEye.height * 0.5);

ctx2.drawImage(this.bigBody, -this.bigBody.width * 0.5, -this.bigBody.height * 0.5);

ctx2.drawImage(this.bigTail, -this.bigTail.width * 0.5 + 30, -this.bigTail.height * 0.5);

ctx2.restore();

}

main.js

var can1;

var can2;

var ctx1;

var ctx2;

var canWidth;

var canHeight;

var lastTime;

var detaTime;

var bgPic = new Image();

var ane;

var fruit;

var mom;

var mx;

var my;

document.body.onload = game;

function game()

{

init();

lastTime = Date.now();

detaTime = 0;

gameloop();

}

function init()

{

//獲得canvas context

can1 = document.getElementById("canvas1");//fishes,dust,ui,circle

ctx1 = can1.getContext('2d');

can2 = document.getElementById("canvas2");//background,ane ,fruits

ctx2 = can2.getContext('2d');

can2.addEventListener('mousemove',onMouseMove, false);

bgPic.src = "./src/background.jpg";

canWidth = can1.width;

canHeight = canvas1.height;

ane = new aneObj();

ane.init();

fruit = new fruitObj();

fruit.init();

mom = new momObj();

mom.init();

mx = canWidth * 0.5;

my = canHeight * 0.5;

}

function gameloop()

{

window.requestAnimFrame(gameloop);

var now = Date.now();

detaTime = now - lastTime;

lastTime = now;

drawBackground();

ane.draw();

fruitMonitor();

fruit.draw();

ctx1.clearRect(0, 0, canWidth, canHeight);

mom.draw();

}

function onMouseMove(e)

{

if(e.offSetX || e.layerX)

{

mx = e.offSetX == undefined ? e.layerX : e.offSetX;

my = e.offSetY == undefined ? e.layerY : e.offSetY;

//console.log(mx);

}

}