3回答

• 

  MIS_Lu

  2015-11-30 19:53:07

  求解答！！！！！！！！！！！！！！！！！！

  0 0
• 

  MIS_Lu

  2015-11-30 19:52:46

  和你一样的问题，我的代码是

  var can1,can2;

  var ctx1,ctx2;

  var lastTime,deltaTime;

  var bgPic = new Image();

  var canWidth;

  var canHeight;

  
  

  document.body.onload = game;

  function game () {

  init();

  lastTime = Date.now();

  deltaTime = 0;

  gameloop();

  }

  function init () {

  can1= document.getElementById('canvas1');

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

  can2= document.getElementById('canvas2');

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

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

  canWidth = can1.width;

  canHeight = can1.height;

  }

  
  

  function gameloop () {

  window.requestAnimFrame(gameloop);

  var now = Date.now();

  deltaTime = now-lastTime;

  lastTime = now;

  drawBackground();

  
  

  }

  background.js的代码是：

  function drawBackground () {

  ctx2.drawImage(bgPic,0,0,canWidth,canHeight);

  
  

  }

  
  

  0 0
• 

  月下风物语

  2015-11-10 16:13:59

  你的这里：

  canWidth=canvas1.width;

  canHeight=canvas1.height;

  改成：

  canWidth=can1.width;

  canHeight=can1.height;

  试下

  
  

  0 0