慕后端9417217
2017-08-18 17:34
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>tinyHeart</title> <style type="text/css" media="screen"> body{ padding-top: 10px; } .all_bg{ width:800px; height: 600px; margin: 0 auto; } #allcanvas{ position: relative; width:800px; height: 600px; margin: 0px; } #canvas1{ position:absolute; bottom: 0; left: 0; z-index: 1; } #canvas2{ position:absolute; bottom: 0; left: 0; z-index: 0; } </style> </head> <body> <div> <div id="allcanvas" > <canvas id="canvas1"width="800"height="600"></canvas> <canvas id="canvas2"width="800"height="600"></canvas> </div> </div> <script src="./js/commonFunctions.js"></script> <script src="./js/main.js"></script> <script src="./js/backround.js"></script> </body> </html>
var ctx1; var ctx2; var canWidth; var canHight; var lastTime; var deltaTime; var bgPic=new Image(); document.body.onload=game; function game(){ init(); lastTime=Date.now(); deltaTime=0; gameloop(); } //初始化工作 function init(){ var can1=document.getElementById('canvas1');//fishes,dust,ui,circle ctx1=can1.getContext("2d"); var can2=document.getElementById('canvas2');//background,ane海葵,fruits ctx2=can2.getContext("2d"); bgPic.src='./src/background.jpg'; canWidth=ctx1.width; canHight=ctx1.height; } //动画循环 function gameloop(){ window.requestAnimFrame(gameloop);//根据计算机性能自动设置间隔多少时间绘制下一帧 var now=Date.now(); deltaTime=now-lastTime; lastTime=now; drawBg(); }
function drawBg(){ ctx2.drawImage(bgPic,0,0,canWidth,canHight); }
怎么解决的 能说一下吗
已解决~
HTML5小游戏---爱心鱼(上)
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