I haven’t touched canvas for a long time. I suddenly wanted to review it this afternoon, so I wrote a rotating Tai Chi. Haha, it’s quite fun. I will show the process of writing it here. The rotation is implemented using CSS, not the canvas itself. , I hope the big guys won’t complain.
css
body{ background: #ddd;}#canvas{ position: absolute; left: 40%; top: 30%; -webkit-transform: translate(-50%,-50%); -moz-transform: translate(-50 %,-50%); -ms-transform: translate(-50%,-50%); -o-transform: translate(-50%,-50%); transform: translate(-50%,-50%); -webkit-animation: testAnimate 3s linear infinite; -o-animation: testAnimate 3s linear infinite; animation: testAnimate 3s linear infinite;}@keyframes testAnimate { from { -webkit-transform: rotate(0); -moz-transform: rotate(0); -ms-transform: rotate(0); -o-transform: rotate(0); transform: rotate(0); } to { -webkit-transform: rotate(360deg); -moz-transform: rotate(360deg); -ms-transform: rotate(360deg); -o-transform: rotate(360deg); transform: rotate(360deg); }}html
<body> <canvas id=canvas width=500 height=500></canvas></body>
js
let ctx = document .getElementById(canvas) .getContext(2d);// left-black-bigctx.beginPath();ctx.fillStyle = #000;ctx.arc(250,250,200,Math.PI/2,Math.PI* 1.5,false);ctx.closePath();ctx.fill();// right-white-bigctx.beginPath();ctx.fillStyle = #fff;ctx.arc(250,250,200,Math.PI/2,Math.PI*1.5,true);ctx.closePath();ctx.fill(); // top-black-middlectx.beginPath();ctx.fillStyle = #000;ctx.arc(250,150,100,Math.PI/2,Math.PI*1.5,true);ctx.closePath();ctx.fill();// bottom-white-middlectx.beginPath();ctx. fillStyle = #fff;ctx.arc(250,350,100,Math.PI/2,Math.PI*1.5,false);ctx.closePath();ctx.fill();// top-white-smallctx.beginPath();ctx. fillStyle= #fff;ctx.arc(250,150,25,0,Math.PI*2);ctx.closePath();ctx.fill();// bottom-black-smallctx.beginPath();ctx.fillStyle = #000;ctx.arc(250,350,25,0,Math.PI*2);ctx.closePath();ctx.fill();
Effect
The above is the entire content of this article. I hope it will be helpful to everyone’s study. I also hope everyone will support VeVb Wulin Network.