本文主要是介绍行星旋转案例canvas-konva.js未封装前的代码，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
静止状态下：
整体代码：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no"><title>webitcast案例</title><style>body {padding: 0;margin: 0;background-color: #f0f0f0;overflow: hidden;}</style><script src="bower_components/konva/konva.min.js"></script>
</head>
<body><div id="container"></div><script type="text/javascript">var stage=new Konva.Stage({//创建舞台container:'container',width:window.innerWidth,height:window.innerHeight});var bgLayer=new Konva.Layer();stage.add(bgLayer);//开始创建圆形//中心点坐标var centX=stage.width()/2;var centY=stage.height()/2;//圆形的半径var innerRadius=126;var outerRadius=220;//虚线圆环var innerCircle=new Konva.Circle({x:centX,y:centY,radius:innerRadius,stroke:'#ccc',strokeWidth:4,dash: [10,4],//虚线});var outerCircle=new Konva.Circle({x:centX,y:centY,radius:outerRadius,stroke:'#ccc',strokeWidth:4,dash: [10,4],});//中心蓝色的圆圈var centerCircle=new Konva.Circle({x:centX,y:centY,radius:70,fill:'#525A82',opacity:.8});//中心圆形的圆环var centerRing=new Konva.Ring({x: centX,y: centY,innerRadius: 70,//内环的半径outerRadius: 88,//外环的半径fill: '#E1E1E1',opacity: .6})//添加中心圆形的字体var centerText=new Konva.Text({x:centX-140/2,y:centY-9,width:130,align:'center',text:'web全栈',fontSize:18,fontFamily: '微软雅黑',fill: '#fff',fontStyle:'bold'});// 开始画动画层//第一层圆形，黄色的// 坐标设置var x1=centX+innerRadius*Math.cos(-60*Math.PI/180);var y1=centY+innerRadius*Math.sin(-60*Math.PI/180);var orangeCircle1=new Konva.Circle({x:x1,y:y1,radius:30,fill:'orange',opacity:.7});//黄色圆的圆环var orangeRing1=new Konva.Ring({x:x1,y:y1,innerRadius:30,outerRadius:38,fill: '#E1E1E1',opacity: .6});console.log(x1)console.log(y1)var orangeText=new Konva.Text({x:x1-30,y:y1-8,width:60,// align:'center',text:'HTML5',fontSize:16,fontFamily: '微软雅黑',fill: '#fff',fontStyle:'bold'});//第一层圆形，Pink色的var x2=centX+innerRadius*Math.cos(180*Math.PI/180);var y2=centY+innerRadius*Math.sin(180*Math.PI/180);var pinkCircle1=new Konva.Circle({x:x2,y:y2,radius:30,fill:'pink',opacity:.7});var pinkRing1=new Konva.Ring({x:x2,y:y2,innerRadius:30,outerRadius:38,fill: '#E1E1E1',opacity: .6});var pinkText=new Konva.Text({x:x2-30,y:y2-8,width:60,align:'center',text:'CSS3',fontSize:16,fontFamily: '微软雅黑',fill: '#fff',fontStyle:'bold'});第2层圆形，blue色的var x3=centX+outerRadius*Math.cos(45*Math.PI/180);var y3=centY+outerRadius*Math.sin(45*Math.PI/180);var blueCircle2=new Konva.Circle({x:x3,y:y3,radius:40,fill:'#A4C9F6',opacity:.7});var blueRing2=new Konva.Ring({x:x3,y:y3,innerRadius:40,outerRadius:50,fill: '#E1E1E1',opacity: .6});var blueText=new Konva.Text({x:x3-40,y:y3-8,width:80,align:'center',text:'JS',fontSize:16,fontFamily: '微软雅黑',fill: '#fff',fontStyle:'bold'});bgLayer.add(innerCircle);bgLayer.add(outerCircle);bgLayer.add(centerCircle);bgLayer.add(centerRing);bgLayer.add(centerText);bgLayer.add(orangeCircle1);bgLayer.add(orangeRing1);bgLayer.add(orangeText);bgLayer.add(pinkCircle1);bgLayer.add(pinkRing1);bgLayer.add(pinkText);bgLayer.add(blueCircle2);bgLayer.add(blueRing2);bgLayer.add(blueText);bgLayer.draw();</script>
</body>
</html>
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