[HTML5] html5旋转的太阳系动画

2014-08-19 04:18:47 -0400

代码说明

HTML5 Canvas CSS3模拟实现旋转的太阳系动画，相当牛叉我觉得，以前有一个是CSS3写的，各这个差不多，有兴趣在本站网页特效栏目搜索“CSS3太阳系星球效果图”，各个星球围着太阳旋转，速度不一样，有运动轨迹线，学习Canvas动画的好范例。

代码复制

</head>
<body>
<canvas id="canvas" width="1000" height="1000" style="background:#000">	</canvas>
<script>
var cxt=document.getElementById('canvas').getContext('2d')
function draw(){
	for(var i=0;i<8;i++){
		cxt.beginPath();
		cxt.strokeStyle="gray";
		cxt.closePath();
		cxt.arc(500,500,(i+1)*50,0,360,false);
		cxt.closePath();
		cxt.stroke();
	}
}
draw();
function Star(x,y,radius,cycle,scolor,ecolor){
	this.x=x;
	this.y=y;
	this.radius=radius;
	this.cycle=cycle;
	this.scolor=scolor;
	this.ecolor=ecolor;
	this.color=null;
	this.time=0;
	this.draw=function(){
		cxt.save();
		cxt.translate(500,500);
		cxt.rotate(this.time*(360/this.cycle)*Math.PI/180);
		cxt.beginPath();
		cxt.arc(this.x,this.y,this.radius,0,360,false);
		cxt.closePath();
		this.color=cxt.createRadialGradient(this.x,this.y,0,this.x,this.y,this.radius);
		this.color.addColorStop(0,this.scolor);
		this.color.addColorStop(1,this.ecolor);
		cxt.fillStyle=this.color;
		cxt.fill();
		cxt.restore();
		this.time+=1;
	}
}
	function Sun(){
	Star.call(this,0,0,20,0,"#ff0000","#ff9900");
}
	var sun=new Sun();
	function di(){
		Star.call(this,0,-50,10,87,"#A69697","#5C3E40");
	}
	var di=new di();
	
	function water(){
		Star.call(this,0,-100,10,224.701,"#C4BBAC","#1F1315");
	}
	var water=new water();
	function jin(){
		Star.call(this,0,-150,10,365.2422,"#78B1E8","#050C12");
	}
	var jin=new jin();
	
	function huo(){
		Star.call(this,0,-200,10,686.98,"#CEC9B6","#76422D");
	}
	var huo=new huo();
	function mu(){
		Star.call(this,0,-250,10,4332.589,"#C0A48E","#322222");
	}
	var mu=new mu();
	function tu(){
		Star.call(this,0,-300,10,10759.5,"#F7F9E3","#5C4533");
	}
	var tu=new tu();
	function hai(){
		Star.call(this,0,-350,10,30799.095,"#A7E1E5","#19243A");
	}
	var hai=new hai();
	function ming(){
		Star.call(this,0,-400,10,164.8*365,"#0661B2","#1E3B73");
	}
	var ming=new ming();
	function move(){
	cxt.clearRect(0,0,1000,1000)
	draw();
	ming.draw();
	sun.draw();
	di.draw();
	water.draw();
	jin.draw();
	huo.draw();
	mu.draw();
	tu.draw();
	hai.draw();
	}
setInterval(move,10);
</script>

代码演示

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