基于Two.js实现的一个小demo，星球环绕动画效果

时间：2023-01-12 19:20:16

基于Two.js实现的一个小demo，星球环绕动画效果

下面是核心js code HTML就不贴了，需要引入two.js文件:

        var elem = document.getElementById('draw-animation');

        var two = new Two({ width: 700, height: 700 }).appendTo(elem);

        //外层大运行轨迹

        var track = two.makeCircle(0, 0, 200);

        track.fill='transparent';

        track.stroke='#3366FF';

        track.linewidth=3;

        //sun

        var sun = two.makeCircle(0,0,80);

        sun.fill='#FF8000';

        sun.stroke='#FF0000';

        sun.linewidth=5;

        //earth

        var earth = two.makeCircle(0,0,50);

        earth.fill='#9ACD32';

        //moon

        var moon = two.makeCircle(100,0,30);

        moon.fill='#1C75BC';

        //inline 小的运行轨迹

        var inline = two.makeCircle(0,0,100);

        inline.stroke='#3366FF';

        inline.fill='transparent';

        inline.linewidth=3;

        //group 分组 一类型为一组

        var group = two.makeGroup(inline,earth,moon);

        console.dir(group);

        var group1 = two.makeGroup(sun,track,group);

        group1.translation.set(two.width / 2, two.height / 2); //平移(x,y)父元素的一半

        group.translation.set(200, 0);

        group.scale = 0.8; //比例

        two.bind('update', function(frameCount) {//执行动画

           group1.rotation += 0.01 *2* Math.PI;

           group.rotation += 0.01 * Math.PI;

        }).play();

　　

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