Javascript jQuery插件使一个元素环绕另一个元素？

修订版： 有任何jQuery插件可以使一个元素围绕另一个元素旋转吗

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编辑：所说的“环绕”，是指围绕另一个元素在同一个z指数上旋转。

这个答案取代了我对这个问题的其他回答。

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可以使用“.”方法修改元素的“top”和“left”属性。这是一个例子

HTML:

Javascript:

 $('#moon').animate({left: 100}, 2000)
           .animate({top:  100}, 2000)
           .animate({left:   0}, 2000)
           .animate({top:    0}, 2000);    

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如果您想在几年前我制作的一个演示页面的原始Javascript中看到一些东西：

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单击JavaScript演示按钮。页面没有压缩或缩小，因此JavaScript非常干净。

下面是我开发的简单jQuery插件，用于提供您要求的“动态观察”功能。有关如何使用它的示例，请参见

    ( function ( $ ) {
        jQuery.fn.orbit = function(s, options){
            var settings = {
                            orbits:    1     // Number of times to go round the orbit e.g. 0.5 = half an orbit
                           ,period:    3000  // Number of milliseconds to complete one orbit.
                           ,maxfps:    25    // Maximum number of frames per second. Too small gives "flicker", too large uses lots of CPU power
                           ,clockwise: true  // Direction of rotation.
            };
            $.extend(settings, options);  // Merge the supplied options with the default settings.

            return(this.each(function(){
                var p        = $(this);

/* First obtain the respective positions */

                var p_top    = p.css('top' ),
                    p_left   = p.css('left'),
                    s_top    = s.css('top' ),
                    s_left   = s.css('left');

/* Then get the positions of the centres of the objects */

                var p_x      = parseInt(p_top ) + p.height()/2,
                    p_y      = parseInt(p_left) + p.width ()/2,
                    s_x      = parseInt(s_top ) + s.height()/2,
                    s_y      = parseInt(s_left) + s.width ()/2;

/* Find the Adjacent and Opposite sides of the right-angled triangle */
                var a        = s_x - p_x,
                    o        = s_y - p_y;

/* Calculate the hypotenuse (radius) and the angle separating the objects */

                var r        = Math.sqrt(a*a + o*o);
                var theta    = Math.acos(a / r);

/* Calculate the number of iterations to call setTimeout(), the delay and the "delta" angle to add/subtract */

                var niters   = Math.ceil(Math.min(4 * r, settings.period, 0.001 * settings.period * settings.maxfps));
                var delta    = 2*Math.PI / niters;
                var delay    = settings.period  / niters;
                if (! settings.clockwise) {delta = -delta;}
                niters      *= settings.orbits;

/* create the "timeout_loop function to do the work */

                var timeout_loop = function(s, r, theta, delta, iter, niters, delay, settings){
                    setTimeout(function(){

/* Calculate the new position for the orbiting element */

                        var w = theta + iter * delta;
                        var a = r * Math.cos(w);
                        var o = r * Math.sin(w);
                        var x = parseInt(s.css('left')) + (s.height()/2) - a;
                        var y = parseInt(s.css('top' )) + (s.width ()/2) - o;

/* Set the CSS properties "top" and "left" to move the object to its new position */

                        p.css({top:  (y - p.height()/2),
                               left: (x - p.width ()/2)});

/* Call the timeout_loop function if we have not yet done all the iterations */

                        if (iter < (niters - 1))  timeout_loop(s, r, theta, delta, iter+1, niters, delay, settings);
                    }, delay);
                };

/* Call the timeout_loop function */

                timeout_loop(s, r, theta, delta, 0, niters, delay, settings);
            }));
        }
    }) (jQuery);

    $('#mercury').orbit($('#sun'  ), {orbits:  8, period:  2000});
    $('#venus'  ).orbit($('#sun'  ), {orbits:  4, period:  4000});
    $('#earth'  ).orbit($('#sun'  ), {orbits:  2, period:  8000}).css({backgroundColor: '#ccffcc'});
    $('#moon'   ).orbit($('#earth'), {orbits: 32, period:   500, maxfps: 20, clockwise: false});       
    $('#mars'   ).orbit($('#sun'  ), {orbits:  1, period: 16000});

rotnew=（Math.asin（应收）*180）/Math.PI；
if（y

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这三条线（放置在环内）允许每个“行星”保持垂直于轨道中心，当然，如果旋转物体是圆的，它不会做任何事情：D

因为“轨道”在网络上根本不是什么常见的东西（你上次看到它是什么时候？），所以出现流行的，维护良好的通用“轨道”插件。你说的轨道是什么意思？？有很多动画类型的旋转木马，但什么是轨道，是像其他内容旋转的内容吗？嘿，谢谢！这很好。我很高兴，这对我来说是一次很好的精神锻炼，我用剩下的几个脑细胞来挖掘我40多年前的三角知识。问候——写得很漂亮。我不喜欢这个。我不喜欢它，但我喜欢它。

 $('#moon').animate({left: 100}, 2000)
           .animate({top:  100}, 2000)
           .animate({left:   0}, 2000)
           .animate({top:    0}, 2000);    

    ( function ( $ ) {
        jQuery.fn.orbit = function(s, options){
            var settings = {
                            orbits:    1     // Number of times to go round the orbit e.g. 0.5 = half an orbit
                           ,period:    3000  // Number of milliseconds to complete one orbit.
                           ,maxfps:    25    // Maximum number of frames per second. Too small gives "flicker", too large uses lots of CPU power
                           ,clockwise: true  // Direction of rotation.
            };
            $.extend(settings, options);  // Merge the supplied options with the default settings.

            return(this.each(function(){
                var p        = $(this);

/* First obtain the respective positions */

                var p_top    = p.css('top' ),
                    p_left   = p.css('left'),
                    s_top    = s.css('top' ),
                    s_left   = s.css('left');

/* Then get the positions of the centres of the objects */

                var p_x      = parseInt(p_top ) + p.height()/2,
                    p_y      = parseInt(p_left) + p.width ()/2,
                    s_x      = parseInt(s_top ) + s.height()/2,
                    s_y      = parseInt(s_left) + s.width ()/2;

/* Find the Adjacent and Opposite sides of the right-angled triangle */
                var a        = s_x - p_x,
                    o        = s_y - p_y;

/* Calculate the hypotenuse (radius) and the angle separating the objects */

                var r        = Math.sqrt(a*a + o*o);
                var theta    = Math.acos(a / r);

/* Calculate the number of iterations to call setTimeout(), the delay and the "delta" angle to add/subtract */

                var niters   = Math.ceil(Math.min(4 * r, settings.period, 0.001 * settings.period * settings.maxfps));
                var delta    = 2*Math.PI / niters;
                var delay    = settings.period  / niters;
                if (! settings.clockwise) {delta = -delta;}
                niters      *= settings.orbits;

/* create the "timeout_loop function to do the work */

                var timeout_loop = function(s, r, theta, delta, iter, niters, delay, settings){
                    setTimeout(function(){

/* Calculate the new position for the orbiting element */

                        var w = theta + iter * delta;
                        var a = r * Math.cos(w);
                        var o = r * Math.sin(w);
                        var x = parseInt(s.css('left')) + (s.height()/2) - a;
                        var y = parseInt(s.css('top' )) + (s.width ()/2) - o;

/* Set the CSS properties "top" and "left" to move the object to its new position */

                        p.css({top:  (y - p.height()/2),
                               left: (x - p.width ()/2)});

/* Call the timeout_loop function if we have not yet done all the iterations */

                        if (iter < (niters - 1))  timeout_loop(s, r, theta, delta, iter+1, niters, delay, settings);
                    }, delay);
                };

/* Call the timeout_loop function */

                timeout_loop(s, r, theta, delta, 0, niters, delay, settings);
            }));
        }
    }) (jQuery);

    $('#mercury').orbit($('#sun'  ), {orbits:  8, period:  2000});
    $('#venus'  ).orbit($('#sun'  ), {orbits:  4, period:  4000});
    $('#earth'  ).orbit($('#sun'  ), {orbits:  2, period:  8000}).css({backgroundColor: '#ccffcc'});
    $('#moon'   ).orbit($('#earth'), {orbits: 32, period:   500, maxfps: 20, clockwise: false});       
    $('#mars'   ).orbit($('#sun'  ), {orbits:  1, period: 16000});

<h1> The inner planets of the Solar System</h1>
<div id='solar_system'>
    <div id='sun'    >SUN</div>
    <div id='mercury'>m</div>
    <div id='venus'  >v</div>
    <div id='earth'  >e</div>
    <div id='moon'   >m</div>
    <div id='mars'   >m</div>
</div>

#solar_system {position: relative; width: 1600px; height: 1600px; background-color: #222222}
#sun          {position: absolute; width:  80px; height:  80px;
               top: 380px; left: 580px; background-color: #ffff00;
               -moz-border-radius: 40px; border-radius: 40px;
               text-align: center; line-height: 80px;
}
#mercury      {position: absolute; width:  18px; height:  18px;
               top: 335px; left: 535px; background-color: #ffaaaa;
               -moz-border-radius:  9px; border-radius:  9px;
               text-align: center; line-height: 18px;
}
#venus        {position: absolute; width:  36px; height:  36px;
               top: 300px; left: 500px; background-color: #aaaaff;
               -moz-border-radius: 18px; border-radius: 18px;
               text-align: center; line-height: 30px;
}
#earth        {position: absolute; width:  30px; height:  30px;
               top: 200px; left: 400px; background-color: #ffaaaa;
               -moz-border-radius: 15px; border-radius: 15px;
               text-align: center; line-height: 30px;
}
#moon         {position: absolute; width:  12px; height:  12px;
               top: 150px; left: 350px; background-color: #cccccc;
               -moz-border-radius: 6px; border-radius: 6px;
               text-align: center; line-height: 12px;
}
#mars        {position: absolute; width:  24px; height:  24px;
               top: 100px; left: 200px; background-color: #ffaaaa;
               -moz-border-radius: 12px; border-radius: 12px;
               text-align: center; line-height: 24px;
}

rotnew = (Math.asin(a / r) * 180) / Math.PI;

if(y < s_x ){
   rotnew =  - rotnew;
        }
p.css({'transform': 'rotate('+(rotnew)+'deg)'});