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【可调】螺线管磁感线模型
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flash文件较大，可能需要等2分钟并刷新几次页面才能看到。
[flash]http://www.swfcabin.com/swf-files/1344416163.swf[/flash]
http://www.swfcabin.com/swf-files/1344416163.swf
真正做的时候其实只花了一个通宵，大部分时间花在寻找灵感上了。
上图是下午做的，由于磁感线是封闭曲线，所以想到了椭圆，做出来就是这种样子。
最大的错误就在于电感外部的磁感线密度太大了，这一看就是错的。
所以晚上改成了这种样子，其实还是椭圆，不过里面一半外面一半，控制好他的宽度就行了。当时翻了翻书，书上有例题说线圈中部的磁感强度是边缘的2倍，我就想当然的把半径弄成了2倍的关系。磁感线做了10对就不想做了。
由于圆面积是与半径的平方相关的，所以在凌晨的时候改成了1.414倍。最开始编程的时候就没有用duplicateMovieClip函数，所以得一根根的改。不过好在注意了写注释，所以修改起来还算方便的。
点右键可以放大，这个电感模型是以前做好的，半透明状的，还能看到后面的导线。
接下来的任务就是将电感放到电路里面去了。
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背景音乐据说是纳粹焚化炉前的婚礼乐曲。
Artist：Leonard Cohen
Song：Dance Me To The End Of Love
Dance me to your beauty with a burning violin
Dance me through the panic 'til I'm gathered safely in
Lift me like an olive branch and be my homeward dove
Dance me to the end of love
Dance me to the end of love
Oh let me see your beauty when the witnesses are gone
Let me feel you moving like they do in Babylon
Show me slowly what I only know the limits of
Dance me to the end of love
Dance me to the end of love
Dance me to the wedding now, dance me on and on
Dance me very tenderly and dance me very long
We're both of us beneath our love, we're both of us above
Dance me to the end of love
Dance me to the end of love
Dance me to the children who are asking to be born
Dance me through the curtains that our kisses have outworn
Raise a tent of shelter now, though every thread is torn
Dance me to the end of love
Dance me to your beauty with a burning violin
Dance me through the panic till I'm gathered safely in
Touch me with your naked hand or touch me with your glove
Dance me to the end of love
Dance me to the end of love
Dance me to the end of love
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右键保存或打开。如果没有flash player，下载后拖到网页浏览器里可以看，不过要点击地址栏下面出现的黄条允许阻止的内容。
https://blog.sciencenet.cn/blog-729147-600310.html
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