小编I a*_*ndy的帖子

我有这个代码的例子..

 function rotate() {
      rx = 50 * Math.cos( angle ) + 200;
      ry = 50 * Math.sin( angle ) + 200;
      for( var i = 0; i < plots; i++ ) {
        x = 100 * Math.cos( angle ) + rx;
        y = 100 * Math.sin( angle ) + ry;
        turnangle = Math.atan2( y - ry, x - rx ) * 180 / Math.PI + 90 + 'deg';
        plotcache[ i ].rotate( turnangle );
        plotcache[ i ].position( x, y ); …