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<?php
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// *** 配置文件（表示区域的三维数组）其内的点，必须按顺时针方向依次给出！
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$area = array(
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// 天通苑店
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0 => array(
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array('x'=>116.38295, 'y'=>40.09416),
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array('x'=>116.44037, 'y'=>40.095898),
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array('x'=>116.448275,'y'=>40.083313),
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array('x'=>116.448455,'y'=>40.050818),
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array('x'=>116.448275,'y'=>40.038307),
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array('x'=>116.441448,'y'=>40.038418),
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array('x'=>116.436058,'y'=>40.038804),
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array('x'=>116.417302,'y'=>40.039136),
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array('x'=>116.414822,'y'=>40.039384),
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array('x'=>116.412738,'y'=>40.039329),
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array('x'=>116.407672,'y'=>40.039329),
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array('x'=>116.388628,'y'=>40.085162),
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array('x'=>116.383633,'y'=>40.084997)
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),
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//亚运村
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1 => array(
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array('x'=>116.358804,'y'=>40.028474),
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array('x'=>116.41608, 'y'=>40.02875),
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array('x'=>116.41723, 'y'=>40.038915),
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array('x'=>116.447988,'y'=>40.037921),
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array('x'=>116.447844,'y'=>40.026761),
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array('x'=>116.455821,'y'=>40.024164),
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array('x'=>116.446281,'y'=>39.994736),
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array('x'=>116.443532,'y'=>39.995372),
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array('x'=>116.376267,'y'=>39.993493),
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array('x'=>116.375908,'y'=>40.000015),
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array('x'=>116.372027,'y'=>39.999904),
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array('x'=>116.371452,'y'=>40.007366),
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array('x'=>116.359451,'y'=>40.006758)
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),
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//望京店
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2 => array(
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array('x'=>116.46387, 'y'=>40.021125),
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array('x'=>116.484495,'y'=>40.020462),
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array('x'=>116.515684,'y'=>39.995151),
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array('x'=>116.51519, 'y'=>39.976137),
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array('x'=>116.491906,'y'=>39.972985),
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array('x'=>116.476239,'y'=>39.977298),
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array('x'=>116.467472,'y'=>39.96917),
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array('x'=>116.443325,'y'=>39.984817),
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array('x'=>116.449506,'y'=>39.993109),
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array('x'=>116.446357,'y'=>39.994736),
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array('x'=>116.456037,'y'=>40.024109)
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),
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//大悦城店
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3 => array(
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array('x'=>116.496424,'y'=>39.96253),
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array('x'=>116.479527,'y'=>39.975491),
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array('x'=>116.492921,'y'=>39.972491),
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array('x'=>116.508533,'y'=>39.974454),
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array('x'=>116.535231,'y'=>39.980225),
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array('x'=>116.553485,'y'=>39.975691),
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array('x'=>116.564624,'y'=>39.975028),
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array('x'=>116.571307,'y'=>39.972097),
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array('x'=>116.571666,'y'=>39.946989),
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array('x'=>116.547736,'y'=>39.947763),
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array('x'=>116.549245,'y'=>39.936755),
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array('x'=>116.564624,'y'=>39.937142),
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array('x'=>116.569367,'y'=>39.92995),
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array('x'=>116.570085,'y'=>39.915175),
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array('x'=>116.496424,'y'=>39.914843)
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),
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//北洼路
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4 => array(
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array('x'=>116.24763, 'y'=>39.978677),
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array('x'=>116.280975,'y'=>39.976244),
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array('x'=>116.322872,'y'=>39.991226),
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array('x'=>116.323231,'y'=>39.986859),
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array('x'=>116.339975,'y'=>39.986859),
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array('x'=>116.340263,'y'=>39.982215),
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array('x'=>116.346443,'y'=>39.98216),
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array('x'=>116.354492,'y'=>39.963415),
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array('x'=>116.361822,'y'=>39.963637),
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array('x'=>116.362397,'y'=>39.957664),
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array('x'=>116.37792, 'y'=>39.958106),
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array('x'=>116.37138, 'y'=>39.929728),
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array('x'=>116.367068,'y'=>39.929341),
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array('x'=>116.366637,'y'=>39.924361),
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array('x'=>116.37138, 'y'=>39.924361),
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array('x'=>116.369655,'y'=>39.913626),
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array('x'=>116.362325,'y'=>39.912962),
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array('x'=>116.363188,'y'=>39.903774),
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array('x'=>116.317194,'y'=>39.902999),
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array('x'=>116.259415,'y'=>39.902778)
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),
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//安贞店
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5 => array(
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array('x'=>116.372171,'y'=>39.993161),
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array('x'=>116.443676,'y'=>39.994985),
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array('x'=>116.448419,'y'=>39.993548),
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array('x'=>116.43807, 'y'=>39.97735),
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array('x'=>116.438789,'y'=>39.9656),
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array('x'=>116.440298,'y'=>39.955839),
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array('x'=>116.42262, 'y'=>39.955673),
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array('x'=>116.378531,'y'=>39.954815),
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array('x'=>116.377704,'y'=>39.963941),
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array('x'=>116.368003,'y'=>39.96383),
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array('x'=>116.367679,'y'=>39.973341),
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array('x'=>116.361247,'y'=>39.973479),
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array('x'=>116.360529,'y'=>39.987025),
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array('x'=>116.37235, 'y'=>39.987716)
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),
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//三元桥
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6 => array(
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array('x'=>116.283706,'y'=>40.114137 ),
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array('x'=>116.354995,'y'=>40.121613 ),
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array('x'=>116.369081,'y'=>40.114661 ),
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array('x'=>116.37871, 'y'=>40.114772 ),
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array('x'=>116.380435,'y'=>40.106826 ),
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array('x'=>116.385897,'y'=>40.107543 ),
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array('x'=>116.389346,'y'=>40.07782 ),
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array('x'=>116.370949,'y'=>40.075998 ),
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array('x'=>116.37174, 'y'=>40.05739 ),
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array('x'=>116.325746,'y'=>40.042643 )
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),
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//团结湖
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7 => array(
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array('x'=>116.43189, 'y'=>39.955341),
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array('x'=>116.440316,'y'=>39.955396),
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array('x'=>116.438394,'y'=>39.977225),
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array('x'=>116.442849,'y'=>39.984116),
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array('x'=>116.467876,'y'=>39.969194),
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array('x'=>116.476608,'y'=>39.976797),
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array('x'=>116.494969,'y'=>39.963637),
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array('x'=>116.496999,'y'=>39.914179),
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array('x'=>116.433902,'y'=>39.914511)
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),
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//劲松店
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8 => array(
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array('x'=>116.4053, 'y'=>39.90632 ),
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array('x'=>116.495418,'y'=>39.911412 ),
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array('x'=>116.495418,'y'=>39.87709 ),
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array('x'=>116.491322,'y'=>39.854717 ),
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array('x'=>116.462432,'y'=>39.851892 ),
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array('x'=>116.421362,'y'=>39.852141 ),
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array('x'=>116.420895,'y'=>39.863412 ),
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array('x'=>116.406809,'y'=>39.863412 ),
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array('x'=>116.406881,'y'=>39.863357 )
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),
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//黄村店
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9 => array(
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array('x'=>116.280184,'y'=>39.776406 ),
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array('x'=>116.314751,'y'=>39.788383 ),
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array('x'=>116.337586,'y'=>39.805041 ),
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array('x'=>116.353252,'y'=>39.804487 ),
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array('x'=>116.356001,'y'=>39.794703 ),
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array('x'=>116.364912,'y'=>39.799138 ),
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array('x'=>116.367787,'y'=>39.783836 ),
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array('x'=>116.378495,'y'=>39.781507 ),
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array('x'=>116.383094,'y'=>39.766479 ),
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array('x'=>116.388628,'y'=>39.76426 ),
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array('x'=>116.387478,'y'=>39.749616 ),
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array('x'=>116.383238,'y'=>39.748507 ),
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array('x'=>116.385178,'y'=>39.728255 ),
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array('x'=>116.352408,'y'=>39.727423 ),
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array('x'=>116.335592,'y'=>39.705888 ),
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array('x'=>116.301726,'y'=>39.697727 )
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)
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);
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/*
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*** 配置文件（表示区域的三维数组）其内的点，必须按顺时针方向依次给出！
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*** 确定一点是否在一区域（多边形）内：
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1：过这一点(x0, y0)，画一水平线(y=y0)，与多边形的所有边进行交点判断。
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2：获取交点集（其中不含多边形的顶点）
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3：若该点（x0, y0）的左侧和右侧交点个数均为奇数个，则该点在区域（多边形）内。否则：不在。
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*** 返回结果：
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return === false : 点不在区域内
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return 0, 1, 2, 3 ... 点所在的区域编号（配置文件中的区域编号。）
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*** Author : Guojunzhou / Eric
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*** Main : php20141104@163.com
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*/
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class Area{
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// 一个表示区域的三维数组
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protected $config = null;
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// 包含每个区域的四边形
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protected $rectangles = null;
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// 每个区域（多边形）的所有边
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protected $lines = null;
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// 要判断的点的x, y坐标
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protected $_x = null;
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protected $_y = null;
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public function __construct($config){
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$this->config = $config;
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$this->initRectangles();
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$this->initLines();
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}
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/*
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获取包含每个配送区域的四边形
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*/
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private function initRectangles(){
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foreach ($this->config as $k => $v) {
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$this->rectangles[$k]['minX'] = $this->getMinXInEachConfig($k);
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$this->rectangles[$k]['minY'] = $this->getMinYInEachConfig($k);
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$this->rectangles[$k]['maxX'] = $this->getMaxXInEachConfig($k);
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$this->rectangles[$k]['maxY'] = $this->getMaxYInEachConfig($k);
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}
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}
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/*
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初始化每个区域（多边形）的边（线段：直线的一部分【限制x或者y坐标范围】）
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n 个顶点构成的多边形，有 n-1 条边
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*/
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private function initLines(){
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foreach ($this->config as $k => $v) {
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$pointNum = count($v); // 区域的顶点个数
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$lineNum = $pointNum - 1; // 区域的边条数
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for($i=0; $i<$lineNum; $i++){
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// y=kx+b : k
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if($this->config[$k][$i]['x'] - $this->config[$k][$i+1]['x'] == 0) $this->lines[$k][$i]['k'] = 0;
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else $this->lines[$k][$i]['k'] =
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($this->config[$k][$i]['y'] - $this->config[$k][$i+1]['y'])/($this->config[$k][$i]['x'] - $this->config[$k][$i+1]['x']);
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// y=kx+b : b
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$this->lines[$k][$i]['b'] = $this->config[$k][$i+1]['y'] - $this->lines[$k][$i]['k'] * $this->config[$k][$i+1]['x'];
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$this->lines[$k][$i]['lx'] = min($this->config[$k][$i]['x'], $this->config[$k][$i+1]['x']);
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$this->lines[$k][$i]['rx'] = max($this->config[$k][$i]['x'], $this->config[$k][$i+1]['x']);
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}
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$pointNum-=1;
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if($this->config[$k][$pointNum]['x'] - $this->config[$k][0]['x'] == 0) $this->lines[$k][$pointNum]['k'] = 0;
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else $this->lines[$k][$pointNum]['k'] =
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($this->config[$k][$pointNum]['y'] - $this->config[$k][0]['y'])/($this->config[$k][$pointNum]['x'] - $this->config[$k][0]['x']);
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// y=kx+b : b
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$this->lines[$k][$pointNum]['b'] = $this->config[$k][0]['y'] - $this->lines[$k][$pointNum]['k'] * $this->config[$k][0]['x'];
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$this->lines[$k][$pointNum]['lx'] = min($this->config[$k][$pointNum]['x'], $this->config[$k][0]['x']);
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$this->lines[$k][$pointNum]['rx'] = max($this->config[$k][$pointNum]['x'], $this->config[$k][0]['x']);
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}
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}
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/*
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获取一组坐标中，x坐标最小值
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*/
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private function getMinXInEachConfig($index){
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$minX = 200;
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foreach ($this->config[$index] as $k => $v) {
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if($v['x'] < $minX){
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$minX = $v['x'];
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}
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}
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return $minX;
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}
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/*
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获取一组坐标中，y坐标最小值
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*/
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private function getMinYInEachConfig($index){
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$minY = 200;
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foreach ($this->config[$index] as $k => $v) {
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if($v['y'] < $minY){
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$minY = $v['y'];
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}
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}
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return $minY;
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}
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/*
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获取一组坐标中，x坐标最大值
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*/
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public function getMaxXInEachConfig($index){
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$maxX = 0;
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foreach ($this->config[$index] as $k => $v) {
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if($v['x'] > $maxX){
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$maxX = $v['x'];
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}
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}
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return $maxX;
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}
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/*
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获取一组坐标中，y坐标最大值
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*/
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public function getMaxYInEachConfig($index){
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$maxY = 0;
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foreach ($this->config[$index] as $k => $v) {
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if($v['y'] > $maxY){
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$maxY = $v['y'];
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}
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}
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return $maxY;
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}
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/*
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获取 y=y0 与特定区域的所有边的交点，并去除和顶点重复的，再将交点分为左和右两部分
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*/
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private function getCrossPointInCertainConfig($index){
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$crossPoint = null;
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foreach ($this->lines[$index] as $k => $v) {
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if($v['k'] == 0) return true;
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$x0 = ($this->_y - $v['b']) / $v['k']; // 交点x坐标
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if($x0 == $this->_x) return true; // 点在边上
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if($x0 > $v['lx'] && $x0 < $v['rx']){
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if($x0 < $this->_x) $crossPoint['left'][] = $x0;
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if($x0 > $this->_x) $crossPoint['right'][] = $x0;
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}
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}
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return $crossPoint;
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}
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/*
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检测一个点，是否在区域内
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返回结果：
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return === false : 点不在区域内
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return 0, 1, 2, 3 ... 点所在的区域编号（配置文件中的区域编号。）
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*/
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public function checkPoint($x, $y){
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$this->_x = $x;
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$this->_y = $y;
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$contain = null;
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foreach ($this->rectangles as $k => $v) {
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if($x > $v['maxX'] || $x < $v['minX'] || $y > $v['maxY'] || $y < $v['minY']){
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continue;
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}else{
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$contain = $k;
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break;
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}
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}
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if($contain === null) return false;
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$crossPoint = $this->getCrossPointInCertainConfig($contain);
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if($crossPoint === true) return $contain;
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if(count($crossPoint['left'])%2 == 1 && count($crossPoint['right'])%2 == 1) return $contain;
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return false;
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}
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}
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$area = new Area($area);
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var_dump($area->checkPoint(116.531748,39.944229));
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?>
https://blog.csdn.net/u014290054/article/details/47418065
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