本文介绍了地图api:检查标记是否落在多段线的左侧或右侧的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 我目前正在开发一个使用maps API的应用程序,我有一个多段线,开始为LatLnt,最后以LatLng 2结束,创建一条直线。如果我的Marker接近这个折线,我该如何判断这个折线是在折线的左边还是右边? 有没有API utils处理这样的几何计算?解决方案你有坐标L0,L1作为起点和终点的直线和标记坐标P. 找到方向L0-L1和L0-P的方位角(标题,轴承) AL =方位角(L0,L1) AP =方位角(L0,P) 并找出它们的差异 DA = AP - AL 如果DA DA = DA + 360 如果DA 左边其他右边 I'm currently developing an app using maps API, I have a polyline that is that start as LatLnt one and ends at LatLng two creating a straight line. If I have a Marker that falls somewhere close to this polyline how would I tell if the marker is to the left or to the right of the polyline?Are there any API utils that handles such geometric calculations? 解决方案 You have coordinates L0, L1 for starting and ending points of line and marker coordinate P.Find azimuths for directions L0-L1 and L0-P (heading, bearing)AL = Azimuth(L0,L1)AP = Azimuth(L0,P)and find their differenceDA = AP - ALif DA < 0 then DA = DA + 360if DA < 180 then left sideelse right side 这篇关于地图api:检查标记是否落在多段线的左侧或右侧的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!
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