在KML多边形中指向-C/C ++代码 [英] Point in KML Polygon - C / C++ code

问题描述

我正在寻找C或C ++代码来识别点(坐标)是否位于KML多边形内.

I am looking for C or C++ code to identify whether the point (a co-ordinate) lies inside a KML polygon or not.

我已经搜索过，但是我所得到的只是可以实现相同效果的javascript(谷歌地图api).我什至不能直接移植它，因为我有一个稍微修改的要求:

I have searched but all I got is javascript (google maps apis) which can achieve the same. I cannot even port it directly because I have a slight modified requirement:

1. 确定给定的坐标是否位于KML的多边形内(代码也应排除多边形中的孔！).
2. 如果该点在范围之外，则通知呼叫者到最近的多边形边缘的距离.

据我研究，第二点还没有实现.我想知道如何在C或C ++中实现这一目标吗?还是我错过了搜索任何现有资源的机会?

As far as I have researched, the 2nd point has not been achieved anywhere yet. I would want to know how to achieve this in C or C++? Or, have I missed searching any existing sources?

想要输入.

推荐答案

扩展了开源libkml C ++库，并在其中实现了多边形.这是源代码:

Extended the opensource libkml C++ library and implemented point in polygon in it. This is the source code:

https://github.com/gumdal/libkml-pointinpolygon

我要在上面的问题中达到第二点.尽管如此，任何线索都将不胜感激:)

I am yet to achieve the 2nd point in my question above. Any leads in that matter would be appreciated though :)

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