PCL KdTree 最近邻 点 间距

    #include <pcl/point_types.h>
    #include <pcl/kdtree/kdtree_flann.h>
    #include <iostream>
    #include <vector>
    #include <ctime>
    #include <math.h>
    
    int
    main(int argc, char** argv)
    {
    	pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>());
    
    
    	cloud->width = 100;
    	cloud->height = 1;
    
    	cloud->resize(cloud->width * cloud->height);
    
    	for (std::size_t i = 0; i < cloud->size(); i++)
    	{
    		(*cloud)[i].x = 1024 * rand() / (RAND_MAX + 1.0f);
    		(*cloud)[i].y = 1024 * rand() / (RAND_MAX + 1.0f);