point cloud concatenate

首先把代码附上：

// cancatenatepcd.cpp : 定义控制台应用程序的入口点。

//
#include "stdafx.h"
#include <iostream>
#include <pcl/io/pcd_io.h>
#include <pcl/point_types.h>


int
main(int argc,char** argv)
{
if(argc!=2)
{
std::cerr<<"please specify command line arg '-f' or '-p'"<<std::endl;
exit(0);
}
pcl::PointCloud<pcl::PointXYZ> cloud_a,cloud_b,cloud_c;
pcl::PointCloud<pcl::Normal> n_cloud_b;
pcl::PointCloud<pcl::PointNormal> p_n_cloud_c;
// 创建点云
cloud_a.width=5;
cloud_a.height=cloud_b.height=n_cloud_b.height=1;
cloud_a.points.resize(cloud_a.width*cloud_a.height);
if(strcmp(argv[1],"-p")==0)
{
cloud_b.width=3;
cloud_b.points.resize(cloud_b.width*cloud_b.height);
}
else{
n_cloud_b.width=5;
n_cloud_b.points.resize(n_cloud_b.width*n_cloud_b.height);
}
for(size_t i=0;i<cloud_a.points.size();++i)
{
cloud_a.points[i].x=1024*rand()/(RAND_MAX+1.0f);
cloud_a.points[i].y=1024*rand()/(RAND_MAX+1.0f);
cloud_a.points[i].z=1024*rand()/(RAND_MAX+1.0f);
}
if(strcmp(argv[1],"-p")==0)
for(size_t i=0;i<cloud_b.points.size();++i)
{
cloud_b.points[i].x=1024*rand()/(RAND_MAX+1.0f);
cloud_b.points[i].y=1024*rand()/(RAND_MAX+1.0f);
cloud_b.points[i].z=1024*rand()/(RAND_MAX+1.0f);
}
else
for(size_t i=0;i<n_cloud_b.points.size();++i)
{
n_cloud_b.points[i].normal[0]=1024*rand()/(RAND_MAX+1.0f);
n_cloud_b.points[i].normal[1]=1024*rand()/(RAND_MAX+1.0f);
n_cloud_b.points[i].normal[2]=1024*rand()/(RAND_MAX+1.0f);
}
std::cerr<<"Cloud A: "<<std::endl;
for(size_t i=0;i<cloud_a.points.size();++i)
std::cerr<<"    "<<cloud_a.points[i].x<<" "<<cloud_a.points[i].y<<" "<<cloud_a.points[i].z<<std::endl;


std::cerr<<"Cloud B: "<<std::endl;
if(strcmp(argv[1],"-p")==0)
for(size_t i=0;i<cloud_b.points.size();++i)
std::cerr<<"    "<<cloud_b.points[i].x<<" "<<cloud_b.points[i].y<<" "<<cloud_b.points[i].z<<std::endl;
else
for(size_t i=0;i<n_cloud_b.points.size();++i)
std::cerr<<"    "<<n_cloud_b.points[i].normal[0]<<" "<<n_cloud_b.points[i].normal[1]<<" "<<n_cloud_b.points[i].normal[2]<<std::endl;


//拷贝点云数据
if(strcmp(argv[1],"-p")==0)
{
cloud_c=cloud_a;
cloud_c+=cloud_b;
std::cerr<<"Cloud C: "<<std::endl;
for(size_t i=0;i<cloud_c.points.size();++i)
std::cerr<<"    "<<cloud_c.points[i].x<<" "<<cloud_c.points[i].y<<" "<<cloud_c.points[i].z<<" "<<std::endl;
}
else
{
pcl::concatenateFields(cloud_a,n_cloud_b,p_n_cloud_c);
std::cerr<<"Cloud C: "<<std::endl;
for(size_t i=0;i<p_n_cloud_c.points.size();++i)
std::cerr<<"    "<<
p_n_cloud_c.points[i].x<<" "<<p_n_cloud_c.points[i].y<<" "<<p_n_cloud_c.points[i].z<<" "<<
p_n_cloud_c.points[i].normal[0]<<" "<<p_n_cloud_c.points[i].normal[1]<<" "<<p_n_cloud_c.points[i].normal[2]<<std::endl;
}
return(0);
}

pcl::concatenateFields(cloud_a,n_cloud_b,p_n_cloud_c);  这里通过把cloud_a和n_cloud_b字段连接起来，结果如下图1：

cloud_c=cloud_a;

cloud_c+=cloud_b; 连接点云，结果如下图2：