Cloud_viewer示例错误

Question

我是PCL库的新手，我正在尝试编译一个简单的示例。

    #include <pcl/visualization/cloud_viewer.h>
#include <iostream>
#include <pcl/io/io.h>
#include <pcl/io/pcd_io.h>

int user_data;

void 
viewerOneOff (pcl::visualization::PCLVisualizer& viewer)
{
    viewer.setBackgroundColor (1.0, 0.5, 1.0);
    pcl::PointXYZ o;
    o.x = 1.0;
    o.y = 0;
    o.z = 0;
    viewer.addSphere (o, 0.25, "sphere", 0);
    std::cout << "i only run once" << std::endl;

}

void 
viewerPsycho (pcl::visualization::PCLVisualizer& viewer)
{
    static unsigned count = 0;
    std::stringstream ss;
    ss << "Once per viewer loop: " << count++;
    viewer.removeShape ("text", 0);
    viewer.addText (ss.str(), 200, 300, "text", 0);

    //FIXME: possible race condition here:
    user_data++;
}

int 
main ()
{
    pcl::PointCloud<pcl::PointXYZRGBA>::Ptr cloud (new pcl::PointCloud<pcl::PointXYZRGBA>);
   // pcl::io::loadPCDFile ("my_point_cloud.pcd", *cloud);

    pcl::visualization::CloudViewer viewer("Cloud Viewer");
    //////////////////

    //////////////////

    //blocks until the cloud is actually rendered
    viewer.showCloud(cloud);

    //use the following functions to get access to the underlying more advanced/powerful
    //PCLVisualizer

    //This will only get called once
    viewer.runOnVisualizationThreadOnce (viewerOneOff);


    //This will get called once per visualization iteration
    viewer.runOnVisualizationThread (viewerPsycho);
    while (!viewer.wasStopped ())
    {
    //you can also do cool processing here
    //FIXME: Note that this is running in a separate thread from viewerPsycho
    //and you should guard against race conditions yourself...
    user_data++;
    }
    return 0;
}

当我调试它时，出现下一个错误：

调试错误。 Abort（）已被调用。

并且在附带的控制台中：

断言失败，mlf_> = minimun_max_loas因数，文件C：\ dev \ boost_1_55_0 \ boost \ unordered \ detail \ table.hpp，第323行

请帮助

Answer 1

“云”是指针类型。需要传递它指向的内容：

viewer.showCloud(*cloud);