fix periodCloud size 0

CMakeLists.txt.user

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.5.2, 2022-07-04T15:04:40. -->
+<!-- Written by QtCreator 4.5.2, 2023-02-02T11:19:58. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

apps/function/multi_traj_functions.cpp

@@ -195,6 +195,10 @@ void filterByPosition(
             auto period = oneRet.periods.at(periodIndex);
             PointCloudExport periodCloud =
                     getCloudFromPeriod(pointClouds.at(oneRet.index), period);
+            LOG(INFO) << "periodCloud.size(): " << periodCloud.size();
+            if(0 == periodCloud.size()){
+                continue;
+            }
             float resolution = 5.f;
             pcl::octree::OctreePointCloudSearch<PointExport> octree(resolution);
             octree.setInputCloud(boost::make_shared<PointCloudExport>(periodCloud));