test mergemulti traj at one place

CMakeLists.txt.user

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.5.2, 2022-03-17T17:17:26. -->
+<!-- Written by QtCreator 4.5.2, 2022-04-19T14:41:36. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

apps/function/multi_traj_functions.cpp

@@ -199,7 +199,12 @@ vector<pair<string, vector<pair<uint64_t, uint64_t>>>> crossFilter(
                 auto iter = targetPeriods.find(targetIndex + 1);    //first is query!plus 1!
                 if(iter != targetPeriods.end()){
                     uint64_t end = octree.getInputCloud()->at(result_index).info;
-                    iter->second.second = end;;
+                    if(end > iter->second.first){
+                        iter->second.second = end;
+                    }else{
+                        iter->second.second = iter->second.first;
+                        iter->second.first = end;
+                    }
                 }
             }
         }