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背景：interactive_slam是一款可用于离线优化点云地图算法。部署安装容易出问题，这里记录一下。

一、安装基本流程

绝大部分跟着readme走，g2o安装使用apt安装

interactive_slam depends on the following libraries:GL3W
GLFW
Dear ImGui
portable-file-dialog
OpenMP
PCL
g2o
# for ROS noetic
sudo apt-get install libglm-dev libglfw3-dev
sudo apt-get install libsuitesparse-dev libeigen3-dev
sudo apt-get install ros-noetic-geodesy ros-noetic-pcl-ros ros-noetic-nmea-msgs 
# Install g2o from original source code 本人使用的是apt安装g2o，在踩坑记录中会说到
git clone https://github.com/RainerKuemmerle/g2o.git
cd g2o
mkdir build 
cd build
cmake ../
make
sudo make install
# Install Ceres Library
git clone https://ceres-solver.googlesource.com/ceres-solver
# Install all dependencies
# CMake
sudo apt-get install cmake
# google-glog + gflags
sudo apt-get install libgoogle-glog-dev libgflags-dev
# Use ATLAS for BLAS & LAPACK
sudo apt-get install libatlas-base-dev
# Eigen3
sudo apt-get install libeigen3-dev
cd ~/catkin_ws/src
git clone https://github.com/koide3/ndt_omp
git clone https://github.com/koide3/hdl_graph_slam
git clone https://github.com/koide3/odometry_saver
git clone https://github.com/SMRT-AIST/fast_gicp --recursive
git clone https://github.com/SMRT-AIST/interactive_slam --recursivecd ~/catkin_ws
catkin_make -DCMAKE_BUILD_TYPE=Release

二、踩坑记录

1、编译出现g2o报错

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
G2O_CORE_LIBRARYlinked by target "hdl_graph_slam_nodelet" in directory /home/ylh/code_ws/interactiveSlam_ws/src/hdl_graph_slam
G2O_SOLVER_CHOLMODlinked by target "hdl_graph_slam_nodelet" in directory /home/ylh/code_ws/interactiveSlam_ws/src/hdl_graph_slam
G2O_SOLVER_CSPARSElinked by target "hdl_graph_slam_nodelet" in directory /home/ylh/code_ws/interactiveSlam_ws/src/hdl_graph_slam
G2O_SOLVER_PCGlinked by target "hdl_graph_slam_nodelet" in directory /home/ylh/code_ws/interactiveSlam_ws/src/hdl_graph_slam
G2O_STUFF_LIBRARYlinked by target "hdl_graph_slam_nodelet" in directory /home/ylh/code_ws/interactiveSlam_ws/src/hdl_graph_slam
G2O_TYPES_DATAlinked by target "hdl_graph_slam_nodelet" in directory /home/ylh/code_ws/interactiveSlam_ws/src/hdl_graph_slam
G2O_TYPES_SLAM3Dlinked by target "hdl_graph_slam_nodelet" in directory /home/ylh/code_ws/interactiveSlam_ws/src/hdl_graph_slam
G2O_TYPES_SLAM3D_ADDONSlinked by target "hdl_graph_slam_nodelet" in directory /home/ylh/code_ws/interactiveSlam_ws/src/hdl_graph_slam

原因：没有找到对应的g2o版本
解决方式

sudo apt install ros-noetic-libg2o

参考

2、提示第三方依赖找不到

interactive_slam/thirdparty/imgui 等找不到
原因：子库没有正常拉取
在interactive_slam目录下运行

git submodule update --init --recursive

若出现错误，多运行几次

3、工作空间一次性编译混乱报错

原来方式

catkin_make -DCMAKE_BUILD_TYPE=Release

使用编译方式，单个包编译

catkin_make -DCATKIN_WHITELIST_PACKAGES="odometry_saver"
catkin_make -DCATKIN_WHITELIST_PACKAGES="ndt_omp"
catkin_make -DCATKIN_WHITELIST_PACKAGES="fast_gicp"
catkin_make -DCATKIN_WHITELIST_PACKAGES="hdl_graph_slam"
catkin_make -DCATKIN_WHITELIST_PACKAGES="interactive_slam"

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好记性不如烂笔头
积跬步期千里
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