niubc's profile - activity

I am trying to change log file to bt/ot file. link text.After reading this page, I write a .log file to test .But there are problems when I use graph2tree to change graph file into bt file .

NODE 0.217 -0.074 0.713 -0.0279 -0.0293 0

4.724 20.891 15.646

4.323 20.928 15.505

4.819 20.474 15.384

5.016 20.194 15.264

6.068 19.496 15.199

6.975 18.906 15.15

7.326 18.606 15.08

8.156 18.103 15.064

8.87 17.68 15.055

Where is the mistake made by me on earth?

I wang to build a simulation environment of underwater robot(or AUV) to test my SLAM algorithms, but many things in ROS can't be found, such as sonar. I konw UWSIM, but there is something is wrong while installing it.

Any good suggestions?

ROS operates in the ENU Coordinate system(East-North-Up). In the algorithms for AUV(Autonomous Underwater Vehicles), I need North-East-Down Coordinate system. What should I do? Change TF or what?

I'm a beginner. I want to use 2D Lidar to finish 3D SLAM! Generally, we lay the 2D Lidar on a car. Now I want to place the 2D Lidar on its side so it can scan vertical plane instead of horizontal plane. But I didn't find 3D SLAM package.I realized that slam_gmapping can only build 2D map. What should I do? Using octomap?

I'm a beginner. I'm trying to use costmap_2d package to build a grid map. Before this I used slam_gmapping to finish the job, by writing this node to launch file, but in didn't work for costmap_2d. I noticed that there are three nodes in costmap_2d package, so which one should I choose? How should I do to use it to build a map?

Thank you so much ！！！

I'm a beginner. I'm trying to use costmap_2d package to build a grid map. Before this I used slam_gmapping to finish the job, by writing this node to launch file, but in didn't work for costmap_2d. I noticed that there are three nodes in costmap_2d package, so which one should I choose? How should I do to use it to build a map?

I have learned ros for two weeks and I konw how to create a package. I can write some programs on windows.Now I want write nodes on my own, but I find I can't debug programs, which is very different from windows programs. I am used to press "build" button to know if there are mistakes in my program.Maybe some tools can finish this work?

I have learned ros for two weeks and I know how to create a package. I can write some programs on windows. Now I want write nodes on my own, but I find I can't debug programs, which is very different from windows programs. I am used to press "build" button to know if there are mistakes in my program. Maybe some tools can finish this work?