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2015-04-26 17:22:11 -0500 asked a question gazebo 5.0 bug

I was trying to use building editor to build the map, but I can't choose the picture in the dialog, since it shows nothing in the dialog, what should I do?

2015-04-23 16:40:15 -0500 asked a question Gazebo map building editor

It seems there is some bugs of Gazebo, when I import pictures I cannot see anything in the dialog, when I save it the same thing happens.

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2015-04-21 21:23:29 -0500 asked a question Question about turtlebot_stage package

I have followed the tutorial and test turtlebot_in_stage.launch and it worked fine with maze.world. And now I want to test robopark_plan.world, then what I should do? I t

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2015-04-18 15:19:41 -0500 answered a question Multiple robots simulation and navigation

Hi, I met a problem when I test your launch file,

  • IOError: [Errno 2] No such file or directory: '/opt/ros/indigo/share/turtlebot_description/urdf/turtlebot.urdf.xacro' while processing /home/yunfeilu330/catkin_ws/src/beginner_tutorials/launch/robots.launch: Invalid tag: Cannot load command parameter [robot_description]: command [/opt/ros/indigo/share/xacro/xacro.py /opt/ros/indigo/share/turtlebot_description/urdf/turtlebot.urdf.xacro] returned with code [1].

It seems that I don't have turtlebot.urdf.xacro, then what should I use to instead?

2015-04-18 13:16:25 -0500 asked a question social Multi-robot navigation

I have a project about social multi-robot navigation, but I have totally no idea how to do it. I have a map pdf, I want to use gazebo to simulate the environment, and use turtlebot to do the simulation, can someone give me some guide, I'm totally new .....

2015-04-17 12:19:43 -0500 asked a question using roslaunch to run turtlebot_rviz launchers view_robot.launch

Gazebo didn't show on the screen, there is just rviz

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2015-02-04 18:25:32 -0500 commented answer ROSTutorialsWritingPublisherSubscriber(c++)

Yeah,I'd like to help other new users, I'm going to do it right now

2015-02-04 12:13:00 -0500 commented answer ROSTutorialsWritingPublisherSubscriber(c++)

sorry, I don't know how to attach the code, but some line in the CMakelist.txt should be commented out.

2015-02-04 12:12:02 -0500 commented answer ROSTutorialsWritingPublisherSubscriber(c++)

Oh my god, it finally worked, the Cmakelists.txt file has something wrong

 # add_message_files(FILES Num.msg)
# add_service_files(FILES AddTwoInts.srv)
# generate_messages(DEPENDENCIES std_msgs)
2015-02-04 09:27:20 -0500 commented answer ROSTutorialsWritingPublisherSubscriber(c++)

No, my lib only has pkgconfig

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2015-02-03 15:15:30 -0500 asked a question ROSTutorialsWritingPublisherSubscriber(c++)

I have some questions when I go through this tutorial. When I finished 1.1 and 1.2, then in the 1.3 I try to change the content in the CMakeLists.txt, then it's supposed to create two executables, talker and listener, which by default will go into package directory of your devel space, located by default at ~/catkin_ws/devel/lib/share/, however there isn't share in lib and there are no executables.

Hello everyone, after I asked for some people's help finally I solved this problem, first of all, something was wrong in the tutorial that is there does not exist ~/catkin_ws/devel/lib/share/, instead we have devel/lib/beginner_tutorials (which is my package name). But before we get two executable in beginner_tutorials, the last thing we should do is to change some content in Cmakelists.txt, the Cmakelists.txt in the tutorial also has something wrong.
In the tutorial:

# %Tag(FULLTEXT)%
cmake_minimum_required(VERSION 2.8.3)
project(beginner_tutorials)

## Find catkin and any catkin packages
find_package(catkin REQUIRED COMPONENTS roscpp rospy std_msgs genmsg)

## Declare ROS messages and services
add_message_files(FILES Num.msg)
add_service_files(FILES AddTwoInts.srv)

## Generate added messages and services
generate_messages(DEPENDENCIES std_msgs)

## Declare a catkin package
catkin_package()

## Build talker and listener
include_directories(include ${catkin_INCLUDE_DIRS})

add_executable(talker src/talker.cpp)
target_link_libraries(talker ${catkin_LIBRARIES})
add_dependencies(talker beginner_tutorials_generate_messages_cpp)

add_executable(listener src/listener.cpp)
target_link_libraries(listener ${catkin_LIBRARIES})
add_dependencies(listener beginner_tutorials_generate_messages_cpp)

# %EndTag(FULLTEXT)%

we should comment out

add_message_files(FILES Num.msg)
add_service_files(FILES AddTwoInts.srv)

this two line, which means it should be like this: #add.......

if you don't do this, you will find something wrong when you try to use catkin_make

2015-02-03 15:09:16 -0500 commented question Tutorial Writing a simple publisher and subscriber

1 cmake_minimum_required(VERSION 2.8.3) 2 project(beginner_tutorials) 3 4 ## Find catkin and any catkin packages 5 find_package(catkin REQUIRED COMPONENTS roscpp rospy std_msgs genmsg) 6 7 ## Declare ROS messages and services 8 add_message_files(FILES Num.msg) 9 add_service

2015-02-03 11:04:04 -0500 commented question Tutorial Writing a simple publisher and subscriber

I'm sorry, that was not comment, it's content, I changed the content in the cmakelist.txt just like the tutorial said, and it should be create two executable file in /devel/lib/share, however I cannot find these two executable file even share

2015-02-03 10:02:28 -0500 asked a question Tutorial Writing a simple publisher and subscriber

I have followed the tutorial to change the comment in Cmakelist.txt, but there are no executive file created in devel/lib/share, actually I don't have lib/share