utkarshjp7's profile - activity

Dynamic number of topics for message_filters.TimeSynchronizer I want to create a time syncronizer for n topics. Is the

Dynamic number of topics for message_filters.TimeSynchronizer I want to create a time syncronizer for n topics. Is the

Dynamic number of subscribers for message_filters.TimeSynchronizer I want to create a time syncronizer for n topics. I

Dynamic number of subscribers for message_filters.TimeSynchronizer I want to create a time syncronizer for n topics. I

Dynamic number of subscribers for message_filters.TimeSynchronizer I want to create a time syncronizer for n topics. I

How to save a snapshot of entire tf tree in python? I want to be able to save the current state of tf tree in python so

How to save entire tf tree in python? I want to be able to save the current state of tf tree in python so that I can loo

I want to be able to save the current state of tf tree in python so that I can lookup the desired transforms from the saved tf tree at a later point.

view_frames saves the tree as pdf. I want to save it in some format so that I can read from it programatically.

How to save entire tf tree in python? I want to be able to save the current state of tf tree in python so that I can loo

How to save entire tf tree in python? I want to be able to save the current state of tf tree in python so that I can loo

Add diagnostic_updater in your CMakeLists.txt find_package(catkin REQUIRED COMPONENTS diagnostic_updater )

Yes. I was running rviz on a different machine. The problem was that on my rviz machine ROS_HOSTNAME parameter was point

were you able to solve the issue? I am getting the exact same error.

I am setting up ros navigation stack on a robot that is not compatible with navigation stack out of the box. I am not using a static map for the navigation instead i have set the rolling_window parameters true for both global and local cost maps.
(I am not allowed to attach images so i will try my best to describe my situation in words.)

My rviz Screen shows the following objects

• local and global costmaps
• robot footprint.
• "2D Nav Goal" tool is pointing to /move_base_simple/goal.

$ rostopic info /move_base_simple/goal

Publishers: * /rviz_1478194899883990323 ( http://172.20.41.90:44168/ )

Subscribers: * /move_base ( http://172.20.41.90:46055/ )

$ rostopic info /cmd_vel

Publishers: * /move_base ( http://172.20.41.90:46055/ )

Subscribers: * /beam/beam ( http://172.20.41.123:43113/ )

• When I set a goal in rviz using "2D Nav Goal" tool, the terminal window of rviz shows the following information.

INFO [1478195397.235377567]: Setting goal: Frame:base_link, Position(0.558, -0.039, 0.000), Orientation(0.000, 0.000, 0.000, 1.000) = Angle: 0.000

In another terminal window i have following command running "rostopic echo /move_base_simple/goal"

In another terminal window i have following command running "rostopic echo /cmd_vel"

My problem is that when I set a goal in rviz screen i do not see anything published to /move_base_simple/goal or /cmd_vel topics.

I have tried setting the NDEBUG flag explicitly and also set the build type to None, but no improvements. Do you know exactly how does the navigation stack packages get built? using catkin_make or any other tool?

I think -DCMAKE_BUILD_TYPE=Release boils down to -O3 and -DNDEBUG.

I need to modify the costmap_2d source code for my project. I downloaded the latest stable navigation stack source from github (v1.12.13 as of today). I copied the source code (all the navigation packages) into my workspace and compiled it by executing catkin_make -DCMAKE_BUILD_TYPE=Release.

However, when I give a goal to robot it gives me warnings Map loop missed its desired rate of ..., and robot's movement is very slow and unstable. (I do not get any warnings before giving the goal). The performance of navigation stack in general became very slow after I installed it from source.

I do not get any warning and the robot moves smoothly if I remove the navigation packages from my catkin workspace and use the packages that came with ros installation (which are also v1.12.13).

One difference between source compiled executables and the original executables (one that came with ros installation) is as follow.

file command gives different output:

Source installed executables: ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=ea5a688fc0b62bec71a5a6e7ac53c4a7bb209916, not stripped

Original executables (ones that come with ros installation): ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=138405beffc40400b5633927fa54e64062834c63, stripped

Also, source compiled executables have bigger size than the corresponding original executables.

I am using ros indigo with ubuntu 14.04. Let me know if you need more information.

For navigation, the base_link should be placed at the rotational center of the robot.

My robot is a rectangular shaped robot, whose rotation center is at the front.

How do I change the location of "base_link" from its physical center to its front?