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2019-12-20 08:31:07 -0500 received badge  Nice Answer (source)
2015-09-22 12:51:37 -0500 commented question Problem creating Ros package and use library.a

Is this question not a duplicate of http://answers.ros.org/question/21804... ?

2015-09-22 12:48:11 -0500 answered a question Export a CMake project into Catkin(ROS)

Could you pose a specific question?

As for how to create package, try http://wiki.ros.org/catkin/Tutorials/...

You should be able to make additions to your existing CMakeLists.txt file to add support for building with ROS. Consult http://wiki.ros.org/catkin/CMakeLists...

If you want to provide the capability to build with and without ROS in the same CMakeLists.txt, try switching based on the definition of CATKIN_ENV, e.g.,

if (CATKIN_ENV)
  message (STATUS "Building for ROS")
  # ...
else (CATKIN_ENV)
  message (STATUS "Building without catkin")
  # ...
endif (CATKIN_ENV)
2015-03-30 16:47:52 -0500 commented question ERROR: Laser has to be mounted planar

Have you also tried args="0 0 1 0 0 0 base_link camera_link 100"? (Alternative format for static_transform_publisher.)

2015-03-30 16:47:52 -0500 received badge  Commentator
2015-03-02 00:23:06 -0500 commented question depthimage_to_laserscan

Could you be more specific? E.g., what commands did you try?

2015-02-28 15:34:23 -0500 commented answer Python rospy Script doesn't end running

Yes, by default Ctrl-C causes an interruption signal (SIGINT ) that is caught by rospy, which then starts a shutdown procedure. You can use different signal handlers or add hooks if you want. Consult http://wiki.ros.org/rospy/Overview/In...

2015-02-28 15:13:23 -0500 commented question Is there a guide to cross-compiling ROS for ARM (BBB)?
2015-02-28 08:54:00 -0500 received badge  Nice Answer (source)
2015-02-27 22:19:25 -0500 answered a question Running robot_pose_ekf and amcl

One possibility is that there are interfering published transforms. Did you try dumping the tf graph both with and without amcl running? E.g., rosrun tf view_frames. To debug this, you could try spawning the amcl with modified odom_frame_id, base_frame_id, and global_frame_id parameters. Confer http://wiki.ros.org/amcl#Parameters (near the bottom of the page).

You wrote that robot_pose_ekf is required by leg_detector. However, there is no indication of this in the package description. It is required to specify a reference frame (parameter fixed_frame), which could be provided by multiple packages, e.g., robot_pose_ekf or amcl.

2015-02-27 22:04:56 -0500 answered a question Python rospy Script doesn't end running

You are not using rospy.is_shutdown() correctly. Try moving it into the condition of the while-loop. Compare with the example in the tutorial at http://wiki.ros.org/ROS/Tutorials/Wri...

2015-02-19 17:06:28 -0500 commented question Questions about how to let turtlebot move in RViz

You should add more detail. Otherwise, there are many candidate explanations. Also explain what you have already tried. E.g., have you tried running

rostopic echo /cmd_vel

in a separate terminal in order to watch for messages?

2015-02-19 17:03:09 -0500 answered a question process crashes, no log file where it says

Did you try running the process through a debugger? E.g, if you are using a roslaunch file, try adding gdb to the launch-prefix. http://wiki.ros.org/roslaunch/Tutoria...

2015-02-17 00:02:27 -0500 received badge  Enthusiast
2015-02-16 16:35:44 -0500 commented question install TurtleBot packages on Raspberry Pi

The link to instructions that you gave is invalid.

2015-02-16 13:02:47 -0500 commented question Help Publishing

Should it be rospy.spin()?

As you have it currently, you are not actually calling rospy.spin() in your listener function, which could explain the "not callable" error.

2015-02-15 12:05:59 -0500 commented question Query for robotic movement

This question seems inappropriate. Please consult http://wiki.ros.org/Support#Guideline...

2015-02-14 23:24:29 -0500 answered a question can't run gmapping scan

The rosrun gmapping command is not intended to finish. It is waiting for laser scan messages and will not begin producing a map estimate until you proceed to the next step of the tutorial (rosbag play...).

2015-01-03 03:56:10 -0500 received badge  Enlightened (source)
2014-11-06 17:20:43 -0500 commented question mobile_base topics don't apper on turtlebot_gazebo

Can you run kobuki_playground.launch of the kobuki_gazebo package?

2014-05-21 10:01:36 -0500 commented answer Any one can create a bag file for me?

What do you mean by "almost accurate"? If you do not want perfect position tracking, then you can add noise to it. Also note that you can run Gazebo headless, i.e., without the UI, which should make it workable for slow computers.

2014-05-17 20:29:33 -0500 received badge  Critic (source)
2014-05-17 20:13:02 -0500 answered a question Any one can create a bag file for me?

Would it not suffice to obtain the data from a Gazebo simulation? Try running rosbag while using the turtlebot_simulator package.

2014-05-16 05:51:47 -0500 commented question Problem positioning map

You should give more details about what you are trying. Note that the map in Stage is not really a map in the sense of being some model or reference used by the robot, but rather it is the ground truth used by Stage for simulation, and your robot may not have direct access to it.

2014-05-15 18:45:57 -0500 answered a question Problem positioning map

If you are using map_server to publish the map, then you can change the location of the map origin in the corresponding YAML file.

2014-05-15 11:06:48 -0500 answered a question Slam_gmapping prob with lidar and image data

Are both laser scan nodes publishing to the same topic? Also, are they being published as having distinct transforms? For the latter, try using view_frames of the tf package to verify that you see transforms for both laser scan sources to base_link, as described on the gmapping wiki page.

2014-05-13 20:05:50 -0500 received badge  Editor (source)
2014-05-13 19:58:33 -0500 answered a question Is there a 3DSLAM package for ros-hydro?

You should state your problem more precisely.

Did you consider OctoMap or RGBDSLAM ?

You may find something relevant at http://openslam.org/ though it may not yet be available as a ROS package.

2014-03-17 13:44:39 -0500 received badge  Good Answer (source)
2014-03-17 13:23:49 -0500 received badge  Nice Answer (source)
2014-03-17 09:40:35 -0500 answered a question error opening file: play

delete "play from args="...".

The rosbag package provides a program named "play" which you run as a node via the type="play" part of <node>. (Your usage here is reminiscent of the command-line tool rosbag.)

2013-10-29 09:25:31 -0500 received badge  Teacher