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2015-03-10 20:05:17 -0500 | commented answer | image_view no data received Can you provide your "rostopic list" command output and "rosnode info image_proc" command output? Those should answer what is going wrong. |
2015-03-10 01:57:03 -0500 | commented answer | image_view no data received Because, as I mentioned, no such topic is being published. Your Xtion drivers are not publishing those topics so there is nothing to subscribe in either Rviz or ImageView. Perhaps you can share some info about how you run the Xtion and why you think that the topics should exist and I'll try to help |
2015-03-10 01:22:11 -0500 | answered a question | image_view no data received That warning indicates that nothing is being published to the /camera/rgb/image_color topic, but that the image_view has successfully subscribed to it. You should verify that an image from your xtion is indeed published to that topic. To do that, you can use "rostopic hz /camera/rgb/image_color" command. This will output the rate at which images are being published to that topic. If you find that there is nothing being published, use either "rostopic list" or "rosrun rqt_graph rqt_graph", to figure out the correct topic name that you should use. Otherwise you can refer to RViz, under Display types - check which topic you're subscribed to for your Image and check for spelling mistakes. |
2015-03-04 22:24:12 -0500 | answered a question | How to publish single sensor_msgs/LaserScan over ROS from two sick_tim sensor As mentioned by Lorenz on this thread: http://answers.ros.org/question/37794... It seems that you can simply publish on the same topic from multiple laser scan sources, since each laser scan message includes frame and time information to differentiate. For this you have to set up your URDF correctly. |
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2015-02-25 03:12:28 -0500 | answered a question | which rosserial to use? If you are using ROS Indigo, either one of the ones you mentioned should work fine. I installed ros-indigo-rosserial via apt-get and it works flawlessly. |
2015-02-24 22:05:21 -0500 | commented question | Unsubscribing from topics I have never had to use it, but from the class reference, it seems shutdown() is the right method: Unsubscribe the callback associated with this Subscriber. This method usually does not need to be explicitly called, as automatic shutdown happens when all copies of this Subscriber go out of scope |
2015-02-24 19:13:00 -0500 | commented question | Unsubscribing from topics Is there any reason why you want to unsubscribe? The ROS topic system is designed such that you can have multiple publishers and subscribers on one topic. This is less confusing, because when you do "rostopic list", you see the complete output. I suggest you simply stop calling the "publish" method. |
2015-02-01 10:35:54 -0500 | answered a question | Problem converting simple urdf file in collada I am having the exact same problem on ROS Indigo on Ubuntu 14.04! Even on very simple URDF files. I am not sure if this is related, but as an alternative I also tried to convert the URDF to DAE in code, as follows: But this gives the following build error: I installed ROS as ros-indigo-desktop-full and it appears that there is something deeply wrong in the way the packages are set up. My knowledge in CMake and catkin isn't deep enough to find the problem. I have already wasted 4 hours on this with no success. Any help would be greatly appreciated. |
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2013-10-08 17:14:48 -0500 | asked a question | Error loading my rqt plugin from rqt_gui Hello! I have written a quick rqt plugin, starting with the roscreate-qt-pkg command to create a package and then following the rqt tutorials. When trying to load the plugin in rqt_gui, I get the following error: I am using ROS fuerte on Ubuntu 12.04. My manifest.xml is the following: My plugin.xml is the following: My CMakeLists.txt is the following: And finally, my source file has the following declaration at the bottom: I have also compared my code to that of rqt_image_view and I can't find the difference. The code compiles and I can run it as a stand-alone application, but I can't seem to open it in rqt_gui. Thanks! |