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2017-12-06 23:15:19 -0500	received badge	● Famous Question (source)
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2017-01-04 15:33:09 -0500	answered a question	cv_bridge installation error: wrong number of template arguments In the end I was able to get cv_bridge to compile by upgrading Ubilinux from Debian 7 Wheezy to 8 Jessie. It is possible that libboost1.49-dev included in Wheezy was too old for cv_bridge, and Jessie comes with libboost1.55-dev. Boost 1.53 is also the minimum version required for ROS Indigo: http://www.ros.org/reps/rep-0003.html (note that the official installation instructions for Indigo on Debian Wheezy don't mention the libboost-dev library being too old). For anyone else experiencing similar issues with ROS on Edison, there are some updated install scripts and instructions for Indigo and Kinetic available here: https://github.com/pennaerial/ros-setups
2017-01-03 14:43:17 -0500	asked a question	cv_bridge installation error: wrong number of template arguments I am getting an error when trying to install cv_bridge on Ubilinux (based on Debian 7 Wheezy), with ROS Indigo. The error is quoted below. I already discovered this answer: http://answers.ros.org/question/22490... However, the solution doesn't help me as it requires modifying the codebase to only work with little endian data, which I cannot guarantee. Digging through the source, it appears that cv_bridge includes the necessary boost::endian::conversion files within its source code, hence it should not require boost 1.58+ to be installed system-wide. However, compiling this included boost library creates this error. Does anyone have any ideas how to debug this error or how to fix it? Thanks in advance! In file included from /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/cv_bridge.cpp:36:0: /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:26:3: warning: scoped enums only available with -std=c++11 or -std=gnu++11 [enabled by default] /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:329:72: error: wrong number of template arguments (1, should be 3) /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:328:13: error: provided for ‘template<boost::endian::order from,="" boost::endian::order="" to,="" class="" endianreversible=""> class boost::endian::detail::value_converter’ /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:331:78: error: wrong number of template arguments (1, should be 3) /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:328:13: error: provided for ‘template<boost::endian::order from,="" boost::endian::order="" to,="" class="" endianreversible=""> class boost::endian::detail::value_converter’ /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:333:75: error: wrong number of template arguments (1, should be 3) /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:328:13: error: provided for ‘template<boost::endian::order from,="" boost::endian::order="" to,="" class="" endianreversible=""> class boost::endian::detail::value_converter’ /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:335:75: error: wrong number of template arguments (1, should be 3) /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:328:13: error: provided for ‘template<boost::endian::order from,="" boost::endian::order="" to,="" class="" endianreversible=""> class boost::endian::detail::value_converter’ /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:411:65: error: wrong number of template arguments (1, should be 3) /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:410:13: error: provided for ‘template<boost::endian::order from,="" boost::endian::order="" to,="" class="" endianreversibleinplace=""> class boost::endian::detail::converter’ /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:413:71: error: wrong number of template arguments (1, should be 3) /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost/endian/conversion.hpp:410:13: error: provided for ‘template<boost::endian::order from,="" boost::endian::order="" to,="" class="" endianreversibleinplace=""> class boost::endian::detail::converter’ /home/px4/indigo_catkin_ws/src/vision_opencv/cv_bridge/src/boost ... (more)
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2016-06-23 08:24:31 -0500	commented question	Does every ROS node need to spin()? Thanks everyone! I understand it know, especially Martin's explanation that the queue is only global within the node, not across all nodes.
2016-06-23 02:02:34 -0500	received badge	● Famous Question (source)
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2016-06-22 00:50:14 -0500	received badge	● Popular Question (source)
2016-06-21 14:25:17 -0500	asked a question	Does every ROS node need to spin()? I have been using ROS for a short time now and learned about callbacks & spinning. My question is, since be default all callbacks are added to the global callback queue, does ros::spin() in node A also process callbacks for subscribers in node B? For a specific example, in MAVROS there is a 4 thread asynchronous spinner. I built a ROS node that uses MAVROS. In my node I also use an asynchronous spinner to process callbacks; however if they both use the global callback queue then is my asynchronous spinner redundant? Thanks!