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2016-06-07 15:05:12 -0500 | answered a question | Native spherical (WGS84) coordinates? The Spherical Coordinate and GPS plugin classes in Gazebo implement WGS84<-->local XYZ coordinates via the intermediate Earth Centered Earth Fixed frame (here's one of many refs on this conversion). This is compared to the equirectangular projection implemented by the Hector GPS plugin. The local XYZ origin is located at the lat/long specified in the Gazebo world file and has an ENU (East-North-Up) orientation. |
2016-06-07 10:03:03 -0500 | asked a question | Native spherical (WGS84) coordinates? (this is a cross post from answers.gazebosim.com ) I'm looking to build a simulation where I can accurately bookkeep my robots position in geodetic coordinates (WGS84 datum). Unfortunately the ROS+Gazebo+Hector GPS plugin route isn't likely to work, exactly because I'm trying to simulate vehicles at high latitude (near the poles), and traveling large distances O(10 km), so the equirectangular projection used by the Hector GPS plugin can't be expected to yield accurate results. Is it possible to run ROS+Gazebo to run a simulation natively in spherical coordinates? I haven't been able to find any resources to date on this. If not, have any others found themselves in a similar situation? Outside of writing a dynamical model in MATLAB or similar, have others found an acceptable solution? |
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2016-06-06 10:44:12 -0500 | answered a question | Parsing periodic emails and broadcasting as ROS topic? Following @gvdhoorn's direction, I implemented Python + imaplib2. GitHub user @jexhson: has a nice example of imaplib2 + IDLE: https://gist.github.com/jexhson/3496039 . Haven't yet tested IDLE timeouts (I read a few places this could happen), but works very nicely so far in my short term testing. |
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2016-05-17 11:31:10 -0500 | commented question | pointgrey_camera_driver not publishing data to /camera/raw_image topic Did you go through the UDEV config steps? I've only used the point grey driver to get the camera serial # and to ensure it's properly connected to the computer. I use the camera1394 node to stream the images and camera configuration. |
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2016-05-16 13:44:32 -0500 | asked a question | Parsing periodic emails and broadcasting as ROS topic? Does anybody have experience or thoughts about how one might go about parsing periodic (sent in 30/60 second or longer interval) emails and then broadcasting their clear text contents (or .txt attachment) as a ROS topic? I'm more interested in the mechanics behind the ROS<-->email server bit as parsing clear text and building my ROS msgs won't be difficult. For the curious, I have a set of GPS trackers that transmit GPS messages/sentences via the Iridium SBD system. The SBD (Short Burst Data) messages arrive to me in the form of clear text emails containing what ever GPS data I want (NMEA sentences, or custom messages). My initial thoughts:
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2016-02-10 21:10:32 -0500 | answered a question | Trouble installing Indigo on Debian jessie (collada_parser build failure) Following advice from @Humpelstilzchen I got collada_parser built, and ROS installed. Removed collada-com-dev (using dpkg worked fine), re-ran checkinstall, followed by sudo ldconfig -v (libcollada-dom2.4... did show up there) ROS built cleanly and installed into appropriate directory thereafter. Thanks for the help @jbohren and @Humpelstilzchen |
2016-02-10 21:01:30 -0500 | commented question | Trouble installing Indigo on Debian jessie (collada_parser build failure) Success! Thank you @Humpelstilzchen. |
2016-02-10 17:08:38 -0500 | commented question | Trouble installing Indigo on Debian jessie (collada_parser build failure) Updated (thank you @jbohren!): https://gist.github.com/anonymous/4ca... |
2016-02-10 16:48:15 -0500 | commented question | Trouble installing Indigo on Debian jessie (collada_parser build failure) |
2016-02-10 15:57:02 -0500 | asked a question | Trouble installing Indigo on Debian jessie (collada_parser build failure) Following the directions at http://wiki.ros.org/indigo/Installati... (yes I realize this is fro Wheezy, but stick with me), everything seems to be OK up until the point at which I try and compile the packages with Building collada_parser fails: Doing a locate collada-dom2.4-dp I receive the following Because I'm new to CMake, and building anything of significance from source, I'm not sure where to even start on remedying this. I'm guessing it's looking for the file in /usr/local/lib, but can't find it, but I'm not sure. |