HammyG's profile - activity

overview network karma followed questions activity

2013-02-16 06:29:42 -0500	received badge	● Necromancer (source)
2013-02-09 06:27:23 -0500	received badge	● Necromancer (source)
2013-02-09 06:27:05 -0500	received badge	● Teacher (source)
2013-02-09 06:27:05 -0500	received badge	● Necromancer (source)
2013-02-09 03:35:33 -0500	commented answer	How can I get nearest occupied point from map? Awesome! That will come in handy for me.
2013-02-08 15:03:04 -0500	answered a question	rviz over Wifi "brw_upload_constant_buffer: Assertion" failed If you still cannot get it fixed, have you considered SSH'ing (with X) into the machine and bringing rviz up from there?
2013-02-08 14:58:35 -0500	answered a question	How to evaluate AMCL localization performance Have you considered using stage simulation? That way you have the ground truth pose (exactly where the robot is in the simulated world) which you can compare against the amcl pose. For example, you can compare the euclidean distance between the two poses after moving the robot on a fixed path. Run this for both laser inputs, and whichever has the lowest (average!) distance is presumably the better one.
2013-02-08 14:49:28 -0500	answered a question	How can I get nearest occupied point from map? You will have to create your own node that subscribes to the map (OccupancyGrid) from the map_server, on topic /map. Once you have that you can find out which cells in the map are occupied.
2013-02-08 14:44:22 -0500	answered a question	openni_tracker fails with fuerte and Xubuntu 12.04 LTS I had this problem. Every time I ran the openni_tracker node it threw a "Find user generator failed: This operation is invalid!" How I solved it: Run the ./install.sh from your NITE download. I used NITE-Bin-Dev-Linux-x86-v1.5.2.21 Hope this helps!
2013-01-25 03:36:18 -0500	answered a question	Segfault in fuerte stageros I had a similar issue with stage throwing a SegFault with an old world file (even after updating laser -> ranger). The cause was (as mentioned by kbogert) the Z dimension was set to 0 on the robot.