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2012-08-21 08:17:53 -0500 commented answer how to access old transforms tf

The python API is very thoroughly buried so I'll post it here to save the next guy some time. TransformListener.__init__ takes two positional arguments. The first is boolean, whether to interpolate, and the second is length of the transform cache (rospy.Duration)

2012-06-20 09:46:14 -0500 commented question Another OSX Lion snag: no formula for libyaml

I have reason to believe that this is a problem with my homebrew installation and isn't related to ros. I'll let you know.

2012-06-20 09:27:05 -0500 asked a question Another OSX Lion snag: no formula for libyaml

On my brand new today Macbook Pro 10.7.4, following the instructions here, it fails on step 1.2.2:

brew install ros/fuerte/libyaml

Error: No available formula for libyaml

Please tap it and then try again: brew tap ros/fuerte

The only warning I got from brew tap ros/fuerte was related to flann, which I doubt is relevant.

Thanks for any help.

2011-11-04 17:20:18 -0500 received badge  Student (source)
2011-11-04 03:30:19 -0500 asked a question How do I find specific planner configuration options?

Basically, I'd like to re-ask this question.

I would like to run some benchmarking tests using several of the planners available in ompl. I would also like to be able to experiment with different configuration options for those planners. But in order to populate ompl_planning.yaml, I need to know what those options are named, and presumably this will vary by planner type. How do I find this out?

2011-10-05 01:09:27 -0500 received badge  Supporter (source)
2011-10-05 01:09:09 -0500 answered a question ROS electric arm navigation programmatically adding collision object

Don't forget that you will need to set the "use_collision" to true in the planning environment.

2011-09-01 04:10:51 -0500 received badge  Teacher (source)
2011-07-28 08:02:43 -0500 answered a question Joint publisher with empty velocity and effort vector

I'm having the same problem. It seems like, in its current form, joint_state_publisher is incompatible with motion_planning_common. Is there a workaround? The project page suggest that one can set default values but doesn't elaborate on how.

2011-07-27 02:08:28 -0500 received badge  Editor (source)
2011-07-26 09:16:38 -0500 answered a question Waiting for action server when using SimpleActionClient

I'm having this problem too. I'm running diamondback (1.4.8). I can produce it with pretty recently checked-out pr2 stacks with the following

  1. roslaunch pr2_gazebo pr2_empty_world.launch
  2. roslaunch pr2_3dnav right_arm_navigation.launch
  3. roscd pr2_navigation_tutorials; ./bin/move_arm_joint_goal

This hangs on line 10: move_arm.waitForServer();

roswtf tells me that all the move_right_arm subscriptions are unconnected. rostopic echo move_right_arm/* doesn't give me any messages either.

Can someone confirm this? I followed the relevant tutorials to the letter. I would very much appreciate any debugging suggestions.

Thanks, Tom