[ros-users] rospy and simulation time
wpdster at gmail.com
Thu Nov 4 20:58:27 UTC 2010
Is it possible to make rospy use simulation time instead of wall-clock time?
Consider the following program:
import roslib; roslib.load_manifest('wpdtb')
print "About to sleep for 5 seconds..."
I run this on a slow machine (i.e. one in which simulation time runs
slower than real time). If I start up roscore in one window, and run
this in a second window, it exits after 5 seconds as expected. If
instead I launch the PR2 simulator in one window:
$ roslaunch pr2_gazabo pr2_empty_world.launch
and run this in a second window, it still exits after about 5
wallclock seconds. I thought the /use_sim_time parameter would have
made this wait 5 simulated seconds.
I have similar problems with rospy.rate(). And I've given up all
together passing a Duration() timeout to wait_for_service().
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