okalachev's profile - activity

If a node in a test-case crashed, rostest doesn't care about it, and succeeds the testcase.

For example:

$ rostest somepkg basic.test
... logging to /home/parallels/.ros/log/rostest-parallels-vm-6224.log
[ROSUNIT] Outputting test results to /home/parallels/.ros/test_results/somepkg/rostest-test_basic.xml
Traceback (most recent call last):
  File "/home/parallels/catkin_ws/src/somepkg/src/fail.py", line 3, in <module>
    print 1/0
ZeroDivisionError: integer division or modulo by zero
[Testcase: testbasic_test] ... ok

[ROSTEST]-----------------------------------------------------------------------

[clever.rosunit-basic_test/test_state][passed]

SUMMARY
 * RESULT: SUCCESS
 * TESTS: 1
 * ERRORS: 0
 * FAILURES: 0

rostest log file is in /home/parallels/.ros/log/rostest-parallels-vm-6224.log

How to make rostest fail the test if a node crashes?

Actually, to make the nodes "required" is kind of a solution.

Actually, I found kind of solution, if a "required" node falls, then tests fall too. The only problem is that I don't wa

Yeah, but it doesn't make sense. If one of my nodes just has fallen, why in the world we can consider that our tests are

Rostest succeeds test if a node crashes If a node in a test-case crashed, rostest doesn't care about it, and succeeds th

Rostest succeeds test if a node crashes If a node in a test-case crashed, rostest doesn't care about it, and succeeds th

Hello.

What do you think is the best solution to transparently forward some of the ROS topics of a robot to the special server computer through the Internet? So several operators could (via web interface) view the state of robots and send commands to them (via topics or services).

It can be developed using HTTPS interface, or WebSockets, or raw TCP/UDP; different storages for messages can be used (SQL, MongoDB, Redis). Or maybe some ready solution for such tasks?

Please, make some advises.

Synchronize by exact time with CameraSubscriber How is it possible to synchronize an image_transport::CameraSubscriber (

Synchronize by exact with CameraSubscriber How is it possible to synchronize an image_transport::CameraSubscriber (image

How to change a quaternion's body-fixed yaw?

Using Matrix3x3's getRPY and then setRPY doesn't work, because this is about the axes, fixed to the initial orientation, so it's fixed yaw, not body yaw.

Using getEulerYPR and then setEulerYPR doesn't work as well, because yaw rotation it the first, and it gets affected the following pitch and roll rotation.

I think getEulerRPY/setEulerRPY might work, but there are no such functions in the tf and tf2 libraries.

This looks working (pq - input quaternion): tf::Quaternion q; q.setRPY(0, 0, angle_to_rotate); pq = pq * q;

The problem is, that if I keep roll and pitch, changing the yaw, that would be rotation about extrinsic Z axis, while I

Rotate quaternion by body yaw How to change a quaternion's body-fixed yaw? Using Matrix3x3's getRPY and then setRPY doe

Rotate quaternion by body yaw How to change a quaternion's body-fixed yaw? Using Matrix3x3's getRPY and then setRPY doe

There are two orientations given, as intrinsic yaw-roll-pitch (rzyx).

How to calculate the angle between the "Z" axes of them?

Converting the orientations to quaternions or to anything else is allowed.

Transform angular velocity with tf2 Is it possible to transform angular velocity (x, y, z) or a TwistStamped with TF2 (i

Transform angular velocity with tf2 Is it possible to transform angular velocity (x, y, z) or a TwistStamped with TF2 (i

Yes, I think this is a working variant! Isn't there an easier solution, without converting to transforms? I was given t

Yes, I think this is a working variant! Isn't there an easier solution, without converting to transforms? I've given th

Yes, I think this is a working variant! Isn't there an easier solution, without converting to transforms? I've given th

Looks like it's the finding of the full rotation between orientations. What I need, it the single angle between the Z ax

Angle between two orientations There are two orientations given, as intrinsic yaw-roll-pitch (rzyx). How to calculate t

What is the standard ROS way for implementing on-the-fly resolution changing for a camera node?

I haven't found any official articles on this, also I haven't found any popular camera nodes, supporting this. This feature is critical for my application, I want to implement it for e. g. cv_camera, but what should be the API?

Should it be dynamic_reconfigure parameters? Actually, I have never seen such parameters in a real-live package.

Or should it be some ROS service? set_camera_info, maybe?

Or maybe just standard parameters should be used, so the node should poll them periodically?

Yes, this is clear. The code, I need to work with images does it correctly, with the last camera info message. The open

I believe, that all of the standard CV nodes use the latest cameraInfo message. You should do that because of two reason

When you use subscribeCamera, you get updated image and cameraInfo message in your callback at the same time. So this is

API for changing a camera resolution What is the standard ROS way for implementing on-the-fly resolution changing for a