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ROS Python Package I am running into a problem with ROS Python package structure as per http://wiki.ros.org/PyStyleGuide

ROS Python Package I am running into a problem with ROS Python package structure as per http://wiki.ros.org/PyStyleGuide

I'd appreciate it if someone can explain the reason why the actionlib simpleServer constructor needs to be initialized as a constructor initializer list? If the initialization's removed the compilation fails.

reference to actionlib tutorials

I know this is more as a C++ question rather than ROS related question!

Thank you.

Thank you @ahendrix. Do you have any reference/article explains this topic more in depth?

Thank you @ahendrix. Do you have any reference/article explain this topic more in depth?

Thank you @ahendrix. Do you have any reference/article explains more in details that the object needs to be initialized

actionlib constructor initialization I'd appreciate it if someone can explain the reason why the actionlib simpleServer

ROS Source Code Completion With Emacs Does anybody have managed to setup emacs for ROS code completion (using company-mo

I used to use the server parameters and the dynamic_reconfigure. I know the server parameters (rosparm) used to send messages to the node, in which those messages do not change much. The question is that I really don't understand the advantage of the server parameters over the dynamic_reconfigure. I feel I'm missing something or I don't understand the goal of the server parameters

Thanks for sharing :)

Such packages you find them in /opt/ros/indigo/share If you want to get the path for a specific package, say urdf_tutorials, you can type: roscd urdf_tutorial/

I understand your situation and I've been in this situation when I started learning ROS. It's really hard to give you an answer to your question, but I can make suggestions:

• For instance, make sure your understand the basics and fundamentals of ROS before start concerning how to program your turtlebot.
• Go through the ROS tutorials and make sure to understand what are the meanings of nodes, topics, messages, launch files, listeners, and publishers. Just try to get the big picture!
• Try to understand how to configure your CMakeLists.txt and your package.xml
• User Eclipse or QTCreator as an IDE for your project, instead of using a text editor for writing your code)
• Divide your project into many stages (start with the easier stages and move on to the the more difficult as your ROS skills improve)
• Whenever you face a problem, do not hesitate to ask questions on ROS Answers. So many ppl will be glad to help (as long as you show them you tried and put efforts to solve the problem).

If you find any of the points vague, let me know and I will explain more. Don't give up! ROS seems to be impossible at the beginning, but once you get used to it you will find it cool! It just takes time (as it's the case with every open-source library/software)

Good luck...

I noticed that the higher the goal tolerance, the more percentage of success in the IK alguorithm. Perhaps you can send your questions to the moveit mailing lists (you get better responses than ros answers).

That's nice! I never thought about this idea!

Are you sure you did setup ROS Environment?

The tf function you're looking for is

lookupTransform(target_frame, source_frame, time) -> (position, quaternion)

The function returns the translation and rotation of the transformation between the two frames:

(translation,rotation) = t.lookupTransform("tf_1", "tf_2", rospy.Time())

Now, you have the translation and rotation values, you can construct the pose msg.

Try to source the ROS environment parameters

echo "source <path_to_workspace>/devel/setup.bash" >> ~/.bashrc

Close the current terminal and run a new one. You should see the node in the list. If you don't want to close the current terminal, do this:

source ~/.bashrc

Note: Pimentel answer is also correct, but you have to do it everytime you open a new terminal. If you added the source command to the bashrc, it will be loaded automatically.

I agree with @Chrissi. Try python if find C++ difficult. It's very easy and robust programming language!

You're right! Thank you.

There's a new .launch element (only in Indigo) that delays the repawn of a node. However, it doesn't do what it says.

This is a demo part of the .launch file I have: Is there anything I'm missing?

<node pkg="res_prj" type="init_tf_broadcaster" name="init_tf_br"
 respawn="true" respawn_delay="20"/>

I expect the node init_tf_br respawn after 20 secs, but it starts immediately once it dies.

Thanks in advance.

Reference: http://wiki.ros.org/roslaunch/XML/node

I wish I can vote for this answer 1000 times!