jpiramirez's profile - activity

My suggestion would be to rely on one or several nodes to take down the whole roslaunch script when they finish executing. Use the required="true" attribute inside a <node> tag, so whenever your node dies or finishes it takes down all of the other nodes in the launch file.

Hello,

I'm attempting to send a sensor_msgs/CameraInfo message using rosjava. The message itself gets sent just fine, but I'd like to fill in every field of the message with my correct camera calibration information. I noticed there is a setK() method, as well as setP() and others to accomplish this task.

When I try to set those fields to some values, rostopic echo reports different ones.

In my code I have:

sensor_msgs.CameraInfo caminfomsg = caminfopub.newMessage();
double[] K = {160, 0, 160, 0, 160, 120, 0, 0, 1};
caminfomsg.setK(K);

But when I run it and take a look with rostopic this is what I get:

K: [4.4e-323, 5.337368564e-315, 0.0, 5.337368564e-315, 0.0, 5.337368564e-315, 5.33542582e-315, 0.0, 0.0]

Any suggestions?

I moved my development from an x86 machine to a 64-bit one, running Ubuntu Precise and ROS Fuerte. My logging messages inside the subscriber started showing up on the rxconsole, so this is solved.

I think I understand what you try to do, but I feel it contradicts the design principles behind ROS. Ideally, you would launch a bunch of nodes using a roslaunch script or something similar. Your GUI would be better focused if it interacted with said nodes through their topics. The current rosjava uses a script that executes the org.ros.RosRun class with your node class as an argument. If you really wanted to integrate a GUI + node launching, maybe you could add every JAR file generated by gradle as a dependency to your project... But since the API and almost everything in rosjava is still volatile it may be harmful to hardcode things that way.

If I take a single node (a class that extends AbstractNodeMain) and I include both publishers and a subscriber, the subscriber does not seem to receive any information that I publish to its topic with rostopic.

I was trying to merge both the Listener and Talker examples into a single entity that publishes using the executeCancellableLoop and subscribes to a topic with the addMessageListener method. My goal is to write a robot driver that publishes sensor data at the same time that it listens for movement commands. Can this be done?

If I avoid adding the subscriber the publisher works fine, and viceversa. If I add both things, the publisher works fine but the subscriber doesn't read any data, although the topic appears in the output of rostopic list.

I am using ROS Fuerte with the Python roscore.