snoworld's profile - activity

Hello, Can anyone help me with piano demo kinect? When I try to run rviz, the answer is error: Package [mapping_rviz_plugin] does not Have Any loaded plugins available, for display of type [mapping_rviz_plugin:: PolygonalMapDisplay] and name [PolygonalMap3] I can not find this plugin, someone could tell me how to install it? thanks

The rostopic and rosnode tools should help you debug this.

First you can check if the Hokuyo node is publishing anything, by using 'rosnode info <nodename>'. You can find the nodename by running 'rosnode list'. This should show you the topics that are published by the Hokuyo node. Check if 'scan' is one of the published topics.

Then see if there is actual data on the 'scan' topic, by running 'rosnode hz scan'. This will show you how many messages are published on the 'scan' topic.

Now see which nodes are using the 'scan' topic by running 'rostopic info scan'. You should see the Hokuyo node as a publisher, and your own node as a subscriber. If your node is not listed as a subscriber, it can't receive any scan messages.

you will have to add a display to show images. after you have done so it should show an interface where you can select the topic. after selecting the right topic it should show a window, in which your image should be shown. the link provide by lakshmen contains a clear explanation how to do this.

Have a look at this. http://www.ros.org/wiki/rviz/UserGuide You need to add a Camera display.

I can select the topic that publish my node, but I cant see any image. I can see this on rviz Displays: Global Options -> Fixed Frame: /camera. Global satatus: No tf data. Actual error: Fixed Frame [/camera] does not exist. Camera status: warning -> CameraInfo: No CameraInfo received on [/camera_info]; Image: No image image received

I read it. I execute camera node using image_transport::Publisher, that publish an sensor_msgs::Image. I have to configure something on rviz? topic is the name that I used ti publish images from camera?

Hi! I need help. Can you tell me how to visualize the camera image on rviz?

Yes I chech it on rviz and I can see a white line that indicates where are an objects. I changed "scan" topic to "/scan" but nothing changes, I get the same response...

I need help. When I run hokuyo_node I suppose that it publish information about laser data, like intensity or range. I need to get that information in another node to do object detection but I dont know how to do. I tryed this:

ros::Subscriber hokuyoSubscriber = n_2.subscribe("scan", 1, scanValues);

void scanValues(const sensor_msgs::LaserScan laser)
{
    ROS_INFO("size[%d]: ", laser.intensities.size());
    for (unsigned int i=0; i<laser.intensities.size();i++)
    {
        intensities[i] = laser.intensities[i];
        ROS_INFO("intens[%f]: ", intensities[i]);

    }
}

But receives nothing...

Hello, I downloaded robotino_drivers, and I run the robotino_teleop node, I first compile it and then execute it as follows: - roscore - roslaunch robotino_teleop teleop_keyboard.launch and when I press wasd nothing happens.

If I run another node, like as robotino_base_node, the following occurs:

QAbstractSocket: HostLookupState QAbstractSocket: ConnectingState QAbstractSocket: ConnectedState QAbstractSocket: ClosingState QAbstractSocket: UnconnectedState

I can see that it connects but then disconnects again

My Robotino only has camera, IR sensors and bumpers, I just need to run any program by ROS and see that the robot moves. Can someone help me?

Thanks