HassanNadeem's profile - activity

Have you confirmed if the depth image is generating correctly or not? Try this to view the depth image rosrun image_view image_view image:=/camera/depth/image_raw

Following is the path to the file "/home/pi/ros_catkin_ws/src/rviz/src/rviz/mesh_loader.cpp" if you are following the setups on wiki.ros.org

I am trying to run gmapping in a large empty space with hokuyo utm-30lx. The problem is that most of the readings on /scan is inf and gmapping is not mapping that as empty space, even though I have the following parameters set:

maxUrange: 30.0
maxRange: 60.0

How do I fix this?

In mapping_default.launch, default "odom_frame" is "nav". And the hector_mapping node publishes transform from map to nav.

If I have put nav as a parent of base_footprint with 0,0,0,0,0 transformation, the mapping runs fine. But I don't understand the reasoning behind this.

Can somebody explain to me for calling odom_frame nav.

If I do ros::Duration::sleep does ros spin and are callback functions called?

If not is there a way to pause the program while still managing callbacks?

I am running gmapping on husky bot with hokoyo scanner in gazebo simulation environment. I am experimenting with gmapping in an empty world. Gmapping does not create any map and the map frame jumps around. Why does gmapping not create a map or mark cells as vacant if the laser scanner is not detecting any obstacles. And if the laser scanner can't see any landmarks, why is the map frame not equal to odom frame?

Installing turtlebot_create_desktop from source solved the problem.

find command returns no results! Am i right in assuming that the plugin is found in ros-indigo-gazebo-ros-control package.

I am following the Explore the Gazebo world tutorial of turtlebot_simulator in ROS Indigo. Whenever I try to launch roslaunch turtlebot_gazebo turtlebot_world.launch I get the following error

Error [Plugin.hh:156] Failed to load plugin libgazebo_ros_create.so: libgazebo_ros_create.so: cannot open shared object file: No such file or directory

I have ros-indigo-gazebo-ros-control installed. What do I do to fix this?

Edit: I have also tried compiling from source.

If you are using Ubuntu and gnome-terminal you could replace "xterm -e" with "gnome-terminal --command" to open in Ubuntu's default terminal.

I have got an arduino connected to my robot that reads the encoder and controls the motors.

What would be better, calculating odometry on arduino and publishing the odometry message to ROS on my Laptop?

Or publishing the encoder ticks to ROS and publishing the odometry messages after processing from Laptop?