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How do i dumb my param values into a yaml file using C++? I tried system("rosparam dump example.yaml"); but no luck..

Hi everyone, I need help creating a GUI for ROS Kinetic. I tried the ROS - QML - Plugin and no luck. Any guidance , tutorials , or advice on how to go about this will be appreciated. Essentially , I want the GUI to be a node and collect and receive information. Thank you

Hi I am reading "ROS ROBOTICS BY EXAMPLE SECOND EDITION " and I am stuck in chapter 2 , when it introduces the dd_robot2.urdf. What I am getting is the image blow

but the book has this instead:

I followed the book step by step and I cant figure out where I went wrong. Any help? Thank you!

EDIT1:

EDIT 2:

Launch File:

<launch>
   <!-- values passed by command line input -->     
   <arg name="model" />
   <arg name="gui" default="False" />

   <!-- set these parameters on Parameter Server -->
   <param name="robot_description" textfile="$(find ros_robotics)/urdf/$(arg model)" />
   <param name="use_gui" value="$(arg gui)"/>

   <!-- Start 3 nodes: joint_state_publisher, robot_state_publisher and rviz -->
   <node name="joint_state_publisher" pkg="joint_state_publisher" type="joint_state_publisher" />

   <node name="robot_state_publisher" pkg="robot_state_publisher" type="state_publisher" />

   <node name="rviz" pkg="rviz" type="rviz" args="-d $(find ros_robotics)/urdf.rviz" required="true" />
   <!-- (required = "true") if rviz dies, entire roslaunch will be killed -->
</launch>

URDF File:

<?xml version='1.0'?>
<robot name="dd_robot">

  <!-- Base Link -->
  <link name="base_link">
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0" />
      <geometry>
          <box size="0.5 0.5 0.25"/>
      </geometry>
    </visual>
  </link>

  <!-- Right Wheel -->
  <link name="right_wheel">
    <visual>
      <origin xyz="0 0 0" rpy="1.570795 0 0" />
      <geometry>
          <cylinder length="0.1" radius="0.2" />
      </geometry>
    </visual>
  </link>
  <joint name="joint_right_wheel" type="continuous">
    <parent link="base_link"/>
    <child link="right_wheel"/>
    <origin xyz="0 -0.30 0" rpy="0 0 0" /> 
    <axis xyz="0 1 0" />
  </joint>

  <!-- Left Wheel -->
  <link name="left_wheel">
    <visual>
      <origin xyz="0 0 0" rpy="1.570795 0 0" />
      <geometry>
          <cylinder length="0.1" radius="0.2" />
      </geometry>
    </visual>
  </link>
  <joint name="joint_left_wheel" type="continuous">
    <parent link="base_link"/>
    <child link="left_wheel"/>
    <origin xyz="0 0.30 0" rpy="0 0 0" /> 
    <axis xyz="0 1 0" />
  </joint>

</robot>

Command on terminal:

$ roslaunch ros_robotics ddrobot_rviz.launch model:=dd_robot2.urdf

Edit3:

let me try that

Descartes package in ROS Kinetic Errror I am trying to build a workspace with the Descartes package and I keep getting

Descartes package in ROS Kinetic Errror I am trying to build a workspace with the Descartes package and I keep getting

Hi everyone,

I am having a small issue sourcing ROS kinectic in my Raspberry PI 3(OS: Ubuntu Core). Every time I want to use ROS i have to use the command source /opt/ros/kinetic/setup.bash and then I can use ROS commands like roscore. But I want to source ROS kinectic in the bash file. I have tried sudo nano ~/.bashrc but doesnt source ROS automatically. Is there another way to source it in the bash file?

Thank you

found it thanks! Doing sudo nano /etc/bash.bashrc also sudo because i figured we might be superuser

How to sourcing ROS Kinetic in Ubuntu Core via ssh? Hi everyone, I am having a small issue sourcing ROS kinectic in my

How to sourcing ROS Kinetic in Ubuntu Core via ssh? Hi everyone, I am having a small issue sourcing ROS kinectic in my

How to sourcing ROS Kinetic in Ubuntu Core via ssh? Hi everyone, I am having a small issue sourcing ROS kinectic in my

Hello, I am wondering if I can upload my workspace to a USB? I am guessing you cant because of the file structure of ROS but if I can how does one go about that? If I cant , can I move my packages to a USB?

How did i not see that lol Thanks to much!

Should be upper_base_link

PI Robot upper_base_link not showing in Rviz Hello all! I am having a minor issue in Rviz not displaying a link in Rviz.

Hi everyone! Quick question on tf::StampedTransform. By using that function in C++ does it create parent frame and child frame automatically? EX:

 br.sendTransform(tf::StampedTransform(transform, ros::Time::now(), "banana", "basket"));

In this case does the frame banana and basket get created? Thanks!

so what is the origin of banana(parent frame)?

so what is the origin of banana(parent frame)? is it origin?

I guess my question is where is a frame defined? Within the broadcasters CPP file or somewhere else?

Does tf::StampedTransform create a parent and child frame if they both do not exist? Hi everyone! Quick question on tf::

Hi everyone! I know this might sound silly but I just want to ask simple question to reassure myself. Is a joint in a URDF considered a frame in the TF library? Thanks!

Oh! makes sense! Thank you so much! Edit: rosrun tf view_frames confirms it

Oh! makes sense! Thank you so much! Edit: rosrun tf view_frames confirms it

Oh! makes sense! Thank you so much! Edit: rosrun tf view_frames confirms it