Andrew Price's profile - activity

Has anyone gotten the <param type="yaml"/> syntax to work? It fails for me on Kinetic with: Invalid <node&g

Rebooting the computer after installing usb_cam and apt updating worked for me. Initially, running v4l2-ctl --list-forma

@arwtyxouymz, that's probably best for another question, and I'm not super familiar with docker-compose. On my machine,

The immediate shutdown is coming from the set -e flag in the entrypoint. I'm not sure what the problem with the develspa

@PeteBlackerThe3rd is right about the units. The package depth_image_proc has functions to convert between the two versi

Also, Gazebo will round sufficiently small numbers to 0, so you may encounter this problem even with a nonzero mass/iner

Can someone explain for me why topics in rxgraph are shown as edges, rather than a different type of node? For instance, if you only have one publisher and subscriber on a particular topic, then it makes sense to represent that relationship as an edge. However, if you have multiple publishers/subscribers on a topic, it seems like a lot of redundant edges are created, since the underlying relationship is more like a directed hypergraph than a normal digraph. Here's a trivially simple example from rxgraph (sorry, it won't let me upload images directly):

i49.tinypic.com/np1185.png

It would make more sense to me to lay it out like:

i47.tinypic.com/12216w9.png

Service calls would still be regular edges, though.

Forgive me if the answer is obvious; I've only been using ROS for about a week now.

Dot file contents for original:

digraph G {
  rankdir=LR;
  _rosout [label="/rosout", URL="node:/rosout"];
  _rviz_bag [label="/rviz_bag", URL="node:/rviz_bag"];
  _my_pcl_tutorial [label="/my_pcl_tutorial", URL="node:/my_pcl_tutorial"];
  _play_bag [label="/play_bag", URL="node:/play_bag"];
    _play_bag->_rviz_bag [label="/tf"]
    _play_bag->_rosout [label="/rosout"]
    _my_pcl_tutorial->_rosout [label="/rosout"]
    _rviz_bag->_rosout [label="/rosout"]
    _play_bag->_my_pcl_tutorial [label="/camera/rgb/points"]
    _play_bag->_rviz_bag [label="/camera/rgb/points"]}

Dot file contents for suggestion:

digraph G {
  rankdir=LR;
  node [shape="box"];

  _rosout [label="/rosout", URL="node:/rosout"];
  _rviz_bag [label="/rviz_bag", URL="node:/rviz_bag"];
  _my_pcl_tutorial [label="/my_pcl_tutorial", URL="node:/my_pcl_tutorial"];
  _play_bag [label="/play_bag", URL="node:/play_bag"];

  _camera_rgb_points_topic [label="/camera/rgb/points" shape="ellipse"];
  _rosout_topic [label="/rosout" shape="ellipse"];
  _tf_topic [label="/tf" shape="ellipse"];

    _play_bag->_tf_topic
    _tf_topic->_rviz_bag
    _play_bag->_rosout_topic
    _my_pcl_tutorial->_rosout_topic
    _rviz_bag->_rosout_topic
    _rosout_topic->_rosout
    _play_bag->_camera_rgb_points_topic
    _camera_rgb_points_topic->_my_pcl_tutorial
    _camera_rgb_points_topic->_rviz_bag}