[ros-users] [rviz] Displaying informations

Nicolas nicolas at shadowrobot.com
Fri May 14 14:30:40 UTC 2010

Hi Josh and thank you for your answers.

To display TEXT_VIEW_FACING markers, I thought that it would be a good
idea to start with the "basic shapes" tutorial on the wiki, and then to
adapt the C++ file to get "dynamic" text instead of shapes shifting
every second. Unfortunately for me I was right :(

I followed step by step the tutorial, creating my package, implementing
basic_shapes.cpp, building and running the code. Everything went
perfectly well, but my rviz does not display any shape. I checked with
rxgraph that everything was connected and I echoed the
visualization_marker node to check the informations that rviz receives.
Here is an exemple of the echo result: 

  seq: 176
  stamp: 0
  frame_id: /my_frame
ns: basic_shapes
id: 0
type: 3
action: 0
    x: 0.0
    y: 0.0
    z: 0.0
    x: 0.0
    y: 0.0
    z: 0.0
    w: 1.0
  x: 1.0
  y: 1.0
  z: 1.0
  r: 0.5
  g: 0.5
  b: 0.5
  a: 0.5
lifetime: 0
points: []

Is everything OK ? I cannot figure what the error is, and my rviz still
doesn't display any shape.



Le jeudi 13 mai 2010 à 10:35 -0700, Josh Faust a écrit :
> Hi Nicolas,
> rviz 1.1 includes a TEXT_VIEW_FACING marker, as well as an option to
> keep a marker relative to a frame (frame_locked).
> Do you mean dynamically change the color of one of the robot model
> links?  No, there is currently no way of doing that.  Another option
> is that 1.1 also contains a MESH_RESOURCE marker, so you could create
> a mesh of the same type as that link, make it slightly larger and
> possibly transparent, and set its color.
> Josh
> On Thu, May 13, 2010 at 8:25 AM, Nicolas <nicolas at shadowrobot.com>
> wrote:
>         Hello ROS community,
>         I am currently trying to display through rviz some
>         informations about my
>         robot model (a too high temperature for instance), and I don't
>         really
>         find a good way to do it. Is there a possibility to display
>         informations
>         as a floating text next to the <link> the informations are
>         about ? Or a
>         way to dynamically change the color of a texture ? And if it
>         is not
>         possible yet, is it planned to be possible in a future
>         release ?
>         Thanks in advance,
>         Nicolas
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