27 May
2015
27 May
'15
6:31 p.m.
On Tue, May 26, 2015 at 6:35 AM Serge Stinckwich <serge.stinckwich(a)gmail.com>
wrote:
Yes, you can represent the data in the visualization, but still with rviz I
can't see how you can have direct access to the data from the
visualization. At least, I can't see how you can do something like we did
we the laser scan in rviz -showing information about the area of detection
and other things we have in mind ;)-
Having a robotic data viz engine that could be extended with ROASSAL
On Mon, May 25, 2015 at 4:48 PM, Miguel Campusano
<mcampusa(a)dcc.uchile.cl> wrote:
Right, I have seen that a long time ago but I forgot it :( .
But still it holds the idea that rviz focuses on representing the data in
the environment (drawing the map for example) rather than the data itself
(in a point of time, what was the distance between the robot and the
nearest wall)
Rviz is a good visualization, but it focuses on a
representing the data
in a
3d environment. Rviz, in my experience,
represents the interactions of
the
robot (with its sensors) in the environment, you
can draw maps and do a
lot
of things.
rviz is not only for 3D but also for 2D viz. Look at this video for
example:
http://wiki.ros.org/navigation/Tutorials/Using%20rviz%20with%20the%20Naviga…
However, rviz does not provide access to the data
itself. Long history
short, while I can see there is an object with the laser scan at a
certain
distance, I can not see the actual distance of
the object. Sometimes we
want
more info about the data to see what values are
best suited to use in our
programs.
Yes, you are right rviz does not provide access to the data and is
quite difficult to customize to specific needs.
You have to write plugins in order to add more visualisations. scripting could be nice.
This is what you are trying to do ?
Our main focus is, for every different sensor, understand the data
separately and use that data in algorithms and programs in a live
programming context. For example, for us, having the distance of an object
with the laser scan has a great value because we can determine the best
suited distance to take different actions. After the actions are
implemented, you can see with the visualization if the actions are being
done at the right moment.
But I can not denied that having a robotic data viz engine extensible with
roassal scripting would be cool.