[Rock-dev] Problems with ROS-Bridge nav_msgs/OccupancyGrid

[Janosch Machowinski]

Okay, I manged to work around
this issue, but the whole ros bridge seems
to be not functional.
For example, if I try to subscribe to /tf I get this error:
/home/coyote/rock1408/tools/orocos.rb/lib/orocos/ros/node.rb:267:in 
`input_port': cannot find topic /tf as a subscription of node 
/stereo_odometer (Orocos::NotFound)

If I can mange to subscribe to a topic, no sample
is displayed. I use this script :

require 'orocos'
include Orocos
Orocos.initialize
#this works, I can see all topics
puts(Orocos::ROS.name_service().ros_graph.topics)
ros_topic = Orocos::ROS.topic(ARGV.first)
reader = ros_topic.reader(:type => :buffer, :size => 10)
puts("Waiting for samples")
while(true)
     sample = nil
     while((sample = reader.read_new()) == nil)
         sleep(0.1)
     end

     puts("Got sample #{sample}")
end

Greetings
     Janosch

On 09/11/2014 11:15 AM, Janosch Machowinski wrote:
> Hey,
> I am trying to get an input port of the type
> nav_msgs/OccupancyGrid. For now I did :
>
> using_library "nav_msgs"
> using_library "envire"
> import_types_from "nav_msgs/OccupancyGrid.h"
> typekit.ros_mappings 'std/vector</envire/BinaryEvent>' =>
> '/nav_msgs/OccupancyGrid'
>
> and defined an input port
> input_port "rosOccupancyGrid", "/nav_msgs/OccupancyGrid"
>
> But orogen is complaining, it does not know about the type
> /nav_msgs/OccupancyGrid. Also no toROS/fromROS stub in
> the typekit folder is generated (there is no typkit folder at all...)
> Any ideas ?
> Greetings
>       Janosch
>
> P.S: This is kind of urgent...
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