[ros-users] transformPointCloud

[David Fischinger]

Hallo Sabrina, Dejan, Jack and Michael,

thanks a lot for the help and the explanation!

Regards
David

2011/4/6 Dejan Pangercic <dejan.pangercic at gmail.com>:
> Jack, Michael,
>
> this of course makes perfect sense - thanks a lot for the clarification.
> D.
>
> On Wed, Apr 6, 2011 at 12:15 AM, Michael Ferguson <mfergs7 at gmail.com> wrote:
>> The issue is that TF output is streamed to each node, and is buffered in the
>> listener -- if you create the listener inside the callback, you have no
>> history of tf data before creation -- which means you often can't find the
>> lookup you desire.
>>
>> -Mike
>>
>> On Tue, Apr 5, 2011 at 6:10 PM, Jack O'Quin <jack.oquin at gmail.com> wrote:
>>>
>>> On Tue, Apr 5, 2011 at 5:05 PM, Dejan Pangercic
>>> <dejan.pangercic at gmail.com> wrote:
>>> > Hi Sabrina,
>>> >
>>> >> you should instantiate the TransformListener outside the callback:
>>> >>
>>> >> tf::TransformListener *tf_listener;
>>> > this is very interesting. But do you know why would it be necessary to
>>> > have it outside the callback? Is there a documentation about this?
>>>
>>> I believe the destructor for the listener will shut down the connection.
>>>
>>> Many ROS interfaces use the RAII approach.
>>> --
>>>  joq
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>>
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>
>
>
> --
> MSc. Dejan Pangercic
> PhD Student/Researcher
> Intelligent Autonomous Systems Group
> Technische Universität München
> Telephone: +49 (89) 289-26908
> E-Mail: dejan.pangercic at cs.tum.edu
> WWW: http://ias.cs.tum.edu/people/pangercic
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