[Rock-dev] Fwd: Re: Fwd: Re: IMUSensor - temperature and inclinometers values

[Sylvain Joyeux]

On 09/27/2012 09:55 AM, Matthias Goldhoorn wrote:
> But where is the association between the transformer and the
> base::samples::temperature reading, there is no connection between then.
> In case for the imu you could _assume_ that the temperature sensor is in
> the imu. But i have other components that are spread over the system,
> and can multiple temperatures. So i don't see the relationship to the
> transformer. Okay you could use an transformation description to that
> you can display the temperature sensor inside of your system in
> vizkit3d, but the transformer also uses only strings, so if you add an
> string the transformer could be used for this. But i don't see the point
> that the string duplicates information....
This is the difference between having a separate channel for meta-data 
(as we do for the transformer) or embedding it in the data structure. If 
embedded in the data structure, you end up always sending the same 
information -- since the origin of the temperature does not change.

If you have a single component that generates multiple temperature 
readings, then either design a sample type that have multiple fields 
(and what-is-what is contained in the field name) or have multiple ports 
(and what-is-what is contained in the port name).
-- 
Sylvain Joyeux (Dr.Ing.)
Space & Security Robotics

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