Re: [Jsbsim-devel] Multi-body modeling

[Andreas G. <a....@we...>]

Hello everybody,

Am 05.01.2011 14:24, schrieb Jon S. Berndt:
> [...] where a state could be passed from the "core" instance, to other
> instances. 
if you mention a core instance, I can't help but think about a single
property tree maintained by the core, where each child instance keeps
its own subtree instead of having its own separate one. By allowing
access (probably read-only) to the other instance's realms, one could
eliminate the need for passing states between the instances.

Code-wise, this might possibly be realized by calling the child
instances as shared objects from the core instance, as a kind of plugin.

Having a common database available seems to be a big issue in today's
simulation industry, I remember the subject popping up various times, e.g.
http://www.aviationweek.com/aw/generic/story.jsp?id=news/awst/2010/11/29/AW_11_29_2010_p40-271623.xml&channel=defense
The standard for the CDB mentioned in the article is available here:
http://www.presagis.com/files/standards/CDB-Specification-v31.zip
(42 MB).
If JSBSim needs to support such complexity is of course something that
needs to be discussed, and CDB is quite an overshoot on the subject of
multi-body modeling. However, a common property tree sounds quite appealing.

Just talking a bit at large,

	Andreas