Re: [Jsbsim-devel] Property ICs

[Tim H. <tim...@or...>]

Jon,

Perhaps I missed the initial email trail... apologies.

Are you implementing this in order to force simple properties to have a
known value prior to execution? 

Would this be an optional property creation mechanism?

Currently the following is an example of what I do within the scripts:
<property> simulation/tail_number </property>
<set name="simulation/tail_number" value="12345"/>

I see the value of property initialization - everything has a known start
value. And... it might be very nice to "reset" to initial values at anytime
during the execution of the simulation without having to expressly stop and
restart.

A footnote: some of my recent scripts use properties that need to have their
initial values calculated due to dependencies other property values.

eh... It's all good - either format would work for me. 

--
Tim


-----Original Message-----
From: jsb...@li...
[mailto:jsb...@li...] On Behalf Of Jon S.
Berndt
Sent: Monday, September 17, 2007 10:49 PM
To: JSBSim Developer List
Subject: [Jsbsim-devel] Property ICs

It is valuable to be able to create properties and give them initial values.
This is most important for JSBSim in the scripts or in the flight_control
(or systems) sections of the configuration file (for interface properties).
There are two ways I can think of to code this in XML:

1)
    <property initial_value="3123"> simulation/run_id </property>

2)
    <property>
      <initial_value> 3123 </initial_value>
      simulation/run_id
    </property>

IMHO, the first one is better, and much less verbose, as well. Any opinions?

Jon



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