feature: Dead Reckoning dis 7 implementation

[AleMart3]

This pull request implements dead reckoning algorithm for dis 7 version

[alessiomatricardi]

any update on this? It would be very helpful

[leif81]

@AleMart3 thank-you for the PR.

I have reviewed the PR. I have one concern which is the original perform_DR method is 300 lines of code, and the proposed new perform_DRv7 method is a copy of most of the original code. With the exception of the PDU type parameter. This will cause extra effort for the maintainers to ensure the two implementations are the same.

If we can find a way to add support for v7 that doesn't require duplicating the code I would prefer to see an updated PR for that.

[alessiomatricardi]

Hi, we refactored the implementation in the following way:

• Added an Interface IDeadReckoner which define the method performDeadReckoning
• Added an abstract implementation AbstractDeadReckoner which contains the common part of the algorithm and define all the abstract methods its children must implement. The common part of the algorithm has been generalized with a custom Model containing only the needed fields.
• 2 implementations of AbstractDeadReckoner for DIS v6 and v7 protocols: each one is responsible of the articulated parameters part of the algorithm, which is a bit tricky cause of different structure of the 2 EntityStatePdu
• modified DeadReckoner class which now only expose two methods (perform_DR and perform_DRv7) maintaining the previous signature (without breaking dependent packages when the dependency is updated).

Let us know what do you think about, we're very interested in merging it and (if possible) release the a version of this package.

Last but not least, all tests are invariated and seem to work :)

[alessiomatricardi]

PS for no reason I'm seeing something on pom.xml and both EntityStatePdu, but locally merge says its already updated :')

[leif81]

Thanky-you for the update @alessiomatricardi . I have been busy but I hope to review your change soon!