[Freeciv-Dev] (PR#3549) SDI Defence as Orbital Warfare

["Rafa³ Bursig" <bursig@xxxxxxxxx>]

Hi

IMHO Alpha Centauri Nuke defence model is better that current use by 
freeciv.

Current SDI Defence imprv. give city immunity to nuke attack.

In AC this nuke defence is supported by "Orbital Defence Platforms" 
which are deployed when nuke attack city and can't be used untill new 
turn will happend.
(practicaly can but secound use of it will destroy this ODP).
Simply when Player have 2 ODP, his cities can handle 2 nuke attacts 
without harm in this tun ( or next 2 attack with lost both ODP )

In AC those ODP can kill each others (what is count as "deploy") and 
kill nuke defence other player.

In Freeciv we can implement it in two ways:

1) add 2 counters (deployed, buid) to impr. SDI Deffece effect. and 
allow multi-build this imprv. by city.
This link those "SDI Orbital Deffece" with buider city and support 
defence only to this city, but allow pay unkeep for each "SDI OD" by 
this city.
Each city will have own nuke defence ( semi-current system ) by won't 
be total imunity to nuke attack.

2) add semi-wonder "SDI Orbital Defence" (small wonder ?- can be build 
by each player) effect that can be build in city but have effect on 
other cities. In this way we can have nuke defence to all our cities ( 
even new build ) or support this defence to other players, ("lend") 
which don't have this tech level.

Rafal