Behaviours - Artillery - Add more options for firing artillery

[astruyk]

Would be nice to have a little more control over the artillery firing modes.

Was thinking something like these

• Firing Speed - Choose the delay between shots in a volley
  • Something like 'Slow', 'Medium', 'Full'
• Spread - Choose how tightly the shot grouping will be.
  • Something like 'Exact', 'Tight', 'Loose', 'Wide'

If time permits:

• Mode - Choose between some special firing modes
  • Point (default) - Will fire directly at the target
  • Line Advancing - Will fire in a line centered on the target starting close to the unit and moving away
  • Line Retreating - Same as advancing but moving towards the unit instead of away
  • Line Left to Right - Same as advancing except moving left to right
  • Line Right to Left - Same as advancing except moving right to left
  • Spotted - Fire a single round and then after a pause fire the remaining rounds

[JonasJurczok]

Some other ideas:

• Store a history of fire missions for review
• Let Zeus repeat fire missions from the history
• Configure a "Time on Target" fire mission. Battery executes automatically
• Show an overlay timer for first round impact to notify JTAC/FOB accordingly.
• Allow fire missions to be targeted on existing artillery targets