Artillery firing flag

[Dave317]

Is there a way of making a flag true when an artillery unit fires? I can command the artillery to fire easily enough but I wanted to send a message when it actually fires. I thought about 'bomb in zone' and 'missile in zone' but artillery rounds aren't included in the list.

[EasyEB]

Eventhandlers is the way to go.

[Dave317]

Sounds a bit complicated.

[feefifofum]

Yep...that's the rabbit hole in a nutshell.

The question is, how far down do you want to go? :lol:

[Dave317]

Where is the best place to start?

[Pikey]

http://wiki.hoggit.us/view/DCS_func_addEventHandler

[Dave317]

I saw that Pikey. Can't work out what do do with the information though.

[apolloace]

You will need some programming language experience to write scripts & use the DCS Scripting Environment.

 

-> Search Lua Scripting language on the net. First go through it.

 

Then -> Go to top of mission builders forum to the Sticky Topics - MIST & MOOSE.

 

Then you will be ready to start.

 

There is a learning curve involved, but I am sure you will enjoy it. :)

 

[Dave317]

Struggling with this but I'd like to work it out. I'm completely new to any kind of scripting and would really appreciate if someone could explain in layman's terms exactly what I need to do. Better yet would it be possible to create a simple mission where a flag is true once a unit fires so I can pick it apart and learn from that.

[apolloace]

Check out this thread:

 

https://forums.eagle.ru/showthread.php?t=107712

 

[Wrecking Crew]

Here's an event handler example. I made this with a lot of help from the folks here. Put this into a Once event, with Condition like Time More (5), and Action Do Script with this code in it.

 

do
local function detectClientTakeoff(event)
 local function contains(tbl, val)
  for _,v in ipairs(tbl) do
   if v == val then return true end
  end
  return false
 end
 if(event.id == world.event.S_EVENT_TAKEOFF and event.initiator) then
  local airborneUnitName = event.initiator:getName()
  if(contains({'F-15C 01', 'F-15C 02', 'F-15C 03', 'F-15C 04', 'M-2000C 01', 'M-2000C 02', 'M-2000C 03', 'M-2000C 04', 'AJS37 Viggen 01', 'AJS37 Viggen 02', 'AJS37 Viggen 03', 'AJS37 Viggen 04'}, airborneUnitName)) then
   trigger.action.setUserFlag(50003, true)
   trigger.action.outText(airborneUnitName .. ' just tookoff!', 5)
  end
 end
end
mist.addEventHandler(detectClientTakeoff)
end

[Dave317]

I've spent so much time on this and still can't get my head around it! Would someone please be kind enough to make a very simple script where if a 155mm HE shell is fired it will turn a flag to true.

[Looney]

There are at least two pages you should read up:

 

http://wiki.hoggit.us/view/DCS_func_addEventHandler

 

and

 

http://wiki.hoggit.us/view/DCS_event_shot

 

With those two, you should then find the ID which a 155mm shell has and note it down.

 

After that, start working on (pseudo) code

 

So, when a 155mm shell is fired, find out who fired it and if the side (blue or red) is correct, set a flag.

 

With Wrecking_crew's example and the above pages, coupled with some .LUA tutorial should give you enough tools to come up with a basic flow of LUA scripting. If that fails, post what you have and I'm sure the people here will help you out.

[Dave317]

This is all I could come up with. Pretty sure it is completely wrong.:cry:

 

 

 

 

do
local function S_EVENT_SHOT:onEvent(event)
   if event.id == world.event.S_EVENT_SHOT then
       if wpnType == “155mm HE” then
           trigger.action.setUserFlag(10, true)
       end
   end
end
world.addEventHandler(S_EVENT_SHOT)
end

ARTY script test 3.lua

Edited April 26, 2017 by Dave317

[Looney]

You're getting there :)

 

The output of S_EVENT_SHOT is a table according to http://wiki.hoggit.us/view/DCS_event_shot

 

So, that table is filled and returned at every shot. What you need to do is check if an entry in that table matches the correct weapon.

 

Event = {

id = 1,

time = 14:00:25,

initiator = M109,

weapon = 155HE

}

 

Up front, I'm no LUA expert but from pseudo code, you can get a good idea of where you need to go with any code.

 

On S_EVENT_SHOT

Check the line weapon in the table to see if it matches 155mmHE (or whatever code used for artillery). Alternatively, you may want to check the initiator to see if it matches any artillery unit you want to track.

 

If that weapon or unit type matches what we want, set flag XX to YY

End

 

Alternatively, you can have the eventhandler cough up a number which you then use to set a flag so you can check wether that flag has already been set or, if you really want to, add that event to a flag via a counter.

[Igneous01]

Moose is easier to use for this

 

EHMortarShot = EVENTHANDLER:New() 
EHMortarShot:HandleEvent( EVENTS.Shot )

function EHMortarShot:OnEventShot( EventData )
       -- this checks if the group name that fired was called 'Mortar1' (defined in mission editor)
if (EventData.IniDCSGroupName == "Mortar1") then
	--set your flag here, do whatever
end
end

[Dave317]

It looks like this checks which group fired rather than what weapon. Is this right?

[Igneous01]

It looks like this checks which group fired rather than what weapon. Is this right?

 

yes in my case I'm handling the shot event for specific artillery groups.

 

If you want to check for any artillery group, there is a way to do so with Moose by checking the EventData.WeaponCategory or EventData.Weapon properties

 

you can read more about all the properties returned here:

 

http://flightcontrol-master.github.io/MOOSE/Documentation/Event.html##(EVENTDATA)