Gammon Forum

Current Coordinates: 20, 8
Ammo: (8, 10), (6, 4), (6, 7), (13, 5), (9, 4), (16, 1), (10, 7), (20, 1), (18, 6), and (4, 2)

<triggers>
  <trigger
   enabled="y"
   group="mapammo"
   ignore_case="y"
   keep_evaluating="y"
   match="Current Coordinates: *, *"
   name="curco"
   send_to="12"
   sequence="100"
  >
  <send>

me = { x = %1, y = %2 }
mobs = mobs or { }  -- in case no mobs

-- find closest

closest_distance = nil
closest_mob = nil

for k, v in ipairs (mobs) do
  
  -- calculate distance to me

  distance = math.sqrt ((me.x - v.x)^2 + (me.y - v.y)^2)
  if not closest_distance then
    -- first time
    closest_distance = distance
    closest_mob = v
  else
    -- record this if it is closer
    if distance &lt; closest_distance then
      closest_distance = distance
      closest_mob = v
    end -- if
  end -- if
  print (string.format ("%%s is %%0.1f km away", v.name, distance))
end -- for

if closest_mob then
  print (string.format ("Closest is %%s at (%%i, %%i)",
         closest_mob.name, closest_mob.x, closest_mob.y))
else
  print ("No aircraft nearby")
end -- if

</send>
  </trigger>
</triggers>

<triggers>
  <trigger
   group="mapammo"
   keep_evaluating="y"
   match="Ammo: *"
   name="ammoco"
   omit_from_output="y"
   send_to="12"
   sequence="100"
  >
  <send>mobs = { }  -- table of mobs

function processMob (name, x, y)
  -- get rid of comma from previous mob
  name = string.gsub (name, "^, ", "")
  -- insert into table
  table.insert (mobs, { name = name, x = x, y = y } )
end -- processMob 

-- split wildcard into individual mobs
string.gsub ("%1", "(.-) %((%d+), (%d+), ", processMob)
</send>
  </trigger>
</triggers>