nearest group to another... need scripting help

[chromium]

Hi all, I need help with this script:

 

 

 

 

RedGroundAIsimulator = true

 

--- Exec text part

local group_tag = "IFV" -- cambia usando il groupType, o meglio il vehicle.

local group_radius = 300

local group_roadDisable = nil

local groupName = ""

local groupData = ""

local pointObj = ""

local Point_ObjTag = "AA"

local Point_groupName = ""

if RedGroundAIsimulator = true then

for groupName, groupData in pairs(mist.DBs.groupsByName) do --List of groups by name

if string.find(groupName,group_tag) then --searches for prefix within group names

local groupToMove = groupName

 

if string.find(groupName,Point_ObjTag) then --searches for prefix within group names

Point_groupName = groupName

pointObj = Unit.getByName(Point_groupName):getPosition().p

 

--HELP NEEDED HERE, HOW TO CHOOSE THE NEAREST "Point_groupName" for any groupToMove one?

 

end

mist.groupToRandomPoint({group = Group.getByName(groupToMove), point = pointObj, radius = group_radius, disableRoads = group_roadDisable,})

end

end

end

 

this should be a structure that make the MIST groupToRandomPoint function to work with any group that have the "IFV" tag in its name.

 

The objective is to make any groups with the tag to move to the nearest unit that have the tag "AA" in its name (those units will be simple infantry man placed in cities or area objective... they simply act as scenario objective for ground troops.)

 

but I miss how to choose the nearest group with "AA" tag for every "IFV" group.

 

Can somebody help me?

 

thanks and merry christmas ;)

[SNAFU]

I am pretty sure there are thousend better ways of getting what you need, but I usually use the iterative loop approach simply constructed with for-do-if comparisons, f.e.:

 

This function returns the closest trigger zone with the name actualzonename1,2,...,n like "combatzone1" for the unitsposition defined with actualhelipos.

 

    closestzonetable = {}

   for i = 1, numberofzones
   do
       actualzone = trigger.misc.getZone(actualzonename..string.format(i))
       if actualzone == nil 
           then
           trigger.action.outText("ERROR: actualzone == nil ", 4000)
           return
       end    

       actualzonepos = {}
       actualzoneposx = actualzone.point.x
       actualzoneposz = actualzone.point.z

       actualoffset = math.sqrt((actualzoneposx - actualhelipos.x)*(actualzoneposx - actualhelipos.x) + (actualzoneposz - actualhelipos.z)*(actualzoneposz - actualhelipos.z)) 

       if i == 1
           then
               minimumoffset = actualoffset
               closestzone = actualzonename..string.format(i)
               zoneradius = actualzone.radius
       elseif i > 1 and minimumoffset > actualoffset
           then 
               minimumoffset = actualoffset
               closestzone = actualzonename..string.format(i)
               zoneradius = actualzone.radius
       end
   end

   closestzonetable = 
                           {
                           name = closestzone,
                           distance = minimumoffset, 
                           radius = zoneradius
                           }
   local closestzonetableprintout = mist.utils.tableShow(closestzonetable)    
   --trigger.action.outText("closest zone: " ..closestzonetableprintout, 5)--ok

 

Since I didn´t totally understand the CTTS script, I wrote my own transport script for helis and the part above was taken from that script you see in the attachement.

un_loadingheli_v31m2.lua

[chromium]

thanks, I'll take a look asap :).

[Grimes]

One way is to brute force it, iterate through all known groups and see which is closest. The other way is to use world.searchObjects() to narrow the total number of groups to search down and then brute force it.

[chromium]

Can you give me an example? (even if simplified or already included in something else)?

 

thanks in advance :)

[Zayets]

What Grimes says is to use function getGroups from coalition

 

coalition.getGroups(enum coalition.side coalition, enum Group.Category groupCategory or nil)

 

so that you have the list of all groups known from a coalition. Then you loop through all of these in a for - do loop and assign WITHIN the loop a variable called (say) minimumDistance. You will override this one ONLY if the currently read distance to the currently read group is lower than previously stored value. You will have to initialize this variable with a fairly large number.

 

Hope that helps.

[pappavis]

I want to determine the bearing from my Player tyo another unit. Does such function exist?

[Zayets]

Not directly but there's a couple of neat functions in MIST. First, you must get the position of the unit the player is controlling. That's easily done with :

 

Vec3 function Object.getPoint(Object self)

 

Once you identified that you can call one of these functions to display (you can also control to whom you may show this message) the BR/BRA message :

 

mist.msgBR or mist.msgBRA

 

Hope that helps.

[pappavis]

Not directly but there's a couple of neat functions in MIST. First, you must get the position of the unit the player is controlling. That's easily done with :

 

Vec3 function Object.getPoint(Object self)

 

Once you identified that you can call one of these functions to display (you can also control to whom you may show this message) the BR/BRA message :

 

mist.msgBR or mist.msgBRA

 

Hope that helps.

 

 

I'm a bit inexperienced.

 

What I have;

* My own unit's poistion X Y coordinates

* The target unit X Y coordinates

 

How do i apply Vec3 function Object.getPoint(Object self) on the above knowns? Sum code would be very appreciated.

[Zayets]

Should be something like that (I am not at home now so I can't check working so you may have to fiddle a bit with it) :

 

myUnit = Unit.getByName('My Unit Name')

otherUnit = Unit.getByName('The Other Unit Name')

unitPosn = myUnit:getPoint()

mist.msgBR({otherUnit},{unitPosn}, true, true, 'BR message: ', 10, {coa = {'all'}})

[pappavis]

Should be something like that (I am not at home now so I can't check working so you may have to fiddle a bit with it) :

 

mist.msgBR({otherUnit},{unitPosn}, true, true, 'BR message: ', 10, {coa = {'all'}})[/i]

 

Thanx,

 

I do something wrong. The mist.msgBR doesnt execute. The line

Here is my code. Could be becos 'unitpos' isnt a vec3?

 

 

			local units = group:getUnits()
			local comp = {}
			local groupMin = maxDistance
			for j=1,#units do
				local unit = units[j]
				if unit ~= nil then
					local unitpos = unit:getPoint()
					local typename = unit:getTypeName()
					table.insert(comp, typename)
					local dist = GetDistance(unitpos.x, unitpos.z, playerpos.x, playerpos.z)
					local altitude1 = unitpos.y
					if dist < groupMin then
						groupMin = dist
					end
					if (dist > 0) then						
						-- get coordinates, and display ingame
						local tableBR1 = {units = units, ref = unitpos, alt = true, metric = true, text = ' BR message: ', displayTime = 10, msgFor = {coa = {'all'}} }
						if tableBR1 ~= nil then
							trigger.action.outText("DEBUG: tableBR1 ~= nil", 2)
							local sXYcoords1 = mist.msgBR(tableBR1)
							trigger.action.outText("DEBUG: sXYcoords1=" .. sXYcoords1, 5)
						end												
					end
				end
			end

Edited December 27, 2013 by pappavis

[Zayets]

getPoint returns a Vec3. You can actually outtext its values (x,y,z) because it's a simple table. Also, you can get the BR string with mist.getBRString . If function does not fire at all but does not give any error then all types are correct.

[pappavis]

getPoint returns a Vec3. You can actually outtext its values (x,y,z) because it's a simple table. Also, you can get the BR string with mist.getBRString . If function does not fire at all but does not give any error then all types are correct.

 

 

Indeed, no error. However, the debug output text doesnt proceed beyond this so something is wrong.

 

local sPos4 = mist.getBRString( {units = units, ref = unitpos, alt = true, metric = true} )

 

Assuming unitpos is a vec3, could the problem be in my way of defining a table?

Edited December 27, 2013 by pappavis

[chromium]

Ok, after some test and time I found a way to get the script working, but it doesen't work exactly as intende.

 

The code is attached, the problem IMHO is between line 52 and 74. But I can't solve it :(

 

The script, once loaded, choose any ground group which has the tag "IFV" in its name and (should) move it to the nearest unit of any group which has "OBJ" in its name (for testing "OBJ" group is only one, made of units, dispersed in the map).

 

Well, the script load and start to move "IFV" group to one units of the group "OBJ", but not the nearest: the latest one.

 

Any suggestion to rectify those lines, that was a copy and paste of SNAFU suggestion, is really appreciated. I also thanks Grimes and Zayets, but I'm not expertize enought to write the code you suggested, any try I made was not succesful :).

AutoAdvance_rev04.lua

[chromium]

I found a fix and I optimized the above script a lot making it a function, I have to add another working logic and then if someone could find it useful I'll post it here :)