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Implement DirectionsFromWithThreatThreshold into AI transport logic (F…
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…AForever#6003)

Co-authored-by: Aaron Warner <[email protected]>
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@relent0r @aaronwarner
relent0r and aaronwarner authored Jun 1, 2024
1 parent f80060e commit 1a2b254
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1 change: 1 addition & 0 deletions changelog/snippets/ai.6003.md
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- (#6003) Implement DirectionsFromWithThreatThreshold into default AI transport logic.
128 changes: 64 additions & 64 deletions lua/AI/Transportutilities.lua
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Expand Up @@ -975,7 +975,7 @@ function SendPlatoonWithTransports(aiBrain, platoon, destination, attempts, bSki
local ALLUNITS = categories.ALLUNITS
local TESTUNITS = ALLUNITS - categories.FACTORY - categories.ECONOMIC - categories.SHIELD - categories.WALL

local airthreat, airthreatMax, Defense, markerrange, mythreat, path, reason, pathlength, surthreat, transportcount,units, transportLocation
local airthreat, airthreatMax, Defense, mythreat, path, reason, pathlength, surthreat, transportcount,units, transportLocation

-- prohibit LAND platoons from traveling to water locations
if MovementLayer == 'Land' then
Expand Down Expand Up @@ -1043,70 +1043,72 @@ function SendPlatoonWithTransports(aiBrain, platoon, destination, attempts, bSki
end

-- a local function to find an alternate Drop point which satisfies both transports and platoon for threat and a path to the goal
local FindSafeDropZoneWithPath = function( platoon, transportplatoon, markerTypes, markerrange, destination, threatMax, airthreatMax, threatType, layer)
local FindSafeDropZoneWithPath = function( platoon, transportplatoon, destination, threatMax, airthreatMax, threatType, layer)

local markerlist = {}
local atest, stest
local landpath, landpathlength, landreason, lastlocationtested, path, pathlength, reason
-- locate the requested markers within markerrange of the supplied location that the platoon can safely land at
for _,v in markerTypes do
markerlist = TableCat( markerlist, AIGetMarkersAroundLocation(aiBrain, v, destination, markerrange, 0, threatMax, 0, 'AntiSurface') )
end
-- sort the markers by closest distance to final destination
TableSort( markerlist, function(a,b) local VDist2Sq = VDist2Sq return VDist2Sq( a.Position[1],a.Position[3], destination[1],destination[3] ) < VDist2Sq( b.Position[1],b.Position[3], destination[1],destination[3] ) end )

-- loop thru each marker -- see if you can form a safe path on the surface
-- and a safe path for the transports -- use the first one that satisfies both
for _, v in markerlist do
if lastlocationtested and TableEqual(lastlocationtested, v.Position) then
continue
end
-- locate the requested markers within 128 unit radius of the supplied location that the platoon can safely land at
local markerRadius = math.min(aiBrain.IMAPConfig.IMAPSize * 4, 164)
local markerlist = NavUtils.DirectionsFromWithThreatThreshold(layer, destination, markerRadius, aiBrain, NavUtils.ThreatFunctions.AntiAir, airthreatMax, aiBrain.IMAPConfig.Rings)
if not table.empty(markerlist) then
if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..transportplatoon.BuilderName.." Safe Drop radius is "..markerRadius.." number of positions to test is "..table.getn(markerlist))
end
-- sort the markers by closest distance to final destination
TableSort( markerlist, function(a,b) local VDist2Sq = VDist2Sq return VDist2Sq( a[1],a[3], destination[1],destination[3] ) < VDist2Sq( b[1],b[3], destination[1],destination[3] ) end )
-- loop thru each marker -- see if you can form a safe path on the surface
-- and a safe path for the transports -- use the first one that satisfies both
for _, v in markerlist do
if lastlocationtested and TableEqual(lastlocationtested, v) then
continue
end

lastlocationtested = TableCopy( v.Position )
-- test the real values for that position
stest, atest = GetRealThreatAtPosition( lastlocationtested, 80 )
lastlocationtested = TableCopy( v )
-- test the real values for that position
stest, atest = GetRealThreatAtPosition( lastlocationtested, 80 )

if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..transportplatoon.BuilderName.." examines position "..repr(v).." "..repr(lastlocationtested).." Surface threat "..stest.." -- Air threat "..atest)
end

if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..transportplatoon.BuilderName.." examines position "..repr(v.Name).." "..repr(lastlocationtested).." Surface threat "..stest.." -- Air threat "..atest)
end

if stest <= threatMax and atest <= airthreatMax then
landpath = false
landpathlength = 0
-- can the platoon path safely from this marker to the final destination
landpath, landreason, landpathlength = NavUtils.PathToWithThreatThreshold(layer, destination, lastlocationtested, aiBrain, NavUtils.ThreatFunctions.AntiAir, threatMax, aiBrain.IMAPConfig.Rings)
-- can the transports reach that marker ?
if landpath then
path = false
pathlength = 0
path, reason, pathlength = NavUtils.PathToWithThreatThreshold('Air', lastlocationtested, GetPlatoonPosition(platoon), aiBrain, NavUtils.ThreatFunctions.AntiAir, airthreatMax, aiBrain.IMAPConfig.Rings)
if path then
if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." gets path to "..repr(destination).." from landing at "..repr(lastlocationtested).." path length is "..pathlength.." using threatmax of "..threatMax)
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." path reason "..landreason.." route is "..repr(landpath))
end
return lastlocationtested, v.Name
else
if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." got transports but they cannot find a safe drop point")
end
end
if stest <= threatMax and atest <= airthreatMax then
landpath = false
landpathlength = 0
-- can the platoon path safely from this marker to the final destination
landpath, landreason, landpathlength = NavUtils.PathToWithThreatThreshold(layer, destination, lastlocationtested, aiBrain, NavUtils.ThreatFunctions.AntiSurface, threatMax, aiBrain.IMAPConfig.Rings)
-- can the transports reach that marker ?
if landpath then
path = false
pathlength = 0
path, reason, pathlength = NavUtils.PathToWithThreatThreshold('Air', lastlocationtested, GetPlatoonPosition(platoon), aiBrain, NavUtils.ThreatFunctions.AntiAir, airthreatMax, aiBrain.IMAPConfig.Rings)
if path then
if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." gets path to "..repr(destination).." from landing at "..repr(lastlocationtested).." path length is "..pathlength.." using threatmax of "..threatMax)
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." path reason "..landreason.." route is "..repr(landpath))
end
return lastlocationtested
else
if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." got transports but they cannot find a safe drop point")
end
end
end
if platoonpath then
lastlocationtested = false
for k,v in platoonpath do
stest, atest = GetRealThreatAtPosition( v, 80 )
if stest <= threatMax and atest <= airthreatMax then
lastlocationtested = TableCopy(v)
end
end
if lastlocationtested then
if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." using platoon path position "..repr(v) )
end
return lastlocationtested, 'booga'
end
end
end
if platoonpath then
lastlocationtested = false
for k,v in platoonpath do
stest, atest = GetRealThreatAtPosition( v, 80 )
if stest <= threatMax and atest <= airthreatMax then
lastlocationtested = TableCopy(v)
end
end
if lastlocationtested then
if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." using platoon path position "..repr(v) )
end
return lastlocationtested, 'booga'
end
end
end
end
return false, nil
Expand Down Expand Up @@ -1141,17 +1143,15 @@ function SendPlatoonWithTransports(aiBrain, platoon, destination, attempts, bSki
-- if the destination doesn't look good, use alternate or false
if surthreat > mythreat or airthreat > airthreatMax then
if (mythreat * 1.5) > surthreat then
-- otherwise we'll look for a safe drop zone at least 50% closer than we already are
markerrange = VDist3( GetPlatoonPosition(platoon), destination ) * .5
if TransportDialog then
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." carried by "..transportplatoon.BuilderName.." seeking alternate landing zone within "..markerrange.." of destination "..repr(destination))
LOG("*AI DEBUG "..aiBrain.Nickname.." "..repr(platoon.BuilderName).." carried by "..transportplatoon.BuilderName.." seeking alternate landing zone of destination "..repr(destination))
end
transportLocation = false
-- If destination is too hot -- locate the nearest movement marker that is safe
if MovementLayer == 'Amphibious' then
transportLocation = FindSafeDropZoneWithPath( platoon, transportplatoon, {'Amphibious Path Node','Land Path Node','Transport Marker'}, markerrange, destination, mythreat, airthreatMax, 'AntiSurface', MovementLayer)
transportLocation = FindSafeDropZoneWithPath( platoon, transportplatoon, destination, mythreat, airthreatMax, 'AntiSurface', MovementLayer)
else
transportLocation = FindSafeDropZoneWithPath( platoon, transportplatoon, {'Land Path Node','Transport Marker'}, markerrange, destination, mythreat, airthreatMax, 'AntiSurface', MovementLayer)
transportLocation = FindSafeDropZoneWithPath( platoon, transportplatoon, destination, mythreat, airthreatMax, 'AntiSurface', MovementLayer)
end
if transportLocation then
if TransportDialog then
Expand Down

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