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276 lines
10 KiB
Lua
276 lines
10 KiB
Lua
--- **Functional** -- Make SAM sites execute evasive and defensive behaviour when being fired upon.
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--
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-- ===
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--
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-- ## Features:
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--
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-- * When SAM sites are being fired upon, the SAMs will take evasive action will reposition themselves when possible.
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-- * When SAM sites are being fired upon, the SAMs will take defensive action by shutting down their radars.
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--
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-- ===
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--
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-- ## Missions:
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--
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-- [SEV - SEAD Evasion](https://github.com/FlightControl-Master/MOOSE_MISSIONS/tree/master/SEV%20-%20SEAD%20Evasion)
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--
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-- ===
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--
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-- ### Authors: **FlightControl**, **applevangelist**
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--
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-- Last Update: April 2021
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--
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-- ===
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--
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-- @module Functional.Sead
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-- @image SEAD.JPG
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--- @type SEAD
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-- @extends Core.Base#BASE
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--- Make SAM sites execute evasive and defensive behaviour when being fired upon.
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--
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-- This class is very easy to use. Just setup a SEAD object by using @{#SEAD.New}() and SAMs will evade and take defensive action when being fired upon.
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--
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-- # Constructor:
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--
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-- Use the @{#SEAD.New}() constructor to create a new SEAD object.
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--
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-- SEAD_RU_SAM_Defenses = SEAD:New( { 'RU SA-6 Kub', 'RU SA-6 Defenses', 'RU MI-26 Troops', 'RU Attack Gori' } )
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--
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-- @field #SEAD
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SEAD = {
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ClassName = "SEAD",
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TargetSkill = {
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Average = { Evade = 30, DelayOn = { 40, 60 } } ,
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Good = { Evade = 20, DelayOn = { 30, 50 } } ,
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High = { Evade = 15, DelayOn = { 20, 40 } } ,
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Excellent = { Evade = 10, DelayOn = { 10, 30 } }
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},
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SEADGroupPrefixes = {},
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SuppressedGroups = {},
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EngagementRange = 75 -- default 75% engagement range Feature Request #1355
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}
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-- TODO Complete list?
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--- Missile enumerators
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-- @field Harms
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SEAD.Harms = {
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--[[
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["X58"] = "weapons.missiles.X_58", --Kh-58X anti-radiation missiles fired
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["Kh25"] = "weapons.missiles.Kh25MP_PRGS1VP", --Kh-25MP anti-radiation missiles fired
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["X25"] = "weapons.missiles.X_25MP", --Kh-25MPU anti-radiation missiles fired
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["X28"] = "weapons.missiles.X_28", --Kh-28 anti-radiation missiles fired
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["X31"] = "weapons.missiles.X_31P", --Kh-31P anti-radiation missiles fired
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["AGM45A"] = "weapons.missiles.AGM_45A", --AGM-45A anti-radiation missiles fired
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["AGM45"] = "weapons.missiles.AGM_45", --AGM-45B anti-radiation missiles fired
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["AGM88"] = "weapons.missiles.AGM_88", --AGM-88C anti-radiation missiles fired
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["AGM122"] = "weapons.missiles.AGM_122", --AGM-122 Sidearm anti-radiation missiles fired
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["LD10"] = "weapons.missiles.LD-10", --LD-10 anti-radiation missiles fired
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["ALARM"] = "weapons.missiles.ALARM", --ALARM anti-radiation missiles fired
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["AGM84E"] = "weapons.missiles.AGM_84E", --AGM84 anti-radiation missiles fired
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["AGM84A"] = "weapons.missiles.AGM_84A", --AGM84 anti-radiation missiles fired
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["AGM84H"] = "weapons.missiles.AGM_84H", --AGM84 anti-radiation missiles fired
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--]]
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["AGM_88"] = "AGM_88",
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["AGM_45"] = "AGM_45",
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["AGM_122"] = "AGM_122",
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["AGM_84"] = "AGM_84",
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["AGM_45"] = "AGM_45",
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["ALARN"] = "ALARM",
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["LD-10"] = "LD-10",
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["X_58"] = "X_58",
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["X_28"] = "X_28",
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["X_25"] = "X_25",
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["X_31"] = "X_31",
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["Kh25"] = "Kh25",
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}
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--- Creates the main object which is handling defensive actions for SA sites or moving SA vehicles.
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-- When an anti radiation missile is fired (KH-58, KH-31P, KH-31A, KH-25MPU, HARM missiles), the SA will shut down their radars and will take evasive actions...
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-- Chances are big that the missile will miss.
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-- @param #SEAD self
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-- @param table{string,...}|string SEADGroupPrefixes which is a table of Prefixes of the SA Groups in the DCS mission editor on which evasive actions need to be taken.
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-- @return SEAD
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-- @usage
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-- -- CCCP SEAD Defenses
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-- -- Defends the Russian SA installations from SEAD attacks.
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-- SEAD_RU_SAM_Defenses = SEAD:New( { 'RU SA-6 Kub', 'RU SA-6 Defenses', 'RU MI-26 Troops', 'RU Attack Gori' } )
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function SEAD:New( SEADGroupPrefixes )
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local self = BASE:Inherit( self, BASE:New() )
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self:F( SEADGroupPrefixes )
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if type( SEADGroupPrefixes ) == 'table' then
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for SEADGroupPrefixID, SEADGroupPrefix in pairs( SEADGroupPrefixes ) do
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self.SEADGroupPrefixes[SEADGroupPrefix] = SEADGroupPrefix
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end
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else
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self.SEADGroupPrefixes[SEADGroupPrefixes] = SEADGroupPrefixes
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end
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self:HandleEvent( EVENTS.Shot )
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self:I("*** SEAD - Started Version 0.2.7")
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return self
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end
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--- Update the active SEAD Set
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-- @param #SEAD self
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-- @param #table SEADGroupPrefixes The prefixes to add, note: can also be a single #string
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-- @return #SEAD self
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function SEAD:UpdateSet( SEADGroupPrefixes )
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self:F( SEADGroupPrefixes )
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if type( SEADGroupPrefixes ) == 'table' then
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for SEADGroupPrefixID, SEADGroupPrefix in pairs( SEADGroupPrefixes ) do
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self.SEADGroupPrefixes[SEADGroupPrefix] = SEADGroupPrefix
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end
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else
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self.SEADGroupPrefixes[SEADGroupPrefixes] = SEADGroupPrefixes
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end
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return self
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end
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--- Sets the engagement range of the SAMs. Defaults to 75% to make it more deadly. Feature Request #1355
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-- @param #SEAD self
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-- @param #number range Set the engagement range in percent, e.g. 50
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-- @return self
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function SEAD:SetEngagementRange(range)
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self:F( { range } )
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range = range or 75
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if range < 0 or range > 100 then
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range = 75
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end
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self.EngagementRange = range
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self:T(string.format("*** SEAD - Engagement range set to %s",range))
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return self
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end
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--- Check if a known HARM was fired
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-- @param #SEAD self
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-- @param #string WeaponName
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-- @return #boolean Returns true for a match
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function SEAD:_CheckHarms(WeaponName)
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self:F( { WeaponName } )
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local hit = false
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for _,_name in pairs (SEAD.Harms) do
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if string.find(WeaponName,_name,1) then hit = true end
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end
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return hit
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end
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--- Detects if an SAM site was shot with an anti radiation missile. In this case, take evasive actions based on the skill level set within the ME.
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-- @see SEAD
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-- @param #SEAD
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-- @param Core.Event#EVENTDATA EventData
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function SEAD:OnEventShot( EventData )
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self:T( { EventData } )
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local SEADUnit = EventData.IniDCSUnit
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local SEADUnitName = EventData.IniDCSUnitName
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local SEADWeapon = EventData.Weapon -- Identify the weapon fired
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local SEADWeaponName = EventData.WeaponName -- return weapon type
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self:T( "*** SEAD - Missile Launched = " .. SEADWeaponName)
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self:T({ SEADWeapon })
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--[[check for SEAD missiles
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if SEADWeaponName == "weapons.missiles.X_58" --Kh-58U anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.Kh25MP_PRGS1VP" --Kh-25MP anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.X_25MP" --Kh-25MPU anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.X_28" --Kh-28 anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.X_31P" --Kh-31P anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.AGM_45A" --AGM-45A anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.AGM_45" --AGM-45B anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.AGM_88" --AGM-88C anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.AGM_122" --AGM-122 Sidearm anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.LD-10" --LD-10 anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.ALARM" --ALARM anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.AGM_84E" --AGM84 anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.AGM_84A" --AGM84 anti-radiation missiles fired
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or
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SEADWeaponName == "weapons.missiles.AGM_84H" --AGM84 anti-radiation missiles fired
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--]]
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if self:_CheckHarms(SEADWeaponName) then
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local _targetskill = "Random"
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local _targetMimgroupName = "none"
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local _evade = math.random (1,100) -- random number for chance of evading action
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local _targetMim = EventData.Weapon:getTarget() -- Identify target
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local _targetUnit = UNIT:Find(_targetMim) -- Unit name by DCS Object
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if _targetUnit and _targetUnit:IsAlive() then
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local _targetMimgroup = _targetUnit:GetGroup()
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local _targetMimgroupName = _targetMimgroup:GetName() -- group name
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--local _targetskill = _DATABASE.Templates.Units[_targetUnit].Template.skill
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self:T( self.SEADGroupPrefixes )
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self:T( _targetMimgroupName )
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end
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-- see if we are shot at
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local SEADGroupFound = false
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for SEADGroupPrefixID, SEADGroupPrefix in pairs( self.SEADGroupPrefixes ) do
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if string.find( _targetMimgroupName, SEADGroupPrefix, 1, true ) then
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SEADGroupFound = true
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self:T( '*** SEAD - Group Found' )
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break
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end
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end
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if SEADGroupFound == true then -- yes we are being attacked
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if _targetskill == "Random" then -- when skill is random, choose a skill
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local Skills = { "Average", "Good", "High", "Excellent" }
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_targetskill = Skills[ math.random(1,4) ]
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end
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self:T( _targetskill )
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if self.TargetSkill[_targetskill] then
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if (_evade > self.TargetSkill[_targetskill].Evade) then
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self:T( string.format("*** SEAD - Evading, target skill " ..string.format(_targetskill)) )
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local _targetMimgroup = Unit.getGroup(Weapon.getTarget(SEADWeapon))
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local _targetMimcont= _targetMimgroup:getController()
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routines.groupRandomDistSelf(_targetMimgroup,300,'Diamond',250,20) -- move randomly
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--tracker ID table to switch groups off and on again
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local id = {
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groupName = _targetMimgroup,
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ctrl = _targetMimcont
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}
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local function SuppressionEnd(id) --switch group back on
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local range = self.EngagementRange -- Feature Request #1355
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self:T(string.format("*** SEAD - Engagement Range is %d", range))
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id.ctrl:setOption(AI.Option.Ground.id.ALARM_STATE,AI.Option.Ground.val.ALARM_STATE.RED)
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--id.groupName:enableEmission(true)
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id.ctrl:setOption(AI.Option.Ground.id.AC_ENGAGEMENT_RANGE_RESTRICTION,range) --Feature Request #1355
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self.SuppressedGroups[id.groupName] = nil --delete group id from table when done
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end
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-- randomize switch-on time
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local delay = math.random(self.TargetSkill[_targetskill].DelayOn[1], self.TargetSkill[_targetskill].DelayOn[2])
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local SuppressionEndTime = timer.getTime() + delay
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--create entry
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if self.SuppressedGroups[id.groupName] == nil then --no timer entry for this group yet
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self.SuppressedGroups[id.groupName] = {
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SuppressionEndTime = delay
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}
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Controller.setOption(_targetMimcont, AI.Option.Ground.id.ALARM_STATE,AI.Option.Ground.val.ALARM_STATE.GREEN)
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--_targetMimgroup:enableEmission(false)
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timer.scheduleFunction(SuppressionEnd, id, SuppressionEndTime) --Schedule the SuppressionEnd() function
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end
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end
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end
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end
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end
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end
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