How to script a boss in LUA

Fist off, i suggest that you draw up a list of what you want your boss to do and all of the spells he will use. I also suggest that you sit down and write exactly how you want the fight to start off.

Now lets get to some code:

We need to start off by giving the boss some basic combat events:

Code:

---

--[[ Zaxis.lua  Author: Insomnicide]]--



--Zaxis Script AI--

function Zaxis_OnCombat(pUnit, Event)
end

function Zaxis_OnLeaveCombat(pUnit, Event)
    pUnit:RemoveEvents()   
end

function Zaxis_OnDied(pUnit, Event)
end

function Zaxis_OnKilledTarget (pUnit, Event)
end

---

Next, we will give him some spells to use as script functions. Notice how i named my functions with 1 word names. you can name your functions any way you want as long as you copy them EXACTLY in the next few steps.

Code:

---


function Zaxis_OnCombat(pUnit, Event)
end

function Volley(pUnit, Event)
    pUnit:FullCastSpellOnTarget(45031, pUnit:GetRandomPlayer(0))
end

function Flash(pUnit, Event)
    local stomptarget=pUnit:GetMainTank();
    pUnit:FullCastSpellOnTarget(46442, stomptarget)   
end

function Nova(pUnit, Event)
    pUnit:CastSpellOnTarget(30852, pUnit:GetRandomPlayer(0))   
end

function Drain(pUnit, Event)
    pUnit:CastSpellOnTarget(46466, pUnit:GetRandomPlayer(0))   
end

function Beam(pUnit, Event)
    pUnit:CastSpellOnTarget(40759, pUnit:GetRandomPlayer(0))   
end

function Negative(pUnit, Event)
    pUnit:CastSpellOnTarget(46285, pUnit:GetRandomPlayer(0))   
end

function Zaxis_OnLeaveCombat(pUnit, Event)
    pUnit:RemoveEvents()   
end

function Zaxis_OnKilledTarget (pUnit, Event)
end

function Zaxis_OnDied(pUnit, Event)
end

---

Now, lets register all of our functions the our OnCombat events. in the parenthesis you want the name of the function in quotes, how often it will occur in milliseconds, and how many times it will happen (0 is infinite)

Code:

---

function Zaxis_OnCombat(pUnit, Event)
pUnit:RegisterEvent("Combat_Talk", 30000, 0)
    pUnit:RegisterEvent("Nova", 45000, 0)
    pUnit:RegisterEvent("Flash", 25000, 0)
    pUnit:RegisterEvent("Volley", 27000, 0)
    pUnit:RegisterEvent("Drain", 15000, 0)
    pUnit:RegisterEvent("Beam", 30000, 0)
    pUnit:RegisterEvent("Negative", 32000, 0)
end

function Volley(pUnit, Event)
    pUnit:FullCastSpellOnTarget(45031, pUnit:GetRandomPlayer(0))
end

function Flash(pUnit, Event)
    local stomptarget=pUnit:GetMainTank();
    pUnit:FullCastSpellOnTarget(46442, stomptarget)   
end

function Nova(pUnit, Event)
    pUnit:CastSpellOnTarget(30852, pUnit:GetRandomPlayer(0))   
end

function Drain(pUnit, Event)
    pUnit:CastSpellOnTarget(46466, pUnit:GetRandomPlayer(0))   
end

function Beam(pUnit, Event)
    pUnit:CastSpellOnTarget(40759, pUnit:GetRandomPlayer(0))   
end

function Negative(pUnit, Event)
    pUnit:CastSpellOnTarget(46285, pUnit:GetRandomPlayer(0))   
end

function Zaxis_OnLeaveCombat(pUnit, Event)
    pUnit:RemoveEvents()   
end

function Zaxis_OnKilledTarget (pUnit, Event)
end

function Zaxis_OnDied(pUnit, Event)
end

---

Now, lets do the last thing to make the script complete. Lets register the Unit combat events to the DB.

Code:

---

function Zaxis_OnCombat(pUnit, Event)
pUnit:RegisterEvent("Combat_Talk", 30000, 0)
    pUnit:RegisterEvent("Nova", 45000, 0)
    pUnit:RegisterEvent("Flash", 25000, 0)
    pUnit:RegisterEvent("Volley", 27000, 0)
    pUnit:RegisterEvent("Drain", 15000, 0)
    pUnit:RegisterEvent("Beam", 30000, 0)
    pUnit:RegisterEvent("Negative", 32000, 0)
end

function Volley(pUnit, Event)
    pUnit:FullCastSpellOnTarget(45031, pUnit:GetRandomPlayer(0))
end

function Flash(pUnit, Event)
    local stomptarget=pUnit:GetMainTank();
    pUnit:FullCastSpellOnTarget(46442, stomptarget)   
end

function Nova(pUnit, Event)
    pUnit:CastSpellOnTarget(30852, pUnit:GetRandomPlayer(0))   
end

function Drain(pUnit, Event)
    pUnit:CastSpellOnTarget(46466, pUnit:GetRandomPlayer(0))   
end

function Beam(pUnit, Event)
    pUnit:CastSpellOnTarget(40759, pUnit:GetRandomPlayer(0))   
end

function Negative(pUnit, Event)
    pUnit:CastSpellOnTarget(46285, pUnit:GetRandomPlayer(0))   
end

function Zaxis_OnLeaveCombat(pUnit, Event)
    pUnit:RemoveEvents()   
end

function Zaxis_OnKilledTarget (pUnit, Event)
end

function Zaxis_OnDied(pUnit, Event)


RegisterUnitEvent(UnitID, 1, "Zaxis_OnCombat")
RegisterUnitEvent(UnitID, 2, "Zaxis_OnLeaveCombat")
RegisterUnitEvent(UnitID, 3, "Zaxis_OnKilledTarget")
RegisterUnitEvent(UnitID, 4, "Zaxis_OnDied")

---

Now, i will put my full shadow based boss script in here. My final product has a few more bells and whistles on it that i might create a guide on later on. My final script is in a different order, but it doesnt matter:

Code:

---

--[[ Zaxis.lua  Author: Insomnicide]]--



--Zaxis Script AI--

function Zaxis_OnCombat(pUnit, Event)
    pUnit:SendChatMessage(14, 0, "Your Lives have recently expired.")
    pUnit:RegisterEvent("Combat_Talk", 30000, 0)
    pUnit:RegisterEvent("Nova", 45000, 0)
    pUnit:RegisterEvent("Flash", 25000, 0)
    pUnit:RegisterEvent("Volley", 27000, 0)
        pUnit:RegisterEvent("Drain", 15000, 0)
        pUnit:RegisterEvent("Beam", 30000, 0)
        pUnit:RegisterEvent("Negative", 32000, 0)
end

function Zaxis_OnLeaveCombat(pUnit, Event)
    pUnit:RemoveEvents()   
end

function Zaxis_OnKilledTarget (pUnit, Event)
    local Choice=math.random(1, 3)
        if Choice==1 then
            pUnit:SendChatMessage(14, 0, "Perish, insect!")
            pUnit:PlaySoundToSet(12464)
        elseif Choice==2 then
            pUnit:SendChatMessage(14, 0, "You are finished!")
        elseif Choice==3 then
            pUnit:SendChatMessage(14, 0, "Too easy!")
            pUnit:PlaySoundToSet(12466)
end
end

function Zaxis_OnDied(pUnit, Event)
    pUnit:SendChatMessage(14, 0, "Gah! This is not possible!")
    pUnit:PlaySoundToSet(11706)
    pUnit:RemoveEvents()   
end


function Volley(pUnit, Event)
    pUnit:FullCastSpellOnTarget(45031, pUnit:GetRandomPlayer(0))
end

function Flash(pUnit, Event)
    local stomptarget=pUnit:GetMainTank();
    pUnit:FullCastSpellOnTarget(46442, stomptarget)   
end

function Nova(pUnit, Event)
    pUnit:CastSpellOnTarget(30852, pUnit:GetRandomPlayer(0))   
end

function Drain(pUnit, Event)
    pUnit:CastSpellOnTarget(46466, pUnit:GetRandomPlayer(0))   
end

function Beam(pUnit, Event)
    pUnit:CastSpellOnTarget(40759, pUnit:GetRandomPlayer(0))   
end

function Negative(pUnit, Event)
    pUnit:CastSpellOnTarget(46285, pUnit:GetRandomPlayer(0))   
end


function Combat_Talk(pUnit, Event)
    local Choice=math.random(1, 3)
        if Choice==1 then
            pUnit:SendChatMessage(14, 0, "You cannot surive my wrath!")
        elseif Choice==2 then
            pUnit:SendChatMessage(14, 0, "You shall burn in eternity!")
        elseif Choice==3 then
            pUnit:SendChatMessage(14, 0, "I live for this!")
end   
end

RegisterUnitEvent(UnitID, 1, "Zaxis_OnCombat")
RegisterUnitEvent(UnitID, 2, "Zaxis_OnLeaveCombat")
RegisterUnitEvent(UnitID, 3, "Zaxis_OnKilledTarget")
RegisterUnitEvent(UnitID, 4, "Zaxis_OnDied")

---

Simple, Basic and Good Guide.

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thank you very much =P