New project - questions about programming C++ & Lua

[Nowix93]

[TFS 1.3]
Hello OTpeople,
I start my ot projekt and i will have probably a lot of questions.
Ofc i will use before ask "search" but when it doesnt help i will ask in this topic
i learning form 2 month c++ for this and now i start with lua too, i know its nothing but step by step so
i start learnig TFS source how its work, there is a lot of everything ;x
ok, lets go to the firsts questions
1)

Spoiler: for example

COMBAT_PHYSICALDAMAGE = 1 << 0, COMBAT_ENERGYDAMAGE = 1 << 1, COMBAT_EARTHDAMAGE = 1 << 2, COMBAT_FIREDAMAGE = 1 << 3, COMBAT_UNDEFINEDDAMAGE = 1 << 4, COMBAT_LIFEDRAIN = 1 << 5, COMBAT_MANADRAIN = 1 << 6, COMBAT_HEALING = 1 << 7, COMBAT_DROWNDAMAGE = 1 << 8, COMBAT_ICEDAMAGE = 1 << 9, COMBAT_HOLYDAMAGE = 1 << 10, COMBAT_DEATHDAMAGE = 1 << 11,

in enums there are a lot of (example)1 << 11
that mean something? highter priority dmg In this case ? its probably not necessary but i'm curious ;x
2)
i want create simple spell with funcion (creature:getDirection) to check where the player is looking and set area dmg for that but i stuck , and i want to get 2 more options before cast, first dont atack just stay in 500ms i create for it CONDITION_CAST and second for cast animatin on me best option is the character was invisible first what functions should I use for this?
My simple ofc dont working spell

Spoiler: spell

-- Delay between animations.
local animationDelay = 200
local combat = {}

local north = 0
local east = 1
local south = 2
local west = 3

-- Frames (1 = Area, 2 = Player, 3 = Player + Self Damaging)
local area0 = {
    {
        {1, 0, 0},
        {0, 2, 0},
        {0, 0, 0}
    },
    {
        {0, 1, 0},
        {0, 2, 0},
        {0, 0, 0}
    },
    {
        {0, 0, 1},
        {0, 2, 0},
        {0, 0, 0}
    }
}

local area1 = {
    {
        {0, 0, 1},
        {0, 2, 0},
        {0, 0, 0}
    },
    {
        {0, 0, 0},
        {0, 2, 1},
        {0, 0, 0}
    },
    {
        {0, 0, 0},
        {0, 2, 0},
        {0, 0, 1}
    }
}

local area2 = {
    {
        {0, 0, 0},
        {0, 2, 0},
        {0, 0, 1}
    },
    {
        {0, 0, 0},
        {0, 2, 0},
        {0, 1, 0}
    },
    {
        {0, 0, 0},
        {0, 2, 0},
        {1, 0, 0}
    }
}

local area3 = {
    {
        {0, 0, 0},
        {0, 2, 0},
        {1, 0, 0}
    },
    {
        {0, 0, 0},
        {1, 2, 0},
        {0, 0, 0}
    },
    {
        {1, 0, 0},
        {0, 2, 0},
        {0, 0, 0}
    }
}
    local x
    local cDir = creature:getDirection()
    if     cDir == north then
    x = area0
   
    elseif cDir == east then
    x = area1
   
    elseif cDir == south then
    x = area2
   
    elseif cDir == west then
    x = area3
    end

    local area = x

for i = 1, #area do
    combat[i] = Combat()
    combat[i]:setParameter(COMBAT_PARAM_TYPE, COMBAT_FIREDAMAGE)
    combat[i]:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_FIREAREA)
end

for x, _ in ipairs(area) do
    combat[x]:setArea(createCombatArea(area[x]))
end

function executeCombat(p, i)
    if not p.player then
        return false
    end
    if not p.player:isPlayer() then
            return false
    end
    p.combat[i]:execute(p.player, p.var)
end

function onCastSpell(player, var)

    local p = {player = player, var = var, combat = combat}

    -- Damage formula
    local level = player:getLevel()
    local maglevel = player:getMagicLevel()
    local min = (level / 5) + (maglevel * 1.4) + 8
    local max = (level / 5) + (maglevel * 2.2) + 14

    for i = 1, #area do
        combat[i]:setFormula(COMBAT_FORMULA_LEVELMAGIC, 0, -min, 0, -max)
        if i == 1 then
            combat[i]:execute(player, var)
        else
            addEvent(executeCombat, (animationDelay * i) - animationDelay, p, i)
        end
    end

    return true
end

I will have many questions so I do not know if setting up a topic in good place if not please transfer

 

[Infernum]

For your first question, those are bit flags, the << operator (bitwise left shift) shifts the bit (1) N times to the left, you can learn more here: Understanding Bitwise Operators (https://code.tutsplus.com/articles/understanding-bitwise-operators--active-11301)
And i don't understand your 2nd question, try to rephrase what exactly you're asking help for.

 

[Nowix93]

@Delusion thx i read a little about bitwise shift but its to early for me to know how to use it.
so to the second question
i want this little wave(animation and dmg) be in the front from player, i mean when im turn north dmg is from above player
\/ this is first version before i try use more area


how to write this part

Spoiler: spell

local x
local cDir = creature:getDirection()
if cDir == north then
x = area0

elseif cDir == east then
x = area1

elseif cDir == south then
x = area2

elseif cDir == west then
x = area3
end

local area = x

but i have this in consol

data/spells/scripts/custom/qwe.lua
data/spells/scripts/custom/qwe.lua:83: attempt to index global 'creature' (a nil value)
stack traceback:
        [C]: in function '__index'
        data/spells/scripts/custom/qwe.lua:83: in main chunk
[Warning - Event::checkScript] Can not load script: scripts/custom/qwe.lua

and i have one more question about how use two effect on me i mean first is to get invisible for a second, getmagiceffect() is currect function?
and the same time when im disappeared i wanton on me one more effect (i mean any animation) for maybe one second.

 

[Nowix93]

someone know how to set up this direction?
i try many options like

local cDir = {
    [DIRECTION_NORTH] = area0,
    [DIRECTION_EAST] = area1,
    [DIRECTION_SOUTH] = area2,
    [DIRECTION_WEST] = area3
}

creature:getPosition():combat():setArea(cDir[creature:getDirection()])

in consol

data/spells/scripts/custom/qwe.lua:108: attempt to index global 'creature' (a nil value)
stack traceback:
        [C]: in function '__index'
        data/spells/scripts/custom/qwe.lua:108: in main chunk

and

local cDir = {
    [DIRECTION_NORTH] = combat:setArea(area0),
    [DIRECTION_EAST] = combat:setArea(area1),
    [DIRECTION_SOUTH] = combat:setArea(area2),
    [DIRECTION_WEST] = combat:setArea(area3)
}

local area = creature:getDirection()

consol

data/spells/scripts/custom/qwe.lua:102: attempt to call method 'setArea' (a nil value)
stack traceback:
        [C]: in function 'setArea'
        data/spells/scripts/custom/qwe.lua:102: in main chunk

else

Spoiler

for i = 1, #area0 do
    combat[i] = Combat()
    combat[i]:setParameter(COMBAT_PARAM_TYPE, COMBAT_FIREDAMAGE)
    combat[i]:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_FIREAREA)

for j = 1, #area1 do
    combat[j] = Combat()
    combat[j]:setParameter(COMBAT_PARAM_TYPE, COMBAT_FIREDAMAGE)
    combat[j]:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_FIREAREA)
for k = 1, #area2 do
    combat[k] = Combat()
    combat[k]:setParameter(COMBAT_PARAM_TYPE, COMBAT_FIREDAMAGE)
    combat[k]:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_FIREAREA)
for l = 1, #area3 do
    combat[l] = Combat()
    combat[l]:setParameter(COMBAT_PARAM_TYPE, COMBAT_FIREDAMAGE)
    combat[l]:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_FIREAREA)


   
    local cDir = {
    [DIRECTION_NORTH] = combat:setArea(area0),
    [DIRECTION_EAST] = combat:setArea(area1),
    [DIRECTION_SOUTH] = combat:setArea(area2),
    [DIRECTION_WEST] = combat:setArea(area3)
}
end
end
end
end
local area = creature:getDirection()
--creature:getPosition():combat:setArea(cDir[creature:getDirection()])

but still
Lua Script Error: [Test Interface]
data/spells/scripts/custom/qwe.lua
data/spells/scripts/custom/qwe.lua:122: attempt to call method 'setArea' (a nil value)

What i need to send in (combat) here [DIRECTION_NORTH] = combat:setArea(area0)
nothing work ;/

 

[Nowix93]

i understand some of my mistake and try a lot other option but nothing work.
i finish today with this part, it's probably closest think what i want

Spoiler: part of spell

local north = 0
    local east = 1
    local south = 2
    local west = 3
    --local creature = creature:getid()
   
    function gd()
   
    --local creature = player(cid)
    local creature = creature:getid()
    local cDir = creature:getDirection()
    local cPos = creature:getPosition ()
    local pos = (Position(0,0,0))
    if     cDir == north then
        if not getTileInfo(cPos).house and not getTilePzInfo(cPos) then
        for i, _ in ipairs(area0) do
            area[i] = area0[i]
        end  
        end
    elseif cDir == east then
        if not getTileInfo(cPos).house and not getTilePzInfo(cPos) then
            for i, _ in ipairs(area1) do
            area[i] = area1[i]
        end
        end
    elseif cDir == south then
        if not getTileInfo(cPos).house and not getTilePzInfo(cPos) then
            for i, _ in ipairs(area2) do
            area[i] = area2[i]
        end
        end
    elseif cDir == west then
        if not getTileInfo(cPos).house and not getTilePzInfo(cPos) then
        for i, _ in ipairs(area3) do
            area[i] = area3[i]
        end
        end
        end
        return area
        end
       
        local area = gd()

in consol attempt to index global 'creature' (a nil value)
so someone can tell me how i can get it?
i try many think and what you can see in code like (creature:getid()) but i dont know how this engine work ;x
what function can work well here?

 

[Nowix93]

solved at this moment
project stil open ofc

 

[Nowix93]

Hello everyone today i have two questions about ~my spell

Spoiler: spell

-- Delay between animations.
local animationDelay = 200
local stunDuration = 2000
local invANDcastDuration = 400
local combat = {}

-- cast
local     cast = Condition(CONDITION_CAST)
        cast:setParameter(CONDITION_PARAM_TICKS, invANDcastDuration)
        cast:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_NONE)

-- invisible
local     invisible = Condition(CONDITION_INVISIBLE)
        invisible:setParameter(CONDITION_PARAM_TICKS, invANDcastDuration)
        --invisible:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_MAGIC_BLUE)
        --invisible:setParameter(COMBAT_PARAM_AGGRESSIVE, false)

-- bleeding
local     bleeding = Condition(CONDITION_BLEEDING)
        bleeding:setParameter(CONDITION_PARAM_DELAYED, 5)
        bleeding:addDamage(5, 1000, 10)

-- stun
local     stun = Condition(CONDITION_STUN)
        stun:setParameter(CONDITION_PARAM_TICKS, stunDuration)
        stun:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_BUBBLES)


-- Frames (1 = Area, 2 = Player, 3 = Player + Self Damaging)
local area = {
     {
        {0, 0, 0},
        {0, 2, 0},
        {0, 0, 0}
    },
    {
        {0, 0, 0},
        {0, 3, 0},
        {0, 0, 0}
    }
}

function bleedmath(p, i)
math.randomseed(os.time())
local bleed = math.random(100)
--print(bleed)
    if bleed < 30 then
    p.combat[I]:addCondition(bleeding)
end
end

-- if Player then /2
function stuns(p)
   for y, _ in ipairs(area) do
        p.combat[y]:addCondition(stun)
        --local creature = p.combat[y]:getCreatures()
        --local pla = area[y]:getPosition()
        if     area[y]:isPlayer() then
            stunDuration = 10000    
        end
    end
end

for i = 1, #area do
    combat[I] = Combat()
    combat[I]:setParameter(COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
    combat[I]:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_HITAREA)
    --combat[I]:addCondition(stun)
end

for x, _ in ipairs(area) do
    combat[x]:setArea(createCombatArea(area[x]))
end

function executeCombat(p, i)
    if not p.player then
        return false
    end
    if not p.player:isPlayer() then
            return false
    end    
    p.combat[I]:execute(p.player, p.var)
end

function onCastSpell(player, var)

    
    local p = {player = player, var = var, combat = combat}    
    
    -- Damage formula
    local level = player:getLevel()
    local maglevel = player:getMagicLevel()
    local min = (level / 5) + (maglevel * 1.4) + 8
    local max = (level / 5) + (maglevel * 2.2) + 14
    
    doAddCondition(p.player, invisible)
    doAddCondition(p.player, cast)
    stuns(p)
    
    
    for i = 1, #area do
        combat[I]:setFormula(COMBAT_FORMULA_LEVELMAGIC, 0, -min, 0, -max)
        if i == 1 then
            combat[I]:execute(player, var)
        else
            --bleedmath(p, i)
            addEvent(executeCombat, (animationDelay * i) - animationDelay, p, i)
            end
    end

    return true
end

1) i have problem with hit position in area, when set like this

  {0, 1, 0}
  {0, 2, 0}
  {0, 0, 0}

so i want hit something in front of me but it's look like that

i dont know why ;x ofc i can just use 3 in here but it doesnt solve my problem.

2) i want check area in funcion stuns for chenging stun duration but all time i got
attempt to call method 'isPlayer' (a nil value)
i traied somthing like this

Spoiler: 1

function stuns(p)
    for i, _ in ipairs(area) do
        p.combat[i]:addCondition(stun)
        --local creature = p.combat[i]:getCreatures()
        local pla = p.combat[i]:getPosition()
        if     pla:isPlayer() then
            stunDuration = 10000   
        end
    end
end

Spoiler: 2

-- if Player then /2
function stuns(p)
    for y, _ in ipairs(area) do
        p.combat[y]:addCondition(stun)
        
        local pos = getSpectators(p.combat[y])
        local creature = pos:getCreatures()
        local pla = creature:getPosition()
        if     pla:isPlayer() then
            stunDuration = 10000    
        end
    end
end

and nothing work, can someone explain this?
i check other spells but they use there just creature:isPlayer() and it work, in my spell i traied too use just p.player:isPlayer() and i dont have errors but that dont change stun duration ;/

 

[Nowix93]

what I have to do to make this fragment work?
Can someone help me with it i tried everything but i dont to how to do it ;/

 -- if Player then /2
function stuns(p)
    for y, _ in ipairs(area) do
        p.combat[y]:addCondition(stun)        
        if     p.player:isPlayer() then
            stunDuration = 10000    
        end
    end
    end

 

[Nowix93]

up
another day next attempts but effect the same

function stuns(p)
        
        local playerPos = p.player:getPosition()
        local getTargets = Game.getSpectators(playerPos, false, false, 1, 1, 1, 1)
        
    for _,target in pairs(getTargets) do
            if not target:isNpc() then
                if     target:isPlayer() then
                    local stunDuration = 10000
                        target:addCondition(stun)
                        print(stunDuration, '1')
                else
                        target:addCondition(stun)
                end
                print(stunDuration, '2')
            end       
    end
end

What i doing wrong, tell me pls ;x