Weapon On Back FiveM

weapon-on-back.lua

local WEAPONS <const> = {
    [`weapon_bat`] = `w_me_bat`,
    [`weapon_petrolcan`] = `prop_ld_jerrycan_01`,
    [`weapon_hazardcan`] = `prop_ld_jerrycan_01`,
    [`weapon_carbinerifle`] = `w_ar_carbinerifle`,
    [`weapon_carbinerifle_mk2`] = `w_ar_carbineriflemk2`,
    [`weapon_assaultrifle`] = `w_ar_assaultrifle`,
    [`weapon_assaultrifle_mk2`] = `w_ar_specialcarbine`,
    [`weapon_bullpuprifle`] = `w_ar_bullpuprifle`,
    [`weapon_bullpuprifle_mk2`] = `w_ar_bullpupriflemk2`,
    [`weapon_advancedrifle`] = `w_ar_advancedrifle`,
    [`weapon_microsmg`] = `w_sb_microsmg`,
    [`weapon_assaultsmg`] = `w_sb_assaultsmg`,
    [`weapon_smg`] = `w_sb_smg`,
    [`weapon_smg_mk2`] = `w_sb_smgmk2`,
    [`weapon_gusenberg`] = `w_sb_gusenberg`,
    [`weapon_sniperrifle`] = `w_sr_sniperrifle`,
    [`weapon_assaultshotgun`] = `w_sg_assaultshotgun`,
    [`weapon_bullpupshotgun`] = `w_sg_bullpupshotgun`,
    [`weapon_pumpshotgun`] = `w_sg_pumpshotgun`,
    [`weapon_pumpshotgun_mk2`] = `w_sg_pumpshotgunmk2`,
    [`weapon_musket`] = `w_ar_musket`,
    [`weapon_heavyshotgun`] = `w_sg_heavyshotgun`,
    [`weapon_firework`] = `w_lr_firework`,
}

local BONE_SETTING <const> = {
    back = 24816,
    coord = vec3(0.075, -0.15, -0.02),
    rot = vec3(0.0, 165.0, 0.0)
}

local attached_weapons = {}


local function IsMeleeWeapon(hash)
    return hash == `weapon_golfclub` or hash == `weapon_bat` or hash == `weapon_petrolcan` or hash == `weapon_hazardcan`
end

local function AttachWeapon(weaponhash, weaponmodel, boneNumber, coord, rot, isMelee)
    local ped = PlayerPedId()
    local bone = GetPedBoneIndex(ped, boneNumber)
    local timeout = GetGameTimer()
    RequestModel(weaponmodel)
    
    while not HasModelLoaded(weaponmodel) and GetGameTimer() - timeout < 10000 do
        Wait(15)
    end

    if HasModelLoaded(weaponmodel) then
        attached_weapons[weaponhash] = {
            handle = CreateObject(weaponmodel, GetEntityCoords(PlayerPedId()), true, false, true)
        }

        if isMelee then
            coord = vec3(0.11, -0.14, 0.0)
            rot = vec3(-75.0, 185.0, 92.0)
        end

        if weaponmodel == `prop_ld_jerrycan_01` then
            coord = vec3(coord.x + 0.3, coord.y, coord.z)
        end
        AttachEntityToEntity(attached_weapons[weaponhash].handle, PlayerPedId(), bone, coord, rot, 1, 1, 0, 0, 2, 1)
    end
end


Citizen.CreateThread(function()
    while true do
        local ped = PlayerPedId()
        for w, wm in pairs(WEAPONS) do
            if HasPedGotWeapon(ped, w, false) then
                if not attached_weapons[w] and GetSelectedPedWeapon(ped) ~= w then
                    AttachWeapon(w, wm, BONE_SETTING.back, BONE_SETTING.coord, BONE_SETTING.rot, IsMeleeWeapon(w))
                else
                    if attached_weapons[w] and GetSelectedPedWeapon(ped) == w then
                        print("deleted")
                        DetachEntity(attached_weapons[w].handle, true, false)
                        DeleteObject(attached_weapons[w].handle)
                        attached_weapons[w] = nil
                    end
                end
            end
        end
        Wait(100)
    end
end)