Voltaism Dev Tips

WIP

Serverside Tips

Restart self using an exported function

Package 1:

function RestartPackage(package_name)
    Delay(1, function()
        StopPackage(package_name)
    end)
    Delay(1000, function()
	    StartPackage(package_name)
    end)
    return true
end
AddFunctionExport("RestartPackage", RestartPackage)

Package 2:

local package1 = ImportPackage("package1")
package1.RestartPackage(GetPackageName())

Clientside Tips

Disable a remote player/npc collisions properly

local npc_actor = GetNPCActor(npc)
local Capsule = npc_actor:GetComponentsByClass(UCapsuleComponent.Class())[1] -- Get capsule component of the npc actor
Capsule:SetCollisionResponseToChannel(ECollisionChannel.ECC_Pawn, ECollisionResponse.ECR_Ignore) -- Disable Capsule collision with players
Capsule:SetCollisionResponseToChannel(ECollisionChannel.ECC_Camera, ECollisionResponse.ECR_Ignore) -- Disable capsule collision with camera
Capsule:SetCollisionResponseToChannel(ECollisionChannel.ECC_GameTraceChannel1, ECollisionResponse.ECR_Ignore) -- Disable capsule collision with bullets
for i, v in ipairs(npc_actor:GetComponents()) do
    if v:GetClassName() == "USkeletalMeshComponent" then
        v:SetCollisionResponseToChannel(ECollisionChannel.ECC_GameTraceChannel1, ECollisionResponse.ECR_Ignore) -- Disable skeletal mesh component collision with bullets
    end
end

Change vehicle velocity

local veh = GetPlayerVehicle(GetPlayerId())
if (veh ~= 0 and IsValidVehicle(veh) and GetVehicleDriver(veh) == GetPlayerId()) then -- The player has to be the driver or the vehicle won't be synced
    local vehsk = GetVehicleSkeletalMeshComponent(veh)
    vehsk:SetPhysicsAngularVelocityInDegrees(FVector(vax, vay, vaz), bAddToCurrent)
    vehsk:SetPhysicsLinearVelocity(FVector(vx, vy, vz), bAddToCurrent)
end

Change walking animations / skeleton

You'll need unreal engine installed in order to do this, it's experimental and it breaks SetPlayerAnimation. First make a new plugin, create an animation blueprint then make your own state machines... and link it to the output pose.

local SKComp = GetNPCSkeletalMeshComponent(npc, "Body") -- for an npc but you can do it with a player
local SKMesh = SKComp:GetSkeletalMesh()
SKMesh:SetPostProcessAnimBlueprint(UClass.LoadFromAsset("/vzombies/Zombie/Zombie_Anim_BP"))
SKComp:InitAnim(false)

function GetZombiePostProcessInstance(npc) -- Get the post process animation instance
    local SKComp = GetNPCSkeletalMeshComponent(npc, "Body")
    return SKComp:GetPostProcessInstance()
end

local PP = GetZombiePostProcessInstance(npc)
PP:ProcessEvent("SetAttacking", true) -- You can call animation blueprint functions

Enter a vehicle when the player press F, even while being far from the door

AddEvent("OnKeyPress", function(key)
    if (key == "F" and GetPlayerVehicle(GetPlayerId()) == 0) then
        local veh = GetStreamedVehicles()[1]
        if (veh and GetVehicleDriver(veh) == 0) then
            local plyactor = GetPlayerActor()
            local x, y, z = GetVehicleDoorLocation(veh, 1)
            plyactor:SetActorLocation(FVector(x, y, z + 50)) -- Teleport the player at the vehicle door
        end
    end
end)

Global/Other Tips

Call/Edit a function/variable with a string

_ENV["function_" .. "test"] = function(nb)
   print("Hi", nb)
end
function_test(0)
_ENV["function_test"](1)

_ENV["vartest"] = 1
print(vartest)
print(_ENV["vartest"])

Add rotations

function AddRotation(r, r2)
    r = r + r2
    if r > 180 then
       r = -180 + (r - 180)
    elseif r < -180 then
       r = 180 + (r + 180)
    end
    return r
end
local rx, ry, rz = AddRotation(120, 70), AddRotation(-160, -40), AddRotation(60, 90)