How to use RemoteFunctions?
Here's my scenario: each player has 500 health and 500 "shield" which is essentially extra health. I've assigned shield to an IntValue inside a GUI and I want shield to be depleted before health. I created a RemoteFunction for defining damage to players and I also have a brick that is supposed to damage players when touched.
Here is the LocalScript (inserted inside a ScreenGUI):
--Remote functions
local damageInfantry = game.ReplicatedStorage.DamageInfantry
function damageInfantry.OnClientInvoke(player, humanoid, amount)
if shield.Value > 0 then
shield.Value = shield.Value - amount
if shield.Value < 0 then --More damage done than shield remaining
local difference = shield.Value * (-1)
humanoid:TakeDamage(difference)
end
else
humanoid:TakeDamage(amount)
end
end
Here is the server script (inserted inside the brick):
--Functions
function onTouch(part)
local character = part.Parent
local humanoid = character:FindFirstChild("Humanoid")
if humanoid then
if canDamage then
damageInfantry:InvokeClient(humanoid, 100)
canDamage = false
wait(1)
canDamage = true
end
end
end
This gives me an error: attempt to perform arithmetic on local 'amount' (a nil value) What am I doing wrong and is there a better way to handle damaging humanoids with this "shield" mechanic?
Thanks in advance.
2 answers
This is because you added a player parameter. Pointed out by climethestair. Now, on InvokeClient, that is where you need a player argument.
damageInfantry:InvokeClient(player, blah your parameters go here)
You’ll have to find the player by using Players.PlayerAdded, ClickDetector.MouseClick, etc. This is the client we are invoking the RemoteFunction to.
Although not a parameter in OnClientInvoke, it is required and the first argument to be passed to InvokeClient.
Use Players.LocalPlayer to get the player from LocalScripts. Any event that passes the Player as a parameter (e.g. Dialog.DialogChoiceSelected), is server side only. If you passed the player on OnClientInvoke, your InvokeClient would have to look like this:
damageInfantry:InvokeClient(player, player, blah other parameters here)
You’d have to add an extra player parameter.
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function damageInfantry.OnClientInvoke(player, humanoid, amount)
You have an extra argument here, it should only be humanoid, amount. Usually, the event only takes the player argument when it's from client to server so that the server knows who sent it.
function damageInfantry.OnClientInvoke(humanoid, amount)
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