Fastcast .rayhit event triggers multiple times based on how many previous shots were landed

[AIRBORNENicuYT (NickSneaky)]

Whenever .rayhit triggers, it adds by 1 from the previous shot and triggers based on it. The logs below demonstrates it. I’ve looked through these forums:

Fastcast hitting more times than it should

Hi, I am currently making a tower defense game. I decided to use FastCast to solve an issue with smooth projectiles, it worked for the most part, it just made this problem. The FastCast seems to hit more times than it should. output: 08:18:20.893 Hit - Server - 1:44 08:18:22.292 - Server - 1:25 08:18:22.342 Hit (x2) - Server - 1:44 08:18:23.809 - Server - 1:25 08:18:23.842 Hit (x3) - Server - 1:44 08:18:25.326 - Server - 1:25 08:18:25.392 Hit (x4) -…

FastCast spamming RayHit

So i have a FastCast artillery script that fires whenever a GUI button is pressed, as you can see in the video, when the artillery fires 8 times RayHit prints 24 times. This makes the missile explode alot of times and i have no idea what’s causing this. [image] FastCast Shoot script local FastCast = require(game.ServerStorage:WaitForChild("FastCastRedux")) local Vehicle = script.Parent.Parent local ScriptStuff = Vehicle.ScriptStuff local GUI = ScriptStuff.GUIValue.Value local Soun…

FastCast registers multiple hits on one cast before terminating

You can write your topic however you want, but you need to answer these questions: What do you want to achieve? Keep it simple and clear! I want to use FastCast for my gun What is the issue? Include screenshots / videos if possible! When the cast hits something, it sometimes registers multiple hits before terminating instead of just one. What solutions have you tried so far? Did you look for solutions on the Developer Hub? I have tried adding a debounce, but this has not worked. I am…

But none worked.
Also please excuse if I mess up something I’m new to the devforums.

local dbg = 0
 
local function onHit(cast, result : RaycastResult, velocity, tracer)
    dbg += 1
    print(dbg)
    
    local part = result.Instance
    local char = part:FindFirstAncestorWhichIsA("Model")
    local dontPenetrate = {
        Enum.Material.Concrete;
        Enum.Material.Cobblestone;
        Enum.Material.Metal;
        Enum.Material.Brick;
        Enum.Material.Basalt;
        Enum.Material.Pavement;
        Enum.Material.Rock;
        Enum.Material.CrackedLava;
        Enum.Material.DiamondPlate;
    }
 
    if result.Instance then
        local cosmetic
        if table.find(dontPenetrate, result.Material) then
            cosmetic = game.ReplicatedStorage.cosmetic.bullethole_small:Clone()
        else
            cosmetic = game.ReplicatedStorage.cosmetic.bullethole_big:Clone()
        end
        cosmetic.Parent = workspace.Debris
        cosmetic.CFrame = CFrame.new(result.Position, result.Position + result.Normal)
        local random = math.random(1, 2)
        if random == 1 then
            playSound(4427234167, cosmetic, .5)
        elseif random == 2 then
            playSound(4427232788, cosmetic, .5)
        end
        game.Debris:AddItem(cosmetic, 10)
    end
 
    if result.Material == Enum.Material.Glass then
        require(modules.GlassShattering):shatter(part, result.Position, result.Normal)
        tracer:Destroy()
    elseif table.find(dontPenetrate, result.Material) then
        tracer.CanCollide = true
        tracer.Trail.Enabled = false
        tracer.Anchored = false
        game.Debris:AddItem(tracer, 5)
    else
        tracer:Destroy()
    end
 
    if char and char:FindFirstChildWhichIsA("Humanoid") then
        if part.Name == "Head" then
            char.Humanoid:TakeDamage(require(plr.Character:FindFirstChildWhichIsA("Tool").gun).lethaldamage)
        else
            char.Humanoid:TakeDamage(require(plr.Character:FindFirstChildWhichIsA("Tool").gun).damage)
        end
    end
end
 
plr.CharacterAdded:connect(function()

plr.Character.ChildAdded:Connect(function(child)
		if bullet ~= nil then return end
		bullet = fastcast.new()
	end)
	
plr.Character.gunclient.events.setpose.OnServerInvoke = (function(eplr, gun, pose, arg, check)
        if pose == "fire" then
            if gun.gun.ammo.Value > 0 then
                local bulletbehavior = bullet.newBehavior()
                local params = RaycastParams.new()
                params.IgnoreWater = true
                params.FilterType = Enum.RaycastFilterType.Exclude
                params.FilterDescendantsInstances = {gun.Parent, workspace.Debris}
                bulletbehavior.RaycastParams = params
                bulletbehavior.MaxDistance = require(gun.gun).range
                bulletbehavior.Acceleration = Vector3.new(0, -workspace.Gravity/2, 0)
                bulletbehavior.CosmeticBulletTemplate = game.ReplicatedStorage.cosmetic.tracer
                bulletbehavior.CosmeticBulletContainer = workspace.Debris
 
                bullet:Fire(gun.Handle.muzzle.WorldPosition, (arg - gun.Handle.muzzle.WorldPosition).Unit, require(gun.gun).speed, bulletbehavior)
                gun.gun.ammo.Value -= 1
                
                --⸻⸻⸻⸻⸻⸻⸻⸻
            
                bullet.RayHit:Connect(onHit)
                bullet.LengthChanged:Connect(lengthChanged)
 
                playSound(require(gun.gun).firesound, gun.Handle, 1)
 
                gun.Handle.muzzle.fire:Emit()
                gun.Handle.muzzle.smoke:Emit(10)
            
                local shell = game.ReplicatedStorage.cosmetic.shell:Clone()
                shell.CanCollide = true
                shell.CollisionGroup = "CharactersCollide"
                shell.Parent = gun.Handle.eject
                
                shell.CFrame = gun.Handle.eject.WorldCFrame
                game.Debris:AddItem(shell, 3)
            end
        end
    end)
end)
end)```

13:43:08.562 FIRED - Server - Script:159
13:43:08.564 1 - Server - Script:29
13:43:09.816 FIRED - Server - Script:159
13:43:09.817 2 - Server - Script:29
13:43:09.818 3 - Server - Script:29
13:43:12.040 FIRED - Server - Script:159
13:43:12.042 4 - Server - Script:29
13:43:12.042 5 - Server - Script:29
13:43:12.042 6 - Server - Script:29

[NotTrulyEpic]

You are supposed to disconnect the event that registers hit (I believe it’s bullet.RayHit:Connect(onHit)) once you’re done with it.

[AIRBORNENicuYT (NickSneaky)]

It disconnects itself. That is what the docs say at least.
https://etithespir.it/FastCastAPIDocs/fastcast-objects/caster/#rbxscriptsignal-rayhitactivecast-raycastresult-vector3-instance

[dthecoolest]

@AIRBORNENicuYT

disconnects itself. That is what the docs say at least.

Not it does not. The docs say to connect to the events only once and not everytime it fires.

[AIRBORNENicuYT (NickSneaky)]

That doesn’t make sense. How would I detecte if the cast that fires at

 bullet:Fire(gun.Handle.muzzle.WorldPosition, (arg - gun.Handle.muzzle.WorldPosition).Unit, require(gun.gun).speed, bulletbehavior)

would hit something?

[dthecoolest]

You create the event once per object just like doing part.touched

plr.Character.ChildAdded:Connect(function(child)
		if bullet ~= nil then return end
		bullet = fastcast.new()

--put the rayhit connection here for this fastcast.
	end)

[AIRBORNENicuYT (NickSneaky)]

Thank you so much. Gosh I regret using fastcast sometimes.