Laser gun beam problem

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#1

7875c1d75845b2def1c820e079d22942

I’ve made a laser gun that when fired, creates a beam to the mouse position. For whatever reason, when you shoot behind your character, the beam doesn’t destroy itself. I can’t figure out why, as there aren’t any errors being outputted.

Below is the function for casting the ray and all that.

function onActivated(plr, mouse)
	local params = RaycastParams.new()
	params.FilterType = Enum.RaycastFilterType.Blacklist
	params.FilterDescendantsInstances = ignoreList

	local origin = Instance.new("Part")
	origin.Size = Vector3.new(0.5,0.5,0.5)
	origin.Transparency = 1
	origin.Anchored = true
	origin.CanCollide = false
	origin.Position = mouse
	origin.Parent = workspace

	local a0, a1 = Instance.new("Attachment"), Instance.new("Attachment")
	a0.Parent = origin
	a1.Parent = hole

	local trail = Instance.new("Beam")
	trail.Width1 = 0.2
	trail.Width0 = 0.2
	trail.Segments = 0
	trail.FaceCamera = true
	trail.Attachment0 = a0
	trail.Attachment1 = a1
	trail.Parent = origin

	hole.laserLight.Enabled = true
	hole.laserSound.Pitch = math.random(90, 100)/100
	hole.laserSound:Play()
	
	local results = workspace:Raycast(hole.Position, (mouse - hole.Position).Unit * 999, params)

	if results then
		local hit = results.Instance
		
		if hit then
			if hit:IsDescendantOf(tool.Parent) then return end

			local human = hit.Parent:FindFirstChild("Humanoid")
			if human and human.Health > 0 then
				if debounce then 
					debounce = false

					tagHuman(human)
					hit.Parent.Humanoid:TakeDamage(8)

					wait(0.05)
					debounce = true
				end
			end
		end
	end

	wait(0.25)

	hole.laserLight.Enabled = false
	origin:Destroy()
	a1:Destroy()
end

Please let me know if you have any idea to why this is happening.

1 Like
#2

Heyo! The problem is you are checking if result is a descendant of the character then you terminate the operation not allowing it to go down to :Destroy(). Instead of having to do that detection just use Raycast Perms Blacklist. I hope this works! RaycastParams | Roblox Creator Documentation

1 Like
#3

The problem is you are checking if result is a descendant of the character then you terminate the operation not allowing it to go down to :Destroy(). Instead of having to do that detection just use Raycast Perms Blacklist.

I thought so. I already have a blacklist, but I did that because I don’t want the laser beams to be damage the player. Though, I see now that I don’t have to do that.

local ignoreList = {tool, tool.Parent}

I should already have the player’s character in the ignoreList table, though there’s a possibility that the tool.Parent that it’s reading off of is the player’s Backpack object. Any idea on how I could prevent this?

#4

I’m pretty sure this problem won’t happen as long as this function is called whilst the tool is equipped.

#5

Well…

fa24707c0bb28d69deec2433bbb502f6

#6

What are you defining tool as? (Ignore check second reply)

#7

Actually scratch what I just said, move where your defining ignore list into the activated function.

#8

I figured it out, thank you for helping!

1 Like
#9 
if hit:IsDescendantOf(tool.Parent) then
	hole.laserLight.Enabled = false
	origin:Destroy()
	a1:Destroy()
end