How make laser b

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#1

image

Im trying to recreate this, but I have 0 clue where to start, any help with getting started?

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#2
#3

So basically your going to need to raycast a set amount of studs in the direction of the player’s humanoidrootpart, after that the ray returns something called the surface normal which is a vector that is orthogonal to the surface it hit

image
image1200Ă—1532 42.8 KB

We can use the normal and the position of the ray to rotate lets say a part directly flat against whatever our raycast hit

For some reason constantly setting the cframe made it very glitchy but I just crate the part and duplicate it, and also you can replicate this pretty easy by just rayasting from the camera

local plr = game.Players.LocalPlayer
local char = plr.Character
local root = char:WaitForChild("HumanoidRootPart")
local bruh = game.ReplicatedStorage.bruh
while true do
	local result = workspace:Raycast(root.Position,root.CFrame.LookVector * 5)
	if result then
		local attachment = Instance.new("Attachment")
		attachment.Visible = true
		attachment.WorldCFrame = result.Instance.CFrame:ToObjectSpace(CFrame.new(result.Position,result.Position + result.Normal)) * CFrame.Angles(0,math.rad(90),0)
		attachment.Parent = result.Instance
		local y = bruh:Clone()
		y.Parent = workspace
		y.CFrame = attachment.WorldCFrame
		wait(.005)
		y:Destroy()
	end
	game:GetService("RunService").Heartbeat:Wait()
end

Did some changes and it works with the camera

local plr = game.Players.LocalPlayer
local camera = workspace.CurrentCamera
local char = plr.Character
local root = char:WaitForChild("HumanoidRootPart")
local bruh = game.ReplicatedStorage.bruh
while true do
	local result = workspace:Raycast(camera.CFrame.Position,camera.CFrame.LookVector * 10)
	if result then
		local attachment = Instance.new("Attachment")
		attachment.WorldCFrame = result.Instance.CFrame:ToObjectSpace(CFrame.new(result.Position,result.Position + result.Normal)) * CFrame.Angles(0,math.rad(90),0)
		attachment.Parent = result.Instance
		local y = bruh:Clone()
		y.Parent = workspace
		y.CFrame = attachment.WorldCFrame
		wait(.005)
		y:Destroy()
	end
	game:GetService("RunService").Heartbeat:Wait()
end

Also I might add this is probably horrible for performance

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#4

It’s very simple, all you need is raycasting, and then when the raycast result is not equal to nil, clone a sphere and position it to the raycastResult.Position. Here is a good raycasting tutorial:

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#5

hello ive tried creating a beam as what you wanted:

here the video:

here the Script:

local Part = workspace.laser --the laser part :flush:

local attach1 = Part.Beam.Attachment1
local attach0 = Part.Beam.Attachment0
local run = game:GetService("RunService")
-- Build a "RaycastParams" so that it ignores the beamPoint
local Beampoint = game.ReplicatedStorage.Beampoint:Clone()
Beampoint.Parent = workspace
local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
raycastParams.FilterDescendantsInstances = {Beampoint} --ignores it
raycastParams.IgnoreWater = true
run.RenderStepped:Connect(function()
	local part = Part
	local origin = part.Position
	local direction = part.CFrame.LookVector*500 --the look vector of the part
    local result = workspace:Raycast(origin, direction,raycastParams)
	if result then
		Beampoint.Transparency = 0 --if there is a result we show the point
		attach1.WorldPosition = result.Position
		
		Beampoint.CFrame = CFrame.lookAt(result.Position, result.Position + result.Normal) * CFrame.Angles(0,math.rad(90),0) -- we time by angle 90 because its a cylinder
		BeamCircle.Position = result.Position + result.Normal
	else
		    Beampoint.Transparency = 1  --we wont show the point if there is no result
			attach1.WorldPosition = Part.CFrame.LookVector * 4000
		end

end)
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#6

What is the “attachment” classname? could you just send me a place file?

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#7

Yea sure here is the file:

Laser.rbxl (24.6 KB)

the Attachment is actually for the beam/laser effect

#8

Tweaked it a little bit and i got this now, I appreciate it a lot!
https://i.gyazo.com/536e46c6fd65a946b5367cf3dcbdad8d.mp4

#9

Slight problem though, I tried to make it work for the server, and now the beam point is goings crazy on the player?

wait(1)

local Part = workspace.laser

local attach1 = Part.Beam.Attachment1

local attach0 = Part.Beam.Attachment0

local run = game:GetService("RunService")

-- Build a "RaycastParams" object and cast the ray

local Beampoint = game.ReplicatedStorage.Beampoint:Clone()

Beampoint.Parent = workspace

local raycastParams = RaycastParams.new()

raycastParams.FilterType = Enum.RaycastFilterType.Blacklist

raycastParams.FilterDescendantsInstances = {Beampoint}

raycastParams.IgnoreWater = true

run.Heartbeat:Connect(function(step)

local part = Part

local origin = part.Position

local direction = part.CFrame.LookVector*500

local result = workspace:Raycast(origin, direction,raycastParams)

if result then

Beampoint.Transparency = 0

attach1.WorldPosition = result.Position

Beampoint.CFrame = CFrame.lookAt(result.Position, result.Position + result.Normal) * CFrame.Angles(0,math.rad(90),0)

--BeamCircle.Position = result.Position + result.Normal

else

Beampoint.Transparency = 1

attach1.WorldPosition = Part.CFrame.LookVector * 4000

end

end)
#10

my bad i forgot to anchor the Beam point and set its can collide to false. now its working perfectly fine on the server

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