Help with Raycasting

Help and Feedback Scripting Support
#1

I need help with Raycasting. I have a script that is supposed to raycast and stop exactly at whatever part your mouse is on, and create a beam between the character and the object, like ODM gear from Attack on Titan, but this ends up happening:

image
image985×605 86.8 KB

While my mouse is aiming and it should raycast to the wall, it raycasts on some weird offset on my screen. and sometimes at certain angles it does go where I want it to, but in the second picture you can see it doesnt stop at the wall, and goes straight through it:
image
Heres the script:

local UserInputService = game:GetService("UserInputService")

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local camera = workspace.CurrentCamera
local params = RaycastParams.new()
params.FilterType = Enum.RaycastFilterType.Blacklist
params.FilterDescendantsInstances = {}

local function rayResult()
	local mouseUnitRay = mouse.UnitRay
	return workspace:Raycast(mouseUnitRay.Origin, mouseUnitRay.Direction * 300, params)
end

local startRay = false
local currentRay = {}

UserInputService.InputBegan:Connect(function(key, isGameInput)
	if isGameInput then return end
	if key.KeyCode == Enum.KeyCode.E then
		if not startRay then
			print("StartRay")
			startRay = true
			local mousePos = mouse.Origin
			local r = rayResult()
			print(r)
			local att1 = Instance.new("Attachment")
			att1.Position = r.Position
			att1.Parent = r.Instance
			local beam = Instance.new("Beam")
			beam.Attachment0 = game.Players.LocalPlayer.Character.ODM.Root.MidPoint
			beam.Attachment1 = att1
			beam.Color = ColorSequence.new({
				ColorSequenceKeypoint.new(0, Color3.fromRGB(0,0,0)),
				ColorSequenceKeypoint.new(1, Color3.fromRGB(0,0,0))
			})
			beam.Transparency = NumberSequence.new({
				NumberSequenceKeypoint.new(0, 0),
				NumberSequenceKeypoint.new(1, 0)
			})
			beam.Width0 = 0.1
			beam.Width1 = 0.1
			beam.Parent = beam.Attachment0
			
			currentRay.Beam = beam
			currentRay.Att0 = beam.Attachment0
			currentRay.Att1 = beam.Attachment1
		end
	end
end)

UserInputService.InputEnded:Connect(function(key, isGameInput)
	if isGameInput then return end
	if startRay then
		startRay = false
		
		currentRay.Beam:Destroy()
		currentRay.Att1:Destroy()
		currentRay.Beam = nil
		currentRay.Att0 = nil
		currentRay.Att1 = nil
	end
end)

I’ve never worked with Rays much before, so I’m probably doing something wrong. I tried to find topics on this on the devforum but I couldn’t really find any good information. Appreciate any help.

1 Like
#2

You should use mouse.Hit.Position as it will give you a Vector3 World Position of wherever the mouse is pointing at.

(Hit is a CFrame actually)

#3

Just replace that with mouseUnitRat.Origin?

#4

The raycasting seems fine, it’s the Attachments that are the problem as the position are relative to the attachment parent.

See below image and example script within a part:

local r = script.Parent

local att1 = Instance.new("Attachment")
att1.Position = r.Position
att1.Parent = r

image
image1204×505 131 KB

–It’s world position is equal to

attachment.WorldPosition = part.CFrame * attachment.Position -- How attachments work

Consider doing this instead:

local r = script.Parent

local att1 = Instance.new("Attachment")
att1.Parent = r
att1.WorldPosition = r.Position

image
image1134×402 107 KB

#5

Sorry but that doesn’t seem to fix anything
It still seems to have a weird offset from the mouse and the beam just goes straight through parts

#6

Actually this did fix it going through parts, but now the problem is the raycast has an offset from my mouse and shoots weird EDIT: NVM FIXED