Attempt to index nil with 'Position'

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#1

Hello. I was trying to make a system where it would send a raycast from your camera, to your mouse. However, I keep getting this error, and I don’t know what is wrong.

attempt to index nil with 'Position'

Here is the localscript:

local player = game:GetService("Players").LocalPlayer
local mouse = player:GetMouse()
local camera = workspace.CurrentCamera

local function spawnDummy()
	local camPos = camera.CFrame.Position
	local mousePos = mouse.Hit.Position
	local raycast = workspace:Raycast(camPos,mousePos)
	print(raycast.Position)
	local dummy = game:GetService("ReplicatedStorage"):WaitForChild("Rig"):Clone()
	dummy.HumanoidRootPart.Position = raycast.Position
	dummy.Parent = workspace
end

mouse.Button1Down:Connect(spawnDummy)

Thanks for the help!

#2

What line is the “attempt to index nil with 'Position” error on?

#3

It is the line with the print command.

#4

WorldRoot:Raycast() returns nil if the Raycast didn’t hit anything

#5

Oh my god I can’t believe I didn’t see the raycast function, yea it’ll return nil if it didn’t hit something.

So make sure you do

if raycast then
--- Rest of the code here
end
#6

Yeah, but the raycast does not hit anything still.

#7

if you want to get the position where the mouse hits to place a dummy there you can just use mouse.Hit

#8

That’s what I originally did, but for what I’m doing, it has to be a raycast.

1 Like
#9

Multiply the mouse hit by 1000, the direction is too short so it is returning nil.

#10

Good idea, but it still didn’t work.

#11

use this

local function VisualizeRaycast(origin, direction)
	local midpoint = origin + direction*0.5;
	
	local part = Instance.new("Part");
	part.Anchored = true;
	part.CanCollide = false;
	part.Name = "DebugPart";
	
	part.CFrame = CFrame.lookAt(midpoint, origin);
	part.Size = Vector3.new(0.1, 0.1, direction.Magnitude);
	
	part.Material = Enum.Material.Neon;
	part.BrickColor = BrickColor.Red();
	
	part.Parent = workspace.Exclude;
end;

go from the origin to the mousehitposition(direction) * 1000

#12

Also make sure part.Parent is workspace instead of workspace.Exclude. This was a function for debugging my raycasts.

#13

i use this function in my game, idk if its what your looking for

local GetMouse3DPosition = function()
	local unitRay = Camera:ScreenPointToRay(Mouse.X, Mouse.Y)
	local raycastResult = workspace:Raycast(unitRay.Origin, unitRay.Direction * 10000)
	if raycastResult then
		return raycastResult.Position
	else
		return nil
	end
end
2 Likes
#14

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