Attempt to preform arithmetic (sub) on number and Vector3

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1

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local function Fire(barrelAttachment)
	local bar = barrelAttachment
	local pos = (bar.CFrame + bar.CFrame.LookVector * BULLET_MAXDIST).Position
	local inter = (barrelAttachment.WorldPosition - pos).Magnitude
	local dir
	local modifiedBulletSpeed
	local spread = inter - math.random(MIN_BULLET_SPREAD_ANGLE, MAX_BULLET_SPREAD_ANGLE)
	
	local wallOrigin = barrelAttachment.WorldPosition
-- error happens here --	local wallDirection = ((inter + spread) - wallOrigin).Unit * BULLET_MAXDIST -- error happens here, has nothing to do with unit * bullet_maxdist
	local wallRay = workspace:Raycast(wallOrigin, wallDirection, CastParams)

	if wallRay then
		local origin = barrelAttachment.Position
		local direction = (wallRay.Position - origin).Unit * (wallRay.Position - origin).Magnitude    

		dir = direction
		modifiedBulletSpeed = (dir * BULLET_SPEED)
	else
		local origin = barrelAttachment.Position
		local direction = (spread - origin).Unit * BULLET_MAXDIST

		dir = direction
	end

	local cast = Caster:Fire(barrelAttachment.WorldPosition, dir, modifiedBulletSpeed)
end
2

try vector3.new(inter) + vector3.new(spread)

3

same error

character limitttttt

4

can I have the whole script to try to debug it

5

why do you need it literally everything is right there

6

when I copy and paste the script some of the variables are unknown and and I need the variables

7 
for i,v in pairs(Handle:GetChildren()) do
			if v.Name ~= 'GunFirePoint' then continue end
Fire(v)

character limit

8

try vector3.new(inter + spread)

10

doesnt work

character limiteeee

12

swapped attachments for parts, worked awesomely.