Make character's arm point toward mouse regardless of character rotation

Help and Feedback Scripting Support
#1

I’ve never been that well with CFrames and need a little help.
I’m trying to make the player’s right arm point toward the mouse, but when the character turns around 180 degrees, it appears to function as if the character wasn’t rotated 180 degrees.

IT’s something to do with world and object space, but I’m unsure of how to resolve this issue.

https://gyazo.com/c5f415b3749bc818470008d6c4aed119
When the player rotates is the problem, as it is pointing behind not in front. It’s not taking the current rotation of the character into consideration. How can I make it work for all rotations of my character?

Current code:

local Players = game:GetService(“Players”)

local plr = Players.LocalPlayer
local char = plr.Character
local mouse = plr:GetMouse()

local armOffset = char.UpperTorso.CFrame:Inverse() * char.RightUpperArm.CFrame

local armWeld = Instance.new(“Weld”)
armWeld.Part0 = char.UpperTorso
armWeld.Part1 = char.RightUpperArm
armWeld.Parent = char

mouse.Move:Connect(function()
local x,y,z = CFrame.new(char.RightUpperArm.Position,mouse.Hit.Position):ToEulerAnglesXYZ()
armWeld.C0 = armOffset * CFrame.fromEulerAnglesXYZ(x,y,z) * CFrame.fromEulerAnglesXYZ(math.rad(90),0,0)
end)

15 Likes
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#2

I tinkered with your code a bit and managed to get it working. Here is what I did:

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")

local plr = Players.LocalPlayer
local char = plr.Character
local mouse = plr:GetMouse()

local armOffset = char.UpperTorso.CFrame:Inverse() * char.RightUpperArm.CFrame

local armWeld = Instance.new("Weld")
armWeld.Part0 = char.UpperTorso
armWeld.Part1 = char.RightUpperArm
armWeld.Parent = char

RunService.Heartbeat:Connect(function()
	local cframe = CFrame.new(char.UpperTorso.Position, mouse.Hit.Position) * CFrame.Angles(math.pi/2, 0, 0)
	armWeld.C0 = armOffset * char.UpperTorso.CFrame:toObjectSpace(cframe)
end)
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#4

what script is it and where do you put it? @systemac

1 Like
#5

script type : Local Script
put it at StarterCharacterScripts in StarterPlayer
@GamingExpert0312

1 Like
#7

thanks helped with my game im trying to make roblox with very cool controls

2 Likes
#8

Well I made it for R6 as well

local Camera = workspace.CurrentCamera
local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()

local char = Player.Character or Player.CharacterAdded:Wait()
local Root = char:WaitForChild("HumanoidRootPart")
local RunService = game:GetService("RunService")

local CN,CA = CFrame.new,CFrame.Angles
local an = math.asin

local armOffset = char.Torso.CFrame:Inverse() * char["Right Arm"].CFrame


local armWeld = Instance.new("Weld")
armWeld.Part0 = char.Torso
armWeld.Part1 = char["Right Arm"]
armWeld.Parent = char

RunService.Heartbeat:Connect(function()
	local cframe = CN(char.Torso.Position, Mouse.Hit.Position) * CA(math.pi/2, 0, 0)
	armWeld.C0 = armOffset * char.Torso.CFrame:toObjectSpace(cframe) * CN(0,0,-0.5)
end)
13 Likes
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#9

how can i make it replicate to the server? i tried but the arm is teleporting

1 Like
#10

now thats a trillion dollar question that I dunno

#11

Hello, Do you have a way so you can put a tool in that hand.

1 Like
#12

Using tweenservice, you can tween your arm to the “mouse position” while being constantly updated via remoteEvent and you can use magnitude so that way it doesn’t always render or run for other players while out of a certain distance.

#13

try to look up with this script lol, it’s kinda broken.

(i mean look up in 1st person)

#14

yea thats just how roblox does.

#15

use remote event. Send the arm.C0 to server so the server can set that to the arm on server

#16

Sorry for bumping this topic but could you give me an example on how to do it? I’ve been struggling for a few hours to get it done

#17

sure what rig do you use?R6 or 15?

1 Like
#18

I use R15, and thank you very much

#19

Also, if you don’t mind, after getting the server replication fixed, I have a problem with the arm pointing, it kind of bugs when aiming at the ground (while using shift lock), I might make a post when I get the chance to record it

#20

But, won’t that clog up the bandwidth?
Edit: oops, didn’t notice the date… :sweat:. Sorry for this “necro”-posting.

1 Like
#21

it unfortunately does . However , you can use unreliable remote event and fire at every 0.1 seconds

#22

Can’t you use already existing Motor6Ds (Right Shoulder, Left Shoulder) to restrain the use of remotes? I’m pretty sure they replicate.