Help with getting arm to point to vector3

Help and Feedback Scripting Support
#1

im trying to get the players right arm to point towards their cursor position but i cant seem to figure out the CFrame maths to do so.
(i know i probably shouldnt use Mouse.Hit, i am only doing this for testing as i am trying to get it working before writing it properly)

what i have tried so far:

local jointPosition = Shoulder.Part0.CFrame:toWorldSpace(CFrame.new(0.9,0.25,0.25))
local cframe = CFrame.new(jointPosition.p, Mouse.Hit.Position) * CFrame.Angles(math.pi/2, 0, 0) * CFrame.new(0, -1, 0)

Shoulder.C0 = Shoulder.Part0.CFrame:ToObjectSpace(cframe)

local Transform: CFrame = Shoulder.Transform
Shoulder.Transform = Transform:Lerp(CFrame.lookAt(Shoulder.Part0.CFrame.Position,Mouse.Hit.Position).Rotation * CFrame.Angles(math.rad(90),0,0),.1)

Any help would realy be appreciated.

#2

I’m kind of confused but what is “shoulder” I’ve never seen a character part named that. Is this R6 or R15?

Edit: Also which arm? Right or left?

#3

yea could you send the entire script, im not sure if “shoulder” is a variable or if u made like an attatchment or idk, but i dont have enough reference to go off of with just this

#4

The Shoulder is just the Right Shoulder Motor6D that is inside of the players Torso.

#5

The Shoulder is just the Right Shoulder Motor6D that is inside of the players Torso.
also this is running in RunService.PreSimulation incase you wanted to know

#6

ohh i see what your trying to do then, so i think when you change the cframe of a part thats attatched by a motor6d then it destroys the motor6d, so instead try doing C0, instead of Part0 just try rq

and make sure not to do C0.Cframe because C0 is already a cframe value, so just change it to that

#7

I am already setting C0 or Transform, id rather use transform than C0 but if C0 is the only option i can use it.

#8
#9

idk if im doing something wrong but none of these worked 100%. here is the code that i tried which “worked” for someone but wont work for me:

local function Point_C0_To_Mouse(Motor6D, WorldCFrame)
	local Part1_CFrame = Motor6D.Part1.CFrame
	local Stored_C1 = Motor6D.C1
	local Stored_C0 = Motor6D.C0
	local RelativeTo_Part1 = Stored_C0 * Stored_C1:Inverse() * Part1_CFrame:Inverse() * WorldCFrame * Stored_C1
	RelativeTo_Part1 -= RelativeTo_Part1.Position

	local Goal_C0 = RelativeTo_Part1 + Stored_C0.Position
	return Goal_C0
end


game:GetService('RunService').Stepped:Connect(function()
	local RightArm = Player.Character['Right Arm']
	local LeftArm = Player.Character['Left Arm']
	local RightShoulder = Player.Character.Torso['Right Shoulder']
	local LeftShoulder = Player.Character.Torso['Left Shoulder']
	local Mouse_Pos = Mouse.Hit.Position
	RightShoulder.C0 = Point_C0_To_Mouse(RightShoulder, CFrame.lookAt(RightArm.Position, Mouse_Pos)) * CFrame.Angles(0,0, math.deg(-90))
	LeftShoulder.C0 = Point_C0_To_Mouse(LeftShoulder, CFrame.lookAt(LeftArm.Position, Mouse_Pos)) * CFrame.Angles(0,0, math.deg(90))
end)

i also tried writing it myself again but it didnt work either, here is my code:

game:GetService('RunService').Stepped:Connect(function()
	
	local Shoulder: Motor6D = Player.Character.Torso['Right Shoulder']
	local mouseDirection = Player.Character.HumanoidRootPart.CFrame:toObjectSpace(Mouse.Hit).LookVector
	local RightArm = Shoulder.Part1
	Shoulder.Transform = CFrame.new()
	
	local DefaultC0 = CFrame.new(1,.5,0)*CFrame.Angles(0,math.rad(90),0)
	local DefaultC1 = CFrame.new(-.5,.5,0)*CFrame.Angles(0,90,0)
	
	Shoulder.C0 = DefaultC0 * CFrame.lookAt((RightArm.CFrame*(DefaultC1):Inverse()).Position,Mouse.Hit.Position).Rotation * DefaultC1:Inverse()
end)