Argument 1 missing or nil

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#1

Not sure why this is erroring? Edit: Error on the line that says “Shoulder.Transform = Plane * CFrame.Angles(ShoulderAngle, 0, 0)”

local SolveIK = require(game.ReplicatedStorage.Modules.SolveIK)

	local Plane, ShoulderAngle, ElbowAngle = SolveIK(CFrame.new(), HandTarget, UpperArmLength, LowerArmLength)
	
	Shoulder.Transform = Plane * CFrame.Angles(ShoulderAngle, 0, 0)
	Elbow.Transform = CFrame.Angles(ElbowAngle, 0, 0)
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#2

Can you send a screenshot of the error

1 Like
#3

the title is the error that i am getting :DDD, on the line with shoulder.transform

1 Like
#4

What is SolveIK returning?

#5

solveik is set to local SolveIK = require(game.ReplicatedStorage.Modules.SolveIK)

#6

Cool. So what is that function returning?

#7

can you pls send the module script you called for this

#8

They return positions of where they are the module returns CFrame Plane, Radian Shoulder angle, Radian Elbow angle

#9

this the problem. your supposed to give x,y,z

#10

You’re using the values that are returned from your function call to compute new values, but the function is not returning anything for either Plane or ShoulderAngle.

#11

Module returns return planeCF, a1 + math.pi/2, a2 - a1

#12

Try printing ShoulderAngle, I think the error came from CFrame.Angles on the X place

#13

Here you go https://i.imgur.com/5fInrbD.png

#14

Is nil the printed shoulder angle?

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#15

Yup, that did happen until 3rd try really, or the end

#16

Then check if ShoulderAngle is nil like

local Plane, ShoulderAngle, ElbowAngle = SolveIK(CFrame.new(), HandTarget, UpperArmLength, LowerArmLength)
	
    ShoulderAngle = ShoulderAngle or 0
	Shoulder.Transform = Plane * CFrame.Angles(ShoulderAngle, 0, 0)
	Elbow.Transform = CFrame.Angles(ElbowAngle, 0, 0)
#17

Then it completely breaks, this is a hand moving system using controller

#18

Save the last ShoulderAngle, if its nil then set it to that?

#19

CFrame.new with no arguments creates a new CFrame with an identity matrix. That wouldn’t be the issue.

#21

That is actually the only operation you can do on CFrames. Add, subtract, and divide do not work, whereas multiply does.

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