How do I make Motor6D joint look at Vector3 position?

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#1

Hello, I am trying to make Motor6D joint look at Part's position which is Vector3.

Simple rotation such as the one below works like a charm.

turretMotor.C0 *=  CFrame.Angles(0, math.rad(90), 0)

However, I need to make it look at a Vector3 position. So I tried the following:

local target = script.Parent.Target
local motor = script.Parent.Tank.Base.Motor
local turretCF = motor.C0

while true do
	-- Dont crash Roblox
	task.wait()
	
	-- C0 is in a object space so we should convert target position to object space as well?
	local targetCF = target.CFrame:ToObjectSpace(turretCF)
	motor.C0 = CFrame.lookAt(turretCF.Position, targetCF.Position) -- Update the C0
end

Structure

image

Video

As you can see it doesn’t work. I would like to know why it doesn’t work and how to fix the issue. Thanks!

#2

if the turret will stay there and not be moved then you can just anchor it and remove the motor6d. then you can do this:

motor = CFrame.new(turretCF.Position, targetCF.Position)
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#3

I understand, I know that, however, I am using Motor6D since I want it to work with moving assembly.

#4

do you mean that their going to move around?

#5

what is part1 and part0 of the motor6d

#6

image

#7

this should work

local target = script.Parent.Target
local motor = script.Parent.Tank.Base.Motor
local turretCF = motor.C0
local turret = script.Parent.Tank.Turret

while true do
	-- Dont crash Roblox
	task.wait()
	
	-- C0 is in a object space so we should convert target position to object space as well?
	motor.Part1 = nil
	turret.CFrame = CFrame.new(turret.Position, target.Position)
	motor.Part1 = turret
end
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#8

Now it does nothing, regardless of where I move the “target” part.

#9

are there any errors? is the game even running?

#10

There are no errors, and the game is indeed running.

#11

try chinging this:

	motor.Part1 = nil
	turret.CFrame = CFrame.new(turret.Position, target.Position)
	motor.Part1 = turret

to this:

	motor.Part0 = nil
	turret.CFrame = CFrame.new(turret.Position, target.Position)
	motor.Part0 = motor.Parent
#12

Now the turret is detached from the base. I don’t think that messing with Part0 and Part1 properties you will achieve anything not “hacky”.

#13

yeah i guess your right lemme try finding soemthing else

#14

Here my other attempts:

local function lookAt(base: CFrame, target: CFrame)
	return (base - base.Position):Inverse() * CFrame.new(Vector3.zero) * CFrame.Angles(math.pi / 2, 0, 0)
end

local function lookAt2(root: Part, origin: CFrame, target: CFrame)
	local direction = (Vector3.new(target.Position.X, origin.Position.Y, target.Position.Z) - origin.Position).Unit
	return CFrame.Angles(3 * math.pi/2, 0, math.pi) * CFrame.Angles(0, 0, -math.asin(direction.X)) * CFrame.Angles(0, 0, math.rad(-root.Orientation.Y)) * CFrame.Angles(-math.asin(direction.Y), 0, 0)
end

Both didn’t work.

I got them from here:

#15

i think i found something that works

1 Like