Im trying to make weapon sway and walk bobble like games unite

Help and Feedback Scripting Support
#1

Hello developers! Im writing an fps framework and since I like Games Unite and its smooth and polished viewmodel movement, I decided to design my viewmodel movement just like theirs.

I have posted about this before and found an answer for the sway, but after adapting it to a spring module, some issues have appeared and Ive also realized that it doesnt look much like Games Unite.

I can share code if needed, but I mostly want something that looks like games unite and is really smooth.

https://gyazo.com/629d252fbe447110b2f45f3f8311d726

This is a video of their sway and bobble, but if this isnt enough, here is their game link :

Thanks for reading!

#2

I’m sure they used a module script for the spring effect which goes like this:

-- Constants
local ITERATIONS = 8

-- Module
local SPRING = {}

-- Functions 
function SPRING.create(mass, force, damping, speed)
	local spring = {}

	local self = setmetatable({}, spring)

	self.Target	= Vector3.new();
	self.Position = Vector3.new();
	self.Velocity = Vector3.new();

	self.Mass = mass or 5;
	self.Force = force or 50;
	self.Damping = damping or 4;
	self.Speed = speed  or 4;

	function spring.shove(force)
		local x, y, z = force.X, force.Y, force.Z
		if x ~= x or x == math.huge or x == -math.huge then
			x = 0
		end
		if y ~= y or y == math.huge or y == -math.huge then
			y = 0
		end
		if z ~= z or z == math.huge or z == -math.huge then
			z = 0
		end

		self.Velocity = self.Velocity + Vector3.new(x, y, z)
	end

	function spring.update(dt)
		local scaledDeltaTime = math.min(dt or 1/60, 1) * self.Speed / ITERATIONS

		for i = 1, ITERATIONS do
			local iterationForce = self.Target - self.Position
			local acceleration = (iterationForce * self.Force) / self.Mass

			acceleration = acceleration - self.Velocity * self.Damping

			self.Velocity = self.Velocity + acceleration * scaledDeltaTime
			self.Position = self.Position + self.Velocity * scaledDeltaTime
		end

		return self.Position
	end

	return spring
end

-- Return
return SPRING

The swaying mechanic is in a youtube video in the fps framework playlist by XERA dev, although I forgot the episode.

#3

Hey, I don’t know if you’re still working on this project, but I found out how to make the sway pivot around the handle, here it is.

local function GetOffsetFromHandle(Rotation : Vector3)
	local HandleOffset = Framework.Settings.ViewmodelPhysics.HandleOffset

	return -(CFrame.new(HandleOffset) * CFrame.Angles(Rotation.X, Rotation.Y, Rotation.Z) * CFrame.new(-HandleOffset)).Position
end

You just have to create a seperate spring for the position offset and get the offset by the springs updated position, although, I am not sure if it will work the same for your project.

1 Like
#5

I just wanted to clarify something. It’s not that I don’t understand why people are facing issues with the game, because I absolutely do. I’m aware of the challenges that are present, and I think it’s important to acknowledge them so we can work towards solutions together.