Preventing visual & other problems with high / low fps

[HeadAdminKen]

Currently with how my system is now, it can cause unintended issues in behavior, things being genuinely faster, visuals being too quick to see or moves ending in a flash or the exact opposite if they have say 5fps. I’ve tried using Heartbeat, but to no avail, I know you can get it to make this stuff work identical to what it’d be with 60fps though. Ideas/Help is appreciated.

function swait(n) --Local script, used for abilities and such
	if not n then game:GetService("RunService").RenderStepped:wait() else local t = time()
		repeat game:GetService("RunService").RenderStepped:wait() until time()-t >= n/60
	end
end

---

local function swait(n) --Used in module for *numerous* visual effects
	for i = 1, (n or 1) do 
	game:GetService("RunService").RenderStepped:wait()
	end
	end

[uvic1rn (Sarah)]

The proper solution is to base your animations around time that has actually passed.

With the introduction of the Maximum Framerate setting, this is even more important:

Introducing the Maximum Framerate setting

Hello Creators, We know that many of you use an external tool to run Roblox at their display’s native refresh rate by removing the client 60Hz frame render lock. That’s why today, we are excited to introduce PC support for modern displays that support refresh rates above 60Hz without any external downloads required! [image] [image] Players can change the maximum framerate on the app through a newly introduced game setting. PC players that can achieve those higher framerates will get a smo…

Luckily, they have generously provided examples of what and what not to do:

@Dogekidd2012

As an example:

-- BAD CODE!

local RunService = game:GetService("RunService")

RunService.PostSimulation:Connect(function()
    script.Parent.CFrame *= CFrame.Angles(0, math.rad(1), 0)
end)

This script inside a part will rotate it by 1 degree every frame. At 60Hz, this will rotate the part by 60 degrees a second, but it will rotate slower on weaker devices, and faster both for players that increase their local maximum framerate, or for those on VR.

If your intent is 60 degrees per second, then this code should instead be:

local RunService = game:GetService("RunService")

local DEGREES_PER_SECOND = 60

-- delta is the number of seconds since the last PostSimulation call
RunService.PostSimulation:Connect(function(delta)
    script.Parent.CFrame *= CFrame.Angles(0, math.rad(DEGREES_PER_SECOND) * delta, 0)
end)

We are thrilled to finally get this in your hands! Please let us know if you have any questions.

It looks like your code is currently doing the first thing, where you’re waiting for a fixed amount of time to pass and then updating the position based on that fixed amount of time.
Instead of:

while true do
  swait()
  newValue += 1/60
end

You should do:

NUMS_PER_SECOND = 60
while true do
  timeElapsedSecs = time.wait()
  newValue += timeElapsedSecs * NUMS_PER_SECOND
end