Camera offset jittering

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1

I want to make a custom-made camera, but I have an issue. I apply an offset, a Vector3 to the subject position (the HumanoidRootPart). And it doesn’t really follow the camera’s look direction, so I converted it to the camera CFrame’s vector world space using:

Camera.CFrame:VectorToWorldSpace(Offset)

Now, It did work quite well, but I have a major issue that this solution causes: jittering and delays (lag behinds). As seen in the gif below:


So far, I did try applying the mouse’s delta (with deltaTime) to the converted offset and the camera’s CFrame, but that didn’t seem to work aswell.

This is my camera’s update code:

local function GetCameraAngles(Camera: Camera, Horizontal: number, Vertical: number): (number, number)
	local Delta = UserInputService:GetMouseDelta() * UserGameSettings.MouseSensitivity * Constants.SensitivityMultiplier

	Horizontal -= Delta.X / Camera.ViewportSize.X
	Vertical -= Delta.Y / Camera.ViewportSize.Y
	Vertical = math.rad(math.clamp(math.deg(Vertical), Constants.VerticalLimit.Min, Constants.VerticalLimit.Max))

	return Horizontal, Vertical
end

local function CalculateOffset(Camera: Camera): Vector3
	local InitialOffset = Global.CameraOffset
	local Delta = UserInputService:GetMouseDelta()
	
	Delta *= math.min(ECS.useDeltaTime(), 0.1) * 0.5 -- ECS.useDeltaTime() returns the deltaTime, i made sure of it.
	InitialOffset = (CFrame.Angles(0, -Delta.X, 0) * Camera.CFrame * CFrame.Angles(-Delta.Y, 0, 0)):VectorToWorldSpace(InitialOffset)

	return InitialOffset
end

local function Calculate(RootPart: BasePart, Camera: Camera, HorizontalAngle: number, VerticalAngle: number): CFrame
	local HorizontalRotation = CFrame.Angles(0, HorizontalAngle, 0)
	local VerticalRotation = CFrame.Angles(VerticalAngle, 0, 0)
	local Offset = CalculateOffset(Camera)
	
	return CFrame.new(RootPart.Position) * (HorizontalRotation * VerticalRotation)
end
2

To reproduce your problem and just to be sure, you are using BindToRenderStepped?

What I can see from the GIF is that it’s sort of moving a little too fast at certain moments, you might expect camera systems to move at the same speed (assuming constant framerate or delta time) or interpolate smoothly (lerp/TweenService) but I don’t see that this is the case here. This could help you diagnose and debug better.

1 Like
3

I’m running this in a RenderStepped.

4

Have you tried to use the tweenservice to get a smoother result?

5

I did try lerping the values, but it doesn’t fix the issue.

6

I’m struggling to understand why you aren’t just using the simple roblox camera movement…

7

More custom handling of the camera system.