Animation Blending Causes Spasms

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#1

Pretty much what the topic name suggests.

I have a sprint animation that im trying to blend with a walking animation, but while transitioning limbs occasionally spasm in random directions for no apparent reason.
It’s really obvious when you spam sprint too.

The walk animation has core priority and was set to the walk animation in the default animate script, whilst the sprint animation is set to idle priority.

The portion of my movement script that controls the sprint weight is also below but I don’t think it has any issues.

Any insights from anyone? Or is roblox just in desperate need of updating animations?

btw I have my own animation loader which is why the methods for AdjustSpeed() and AdjustWeight() are actually SetSpeed() and SetWeight()

function lerp(a, b, t)
	return a + (b - a) * t
end

function MovementTick(dt: number) -- OnRenderStepped
	if not HumanoidRootPart then
		return
	end
	
	if not Humanoid then
		return
	end
	
	local MoveDirection = Humanoid.MoveDirection
	local FloorMaterial = Humanoid.FloorMaterial
	local Acceleration = PlayerStats:GetStat("Acceleration")*.3
	local CanSprint = PlayerStats:GetState("CanSprint")
	
	if MoveDirection.Magnitude > .1 and FloorMaterial ~= Enum.Material.Air then
		WalkingAcceleration = math.clamp(lerp(WalkingAcceleration, 1-SprintingAcceleration, 1/Acceleration * dt), 0.01, 1)
	else
		WalkingAcceleration = math.clamp(lerp(WalkingAcceleration, 0, (1/Acceleration) * dt)-SprintingAcceleration, 0.01, 1)
	end

	if IsSprinting and MoveDirection.Magnitude > .1 and FloorMaterial ~= Enum.Material.Air and CanSprint then
		SprintingAcceleration = math.clamp(lerp(SprintingAcceleration, 1, 1/Acceleration * dt), 0.01, 1)
	else
		SprintingAcceleration = math.clamp(lerp(SprintingAcceleration, 0, (1/Acceleration) * dt), 0.01, 1)
	end

	local Velocity = HumanoidRootPart.AssemblyLinearVelocity
	local Walkspeed = PlayerStats:GetStat("Speed")
	local SprintSpeed = PlayerStats:GetStat("SprintSpeed")
	FootstepObj:SetSpeed((MoveDirection.Magnitude - SprintingAcceleration) + (SprintingAcceleration * 1.2))
	Humanoid.WalkSpeed = Walkspeed + (SprintSpeed * SprintingAcceleration)
	
	if SprintAnim.AnimationTrack.IsPlaying then
		print(`Sprint Anim Weight: {SprintingAcceleration}`)
		SprintAnim:SetWeight(SprintingAcceleration)
	end
end

local SprintBegan = BasicBind:ListenToInputBegan(PlayerKeybinds:GetBind("Sprint")):Connect(function ()
	IsSprinting = true
end)

local SprintEnded = BasicBind:ListenToInputEnded(PlayerKeybinds:GetBind("Sprint")):Connect(function ()
	IsSprinting = false
end)

function OnRun(PlayerSpeed: number) --On Humanoid.Running
	local Walkspeed = PlayerStats:GetStat("Speed")
	local SprintSpeed = PlayerStats:GetStat("SprintSpeed")
	
	if PlayerSpeed > 0.01 then
		local SprintAnimSpeed = (PlayerSpeed/(Walkspeed+SprintSpeed)) - .2
		
		if not SprintAnim.AnimationTrack.IsPlaying then
			SprintAnim:Play(.2, SprintingAcceleration, SprintAnimSpeed)
			return
		end
		
		SprintAnim:SetSpeed(SprintAnimSpeed)
		return
	end
	
	SprintAnim:Stop(.1)
end