Dash goes way longer in air

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1

I’ve run into an issue with my game: the dash travels much further in the air than on the ground, and something seems to be pulling the player slightly backward.
I tried fixing it using LinearVelocity, but I must have done something wrong, as dashing in the air sometimes causes the player to fling a bit and fly off the ground.
Could someone help me do the correct way to fix this?

local function PerformDash(character, charData, dashType, dashDirection, state)
	local humanoid = character:FindFirstChildOfClass("Humanoid")
	local hrp = character:FindFirstChild("HumanoidRootPart")
	if not humanoid or not hrp then return end

	state.isDashing = true

	local dashConfig = {
		Speed = charData:Get({"Stats", dashType .. "Speed"}) or 75,
		Duration = charData:Get({"Stats", dashType .. "Duration"}) or 0.25,
		Smoothness = charData:Get({"Stats", dashType .. "Smoothness"}) or 75,
	}

	local duration = dashConfig.Duration
	local elapsed = 0

	local startSpeed = dashConfig.Speed
	local endSpeed = dashConfig.Speed * 0.85
	
	PlayDashAnimation(dashDirection)

	if state.currentBodyVelocity then
		state.currentBodyVelocity:Destroy()
	end

	local bodyVelocity = Instance.new("BodyVelocity")
	bodyVelocity.MaxForce = Vector3.new(40000, 0, 40000)
	bodyVelocity.P = 1250
	bodyVelocity.Parent = hrp

	state.currentBodyVelocity = bodyVelocity

	local initialDir
	if dashDirection == "Back" then
		initialDir = -hrp.CFrame.LookVector
	elseif dashDirection == "Right" then
		initialDir = hrp.CFrame.RightVector
	elseif dashDirection == "Left" then
		initialDir = -hrp.CFrame.RightVector
	end

	initialDir = Vector3.new(initialDir.X, 0, initialDir.Z)
	if initialDir.Magnitude > 0 then
		initialDir = initialDir.Unit
	end

	local currentDir = initialDir

	local connection
	connection = RunService.Heartbeat:Connect(function(dt)
		elapsed += dt

		if elapsed >= duration then
			connection:Disconnect()

			if bodyVelocity then
				bodyVelocity:Destroy()
				state.currentBodyVelocity = nil
			end

			task.delay(0.5, function()
				state.isDashing = false 
			end)

			return
		end

		local targetDir
		if dashDirection == "Back" then
			targetDir = -hrp.CFrame.LookVector
		elseif dashDirection == "Right" then
			targetDir = hrp.CFrame.RightVector
		elseif dashDirection == "Left" then
			targetDir = -hrp.CFrame.RightVector
		end

		targetDir = Vector3.new(targetDir.X, 0, targetDir.Z)

		if targetDir.Magnitude > 0 then
			targetDir = targetDir.Unit
		end

		currentDir = currentDir:Lerp(targetDir, math.clamp(dt * dashConfig.Smoothness, 0, 1))
		if currentDir.Magnitude > 0 then
			currentDir = currentDir.Unit
		end

		local progress = elapsed / duration
		local speedMultiplier = 1 - (progress ^ 2)
		local currentSpeed = endSpeed + (startSpeed - endSpeed) * speedMultiplier

		bodyVelocity.Velocity = currentDir * currentSpeed
	end)


	AddConnection(connection)
end
2

Friction is stopping you when on the ground

2 Likes
3

That doesn’t help all that much, the problem still remains

4

You could fix this by adding a very subtle upwards force to the body velocity to counteract the frictional force.

An alternative would be to reduce the bodyVelociy’s force if the players humanoid is in a HumanoidStateType is FallingDown, Flying, FreeFall, Ragdoll, or Jumping. However, this would be more tedious as if the player hits the ground mid dash the reduced force and friction would stack.

5

Easiest way to balance them is by slowing down airspeed

if humanoid.FloorMaterial == Enum.Material.Air then
    currentSpeed *= 0.75
end
6

Check out this thread for a very similar issue

7

Will this fix the issue where the player also gets pulled backwards slightly?

8

it’s called friction, intentional feature of the roblox engine

1 Like
10

how is this related to the fact that the player is literally also being pulled back?

11

BodyVelocity is deprecated; use VectorVelocity or LinearVelocity. Additionally, try using ApplyImpulse.

12

When destroying the BodyVelocity, set the HumanoidRootPart’s AssemblyLinearVelocity to Vector3.zero. This should cancel any monentum from the dash

bodyVelocity:Destroy()
hrp.AssemblyLinearVelocity = Vector3.zero
13

i solved this problem by reducing the max force, allowing the ground speed to reach its maximum without being limited by friction

1 Like
14

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