How to add jumping to a slide script

[NoobInAFishTank]

so i made a slide script like sliding on the floor when u press q and it works but i tried to make it so that while ur sliding and u jump u boost forward and jump higher, and that works too but i want it to boost me forward in the direction im looking, how do i do that:

local UIS = game:GetService("UserInputService")
local char = script.Parent

local slideAnim = Instance.new("Animation")
slideAnim.AnimationId = "rbxassetid://106945307699338" -- Enter your AnimtionID

local keybind = Enum.KeyCode.Q -- between the key for ability
local canslide = true
local jumpthing = false

UIS.InputBegan:Connect(function(input,gameprocessed)
	if gameprocessed then return end
	if jumpthing == true then
		if input.KeyCode == Enum.KeyCode.Space then
			local humanoid = char:WaitForChild("Humanoid")
			humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
			char.HumanoidRootPart.Velocity = char.HumanoidRootPart.Velocity + Vector3.new(0, 50, 250)
		end
	end
	
	if input.KeyCode == keybind and char:WaitForChild("Humanoid").HipHeight == 2 and canslide then
		canslide = false
		jumpthing = true
		
		local playAnim = char.Humanoid:LoadAnimation(slideAnim)
		playAnim.Priority = Enum.AnimationPriority.Action -- Set priority to Action
		playAnim:Play()
		
		local slide = Instance.new("BodyVelocity")
		slide.MaxForce = Vector3.new(1,0,1) * 30000
		char.Humanoid.HipHeight = 1
		slide.Velocity = char.HumanoidRootPart.CFrame.lookVector * 100
		slide.Parent = char.HumanoidRootPart
		
		for count = 1, 8 do
			wait(0.1)
			slide.Velocity*= 0.7
		end
		playAnim:Stop()
		slide:Destroy()
		char.Humanoid.HipHeight = 2
		jumpthing = false
		
		task.wait(3)
		canslide = true
	end
end)

[Hzodx]

Instead of this

@NoobInAFishTank

char.HumanoidRootPart.Velocity + Vector3.new(0, 50, 250)

you should add char.HumanoidRootPart.CFrame.lookVector and multiply it