Predicted TTT sprinting code (double tap W)

ttt_sprint.lua

local WAIT_TIME = 0.2 -- seconds between w presses
local SPEED_MULT = 2
local STAMINA_REGEN_PER_SECOND = 0.1
local STAMINA_LOSS_PER_SECOND  = 0.2

local sprinttime = function(ply, val)
    if (val ~= nil) then
        ply:SetNW2Float("SprintTime", val)
    end
    return ply:GetNW2Float("SprintTime", 0)
end
local sprintmode = function(ply, val)
    if (val ~= nil) then
        ply:SetNW2Bool("SprintMode", val)
    end
    return ply:GetNW2Bool("SprintMode", false)
end
local sprintstamina = function(ply, val)
    if (val ~= nil) then
        ply:SetNW2Float("SprintStaminaTime", CurTime())
        ply:SetNW2Float("SprintStaminaPercent", val)
    end
    local time = ply:GetNW2Float("SprintStaminaTime", -math.huge)
    local percent = ply:GetNW2Float("SprintStaminaPercent", 1)
    return math.Clamp(percent + (CurTime() - time) * (sprintmode(ply) and -STAMINA_LOSS_PER_SECOND or STAMINA_REGEN_PER_SECOND), 0, 1)
end

hook.Add("TTTPlayerSpeedModifier", "Sprinter", function(ply, slowed, mv)

    -- no need to override
    if (sprintstamina(ply) <= 0 or slowed or not mv:KeyDown(IN_FORWARD)) then
        -- reset if was running
        if (sprintmode(ply)) then
            sprintstamina(ply, sprintstamina(ply)) -- update time
            sprinttime(ply, 0)
            sprintmode(ply, false)
        end
        return
    end

    if (mv:KeyPressed(IN_FORWARD)) then
        if (sprinttime(ply) > CurTime() - WAIT_TIME) then
            sprintstamina(ply, sprintstamina(ply)) -- update time
            sprinttime(ply, 0)
            sprintmode(ply, true)
        else
            sprinttime(ply, CurTime())
        end
    end

    if (sprintmode(ply)) then
        return SPEED_MULT
    end

end)

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