-- A variable to store the animation's start time is needed if you -- want to use the "Lerp" function to make timed animations. local animation_start, animation_duration = CurTime(), 2 hook.Add( "HUDPaint", "LerpAnimation", function() local animation_progress = ( CurTime() - animation_start ) / animation_duration -- The "Lerp" function is then called using the fraction as the first argument with -- the second being the value you want to start at ("from") when the fraction is "0" and -- the third being the final value ("to") when the fraction is "1". -- If the "from" value is going to be "0" consider using the formula "to * animation_progress". -- If the "to" value is "0" you could use the formula "from * ( 1 - animation_progress )". -- These methods are slightly faster and will achieve the same result as if you were to use "Lerp". -- For example a different way of writing this line would be: -- "local animated_value = 255 * ( 1 - animated_progress )" -- If you wanted to reverse the animation the line could be: -- "local animated_value = Lerp( animation_progress, 0, 255 )" -- or -- "local animated_value = 255 * animation_progress" local animated_value = Lerp( animation_progress, 255, 0 ) -- In this case the "Lerp" function is being used to make a rect fade out. surface.SetDrawColor( 255, 255, 255, animated_value ) surface.DrawRect( 50, 50, 300, 300 ) -- If you add the start time and duration together you'll have the total -- animation time, and if you compare it to the current time you can check -- if the animation has completed. -- A slightly more accurate and optimised way of checking if the animation has completed is by -- checking if the "animation_progress" is equal to "1" or if "animated_value" is equal to the -- third argument used when "Lerp" was called. if ( animation_start + animation_duration <= CurTime() ) then -- In this example we're just resetting the start time when the animation completes. animation_start = CurTime() end end )

local start, oldhp, newhp = 0, -1, -1 local barW = 200 local animationTime = 0.5 -- seconds hook.Add( "HUDPaint", "LerpAnimation", function() -- Local player still loading, do nothing if ( !IsValid( LocalPlayer() ) ) then return end local hp = LocalPlayer():Health() local maxhp = LocalPlayer():GetMaxHealth() -- The values are not initialized yet, do so right now if ( oldhp == -1 and newhp == -1 ) then oldhp = hp newhp = hp end -- You can use a different smoothing function here local smoothHP = Lerp( ( SysTime() - start ) / animationTime, oldhp, newhp ) -- Health was changed, initialize the animation if newhp ~= hp then -- Old animation is still in progress, adjust if ( smoothHP ~= hp ) then -- Pretend our current "smooth" position was the target so the animation will -- not jump to the old target and start to the new target from there newhp = smoothHP end oldhp = newhp start = SysTime() newhp = hp end draw.RoundedBox( 4, 100, 200, barW, 100, color_black ) draw.RoundedBox( 4, 100, 200, math.max( 0, smoothHP ) / maxhp * barW, 100, color_white ) end )