wnsrc/gamemodes/base/gamemode/cl_hudpickup.lua

--[[
| This file was obtained through the combined efforts
| of Madbluntz & Plymouth Antiquarian Society.
|
| Credits: lifestorm, Gregory Wayne Rossel JR.,
| 	Maloy, DrPepper10 @ RIP, Atle!
|
| Visit for more: https://plymouth.thetwilightzone.ru/
--]]


GM.PickupHistory = {}
GM.PickupHistoryLast = 0
GM.PickupHistoryTop = ScrH() / 2
GM.PickupHistoryWide = 300
GM.PickupHistoryCorner = surface.GetTextureID( "gui/corner8" )

local function AddGenericPickup( self, itemname )
	local pickup		= {}
	pickup.time			= CurTime()
	pickup.name			= itemname
	pickup.holdtime		= 5
	pickup.font			= "DermaDefaultBold"
	pickup.fadein		= 0.04
	pickup.fadeout		= 0.3

	surface.SetFont( pickup.font )
	local w, h = surface.GetTextSize( pickup.name )
	pickup.height		= h
	pickup.width		= w

	--[[if ( self.PickupHistoryLast >= pickup.time ) then
		pickup.time = self.PickupHistoryLast + 0.05
	end]]

	table.insert( self.PickupHistory, pickup )
	self.PickupHistoryLast = pickup.time

	return pickup
end

--[[---------------------------------------------------------
	Name: gamemode:HUDWeaponPickedUp( wep )
	Desc: The game wants you to draw on the HUD that a weapon has been picked up
-----------------------------------------------------------]]
function GM:HUDWeaponPickedUp( wep )

	if ( !IsValid( LocalPlayer() ) || !LocalPlayer():Alive() ) then return end
	if ( !IsValid( wep ) ) then return end
	if ( !isfunction( wep.GetPrintName ) ) then return end

	local pickup = AddGenericPickup( self, wep:GetPrintName() )
	pickup.color = Color( 255, 200, 50, 255 )

end

--[[---------------------------------------------------------
	Name: gamemode:HUDItemPickedUp( itemname )
	Desc: An item has been picked up..
-----------------------------------------------------------]]
function GM:HUDItemPickedUp( itemname )

	if ( !IsValid( LocalPlayer() ) || !LocalPlayer():Alive() ) then return end

	local pickup = AddGenericPickup( self, "#" .. itemname )
	pickup.color = Color( 180, 255, 180, 255 )

end

--[[---------------------------------------------------------
	Name: gamemode:HUDAmmoPickedUp( itemname, amount )
	Desc: Ammo has been picked up..
-----------------------------------------------------------]]
function GM:HUDAmmoPickedUp( itemname, amount )

	if ( !IsValid( LocalPlayer() ) || !LocalPlayer():Alive() ) then return end

	-- Try to tack it onto an exisiting ammo pickup
	if ( self.PickupHistory ) then

		for k, v in pairs( self.PickupHistory ) do

			if ( v.name == "#" .. itemname .. "_ammo" ) then

				v.amount = tostring( tonumber( v.amount ) + amount )
				v.time = CurTime() - v.fadein
				return

			end

		end

	end

	local pickup = AddGenericPickup( self, "#" .. itemname .. "_ammo" )
	pickup.color = Color( 180, 200, 255, 255 )
	pickup.amount = tostring( amount )

	local w, h = surface.GetTextSize( pickup.amount )
	pickup.width = pickup.width + w + 16

end

function GM:HUDDrawPickupHistory()

	if ( self.PickupHistory == nil ) then return end

	local x, y = ScrW() - self.PickupHistoryWide - 20, self.PickupHistoryTop
	local tall = 0
	local wide = 0

	for k, v in pairs( self.PickupHistory ) do

		if ( !istable( v ) ) then

			Msg( tostring( v ) .. "\n" )
			PrintTable( self.PickupHistory )
			self.PickupHistory[ k ] = nil
			return
		end

		if ( v.time < CurTime() ) then

			if ( v.y == nil ) then v.y = y end

			v.y = ( v.y * 5 + y ) / 6

			local delta = ( v.time + v.holdtime ) - CurTime()
			delta = delta / v.holdtime

			local alpha = 255
			local colordelta = math.Clamp( delta, 0.6, 0.7 )

			-- Fade in/out
			if ( delta > 1 - v.fadein ) then
				alpha = math.Clamp( ( 1.0 - delta ) * ( 255 / v.fadein ), 0, 255 )
			elseif ( delta < v.fadeout ) then
				alpha = math.Clamp( delta * ( 255 / v.fadeout ), 0, 255 )
			end

			v.x = x + self.PickupHistoryWide - ( self.PickupHistoryWide * ( alpha / 255 ) )

			local rx, ry, rw, rh = math.Round( v.x - 4 ), math.Round( v.y - ( v.height / 2 ) - 4 ), math.Round( self.PickupHistoryWide + 9 ), math.Round( v.height + 8 )
			local bordersize = 8

			surface.SetTexture( self.PickupHistoryCorner )

			surface.SetDrawColor( v.color.r, v.color.g, v.color.b, alpha )
			surface.DrawTexturedRectRotated( rx + bordersize / 2, ry + bordersize / 2, bordersize, bordersize, 0 )
			surface.DrawTexturedRectRotated( rx + bordersize / 2, ry + rh -bordersize / 2, bordersize, bordersize, 90 )
			surface.DrawRect( rx, ry + bordersize, bordersize, rh-bordersize * 2 )
			surface.DrawRect( rx + bordersize, ry, v.height - 4, rh )

			surface.SetDrawColor( 230 * colordelta, 230 * colordelta, 230 * colordelta, alpha )
			surface.DrawTexturedRectRotated( rx + rw - bordersize / 2 , ry + rh - bordersize / 2, bordersize, bordersize, 180 )
			surface.DrawTexturedRectRotated( rx + rw - bordersize / 2 , ry + bordersize / 2, bordersize, bordersize, 270 )
			surface.DrawRect( rx + rw - bordersize, ry + bordersize, bordersize, rh-bordersize * 2 )
			surface.DrawRect( rx + bordersize + v.height - 4, ry, rw - ( v.height - 4 ) - bordersize * 2, rh )

			draw.SimpleText( v.name, v.font, v.x + v.height + 9, ry + ( rh / 2 ) + 1, Color( 0, 0, 0, alpha * 0.5 ), TEXT_ALIGN_LEFT, TEXT_ALIGN_CENTER )
			draw.SimpleText( v.name, v.font, v.x + v.height + 8, ry + ( rh / 2 ), Color( 255, 255, 255, alpha ), TEXT_ALIGN_LEFT, TEXT_ALIGN_CENTER )

			if ( v.amount ) then

				draw.SimpleText( v.amount, v.font, v.x + self.PickupHistoryWide + 1, ry + ( rh / 2 ) + 1, Color( 0, 0, 0, alpha * 0.5 ), TEXT_ALIGN_RIGHT, TEXT_ALIGN_CENTER )
				draw.SimpleText( v.amount, v.font, v.x + self.PickupHistoryWide, ry + ( rh / 2 ), Color( 255, 255, 255, alpha ), TEXT_ALIGN_RIGHT, TEXT_ALIGN_CENTER )

			end

			y = y + ( v.height + 16 )
			tall = tall + v.height + 18
			wide = math.max( wide, v.width + v.height + 24 )

			if ( alpha == 0 ) then self.PickupHistory[ k ] = nil end

		end

	end

	self.PickupHistoryTop = ( self.PickupHistoryTop * 5 + ( ScrH() * 0.75 - tall ) / 2 ) / 6
	self.PickupHistoryWide = ( self.PickupHistoryWide * 5 + wide ) / 6

end