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lua/derma/derma_animation.lua

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+--[[
+| 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/
+--]]
+
+
+local DermaAnimation = {}
+DermaAnimation.__index = DermaAnimation
+
+function DermaAnimation:Run()
+
+	if ( !self.Running ) then return end
+
+	local time = SysTime()
+	local delta = ( time - self.StartTime ) / self.Length
+	delta = delta ^ ( 1.0 - ( delta - 0.5 ) )
+
+	-- If we have ended we run once more with the Finished member set
+	-- This allows us to clean up in the same function..
+	if ( time > self.EndTime ) then
+
+		self.Finished = true
+		self.Running = nil
+		delta = 1
+
+	end
+
+	self.Func( self.Panel, self, delta, self.Data )
+	self.Started = nil
+
+end
+
+
+function DermaAnimation:Start( Length, Data )
+
+	if ( self.Length == 0 ) then return end
+
+	self.Running = true
+	self.Started = true
+	self.Finished = nil
+	self.Length = Length
+	self.StartTime = SysTime()
+	self.EndTime = SysTime() + Length
+
+	self.Data = Data
+
+end
+
+function DermaAnimation:Stop()
+
+	if ( !self.Running ) then return end
+
+	self.Finished = true
+	self.Running = nil
+
+end
+
+function DermaAnimation:Active()
+
+	return self.Running
+
+end
+
+function Derma_Anim( name, panel, func )
+
+	local anim = {}
+	anim.Name = name
+	anim.Panel = panel
+	anim.Func = func
+
+	setmetatable( anim, DermaAnimation )
+
+	return anim
+
+end