CreateClientConVar( "pp_dof", "0", false, false )	
CreateClientConVar( "pp_dof_initlength", "256", false, false )
CreateClientConVar( "pp_dof_spacing", "512", false, false )

// Global table to hold the DoF effect
DOF_Ents 		= {}
DOF_SPACING 	= 0
DOF_OFFSET 		= 0

local NUM_DOF_NODES = 16

function DOF_Kill( )

	for k, v in pairs(DOF_Ents) do
	
		if (v:IsValid()) then
			v:Remove()
		end
	
	end

	DOFModeHack( false )
	
end


function DOF_Start()

	DOF_Kill()
	
	for i=0, NUM_DOF_NODES do
		
		local effectdata = EffectData()
			effectdata:SetScale( i )
		util.Effect( "dof_node", effectdata )
	
	end
	
	DOFModeHack( true )

end


function DOF_Think( )

	local ply = LocalPlayer()
	if ( !ValidEntity( ply ) ) then return end
	
	DOF_SPACING = tonumber( ply:GetInfo("pp_dof_spacing") )
	DOF_OFFSET = tonumber( ply:GetInfo("pp_dof_initlength") )

end

hook.Add( "Think", "DOFThink", DOF_Think )


local function OnChange( name, oldvalue, newvalue )

	if ( !GAMEMODE:PostProcessPermitted( "dof" ) ) then	return end

	if ( newvalue != "0" ) then
		DOF_Start()
	else
		DOF_Kill()
	end

end

cvars.AddChangeCallback( "pp_dof", OnChange )


/*
// Control Panel
*/
local function BuildControlPanel( CPanel )

	CPanel:AddControl( "Header", { Text = "#Depth_Of_Field", Description = "#Depth_Of_Field_Information" }  )
	CPanel:AddControl( "CheckBox", { Label = "#Depth_Of_Field_Toggle", Command = "pp_dof" }  )
		
	CPanel:AddControl( "Slider", { Label = "#Depth_Of_Field_spacing", Command = "pp_dof_spacing", Type = "Float", Min = "8", Max = "1024" }  )	
	CPanel:AddControl( "Slider", { Label = "#Depth_Of_Field_start_distance", Command = "pp_dof_initlength", Type = "Float", Min = "9", Max = "1024" }  )	
	
end

/*
// Tool Menu
*/
local function AddPostProcessMenu()

	spawnmenu.AddToolMenuOption( "PostProcessing", "PPShader", "DoF", "#Simple DoF", "", "", BuildControlPanel, { SwitchConVar = "pp_dof" } )

end

hook.Add( "PopulateToolMenu", "AddPostProcessMenu_DoF", AddPostProcessMenu )