TOOL.Category		= "Render"
TOOL.Name			= "#Trails"
TOOL.Command		= nil
TOOL.ConfigName		= ""


TOOL.ClientConVar[ "r" ] = 255
TOOL.ClientConVar[ "g" ] = 255
TOOL.ClientConVar[ "b" ] = 255
TOOL.ClientConVar[ "a" ] = 255

TOOL.ClientConVar[ "length" ] = 5
TOOL.ClientConVar[ "startsize" ] = 32
TOOL.ClientConVar[ "endsize" ] = 0

TOOL.ClientConVar[ "material" ] = "sprites/obsolete"

cleanup.Register( "trails" )

// Add Default Language translation (saves adding it to the txt files)
if ( CLIENT ) then

	language.Add( "Tool_trails_name", "Trails" )
	language.Add( "Tool_trails_desc", "Add entity trail beams" )
	language.Add( "Tool_trails_0", "Left click on an entity to add a trail. Right click to remove" )
	
	language.Add( "Undone_trails", "Undone Trail" )
	
	language.Add( "Cleanup_trails", "Trails" )
	language.Add( "Cleaned_trails", "Cleaned up all Trails" )

end



local function SetTrails( Player, Entity, Data )

	if ( Entity.SToolTrail ) then
	
		Entity.SToolTrail:Remove()
		Entity.SToolTrail = nil
	
	end
	
	if (!Data) then
	
		duplicator.ClearEntityModifier( Entity, "trail" );
		return
		
	end
	
	if ( Data.StartSize == 0 ) then
	
		Data.StartSize = 0.0001;
		
	end
	
	

	local trail_entity = util.SpriteTrail( Entity,  //Entity
											0,  //iAttachmentID
											Data.Color,  //Color
											false, // bAdditive
											Data.StartSize, //fStartWidth
											Data.EndSize, //fEndWidth
											Data.Length, //fLifetime
											1 / ((Data.StartSize+Data.EndSize) * 0.5), //fTextureRes
											Data.Material .. ".vmt" ) //strTexture
	
	Entity.SToolTrail = trail_entity
	Player:AddCleanup( "trails", trail_entity )

	duplicator.StoreEntityModifier( Entity, "trail", Data )
	
	
	
	return trail_entity
	
end
duplicator.RegisterEntityModifier( "trail", SetTrails )

function TOOL:LeftClick( trace )

	if (!trace.Entity) then return false end
	if (!trace.Entity:IsValid()) then return false end
	if (!trace.Entity:EntIndex() == 0) then return false end
	if ( trace.Entity:IsPlayer() ) then return false end
	if (CLIENT) then return true end
	
	local r		= math.Clamp( self:GetClientNumber( "r", 255 ), 0, 255 )
	local g		= math.Clamp( self:GetClientNumber( "g", 255 ), 0, 255 )
	local b		= math.Clamp( self:GetClientNumber( "b", 255 ), 0, 255 )
	local a		= math.Clamp( self:GetClientNumber( "a", 255 ), 0, 255 )
	
	local length	= self:GetClientNumber( "length", 5 )
	local startsize	= self:GetClientNumber( "startsize", 32 )
	local endsize	= self:GetClientNumber( "endsize", 0 )
	local Mat		= self:GetClientInfo( "material", "sprites/obsolete" )
	
	// Clamp sizes in multiplayer
	if ( !SinglePlayer() ) then
	
		length 		= math.Clamp( length, 0.1, 10 )
		startsize 	= math.Clamp( startsize, 0, 128 )
		endsize 	= math.Clamp( endsize, 0, 128 )
	
	end

	local Trail = SetTrails( self:GetOwner(), trace.Entity, { Color = Color( r, g, b, a ), 
																	Length = length, 
																	StartSize = startsize, 
																	EndSize = endsize,
																	Material = Mat } )
	undo.Create("Trail")
		undo.AddEntity( Trail )
		undo.SetPlayer( ply )
	undo.Finish()

	return true
		
	
end

function TOOL:RightClick( trace )

	if (!trace.Entity) then return false end
	if (!trace.Entity:IsValid()) then return false end
	if (!trace.Entity:EntIndex() == 0) then return false end
	if ( trace.Entity:IsPlayer() ) then return false end
	if (CLIENT) then return true end

	SetTrails( self:GetOwner(), trace.Entity, nil )	
	return true
	
end

//
// Add default materials to list
// Note: Addons can easily add to this list in their 
// own file placed in autorun or something.
//
list.Set( "trail_materials", "#Plasma", 	"trails/plasma" )
list.Set( "trail_materials", "#Tube", 		"trails/tube" )
list.Set( "trail_materials", "#Electric", 	"trails/electric" )
list.Set( "trail_materials", "#Smoke", 		"trails/smoke" )
list.Set( "trail_materials", "#Laser", 		"trails/laser" )
list.Set( "trail_materials", "#PhysBeam", 	"trails/physbeam" )
list.Set( "trail_materials", "#Love", 		"trails/love" )
list.Set( "trail_materials", "#LoL", 		"trails/lol" )

function TOOL.BuildCPanel( CPanel )

	// HEADER
	CPanel:AddControl( "Header", { Text = "#Tool_trails_name", Description	= "#Tool_trails_desc" }  )
	
	// Presets
	local params = { Label = "#Presets", MenuButton = 1, Folder = "trails", Options = {}, CVars = {} }
		
		params.Options.default = {
			trails_r			= 		255,
			trails_g			=		255,
			trails_b			=		255,
			trails_a			=		255,
			trails_length		=		255,
			trails_startsize	=		16,
			trails_endsize		=		0
		}
			
		table.insert( params.CVars, "trails_r" )
		table.insert( params.CVars, "trails_g" )
		table.insert( params.CVars, "trails_b" )
		table.insert( params.CVars, "trails_a" )
		table.insert( params.CVars, "trails_length" )
		table.insert( params.CVars, "trails_startsize" )
		table.insert( params.CVars, "trails_endsize" )
		
	CPanel:AddControl( "ComboBox", params )
	
	CPanel:AddControl( "Color",  { Label	= "#Color",
									Red			= "trails_r",
									Green		= "trails_g",
									Blue		= "trails_b",
									Alpha		= "trails_a",
									ShowAlpha	= 1,
									ShowHSV		= 1,
									ShowRGB 	= 1,
									Multiplier	= 255 } )	
									
	CPanel:NumSlider( "#Length", "trails_length", 0, 10, 2 )
	CPanel:NumSlider( "#Start Size", "trails_startsize", 0, 128, 2 )
	CPanel:NumSlider( "#End Size", "trails_endsize", 0, 128, 2 )
									
	CPanel:MatSelect( "trails_material", list.Get( "trail_materials" ), true, 0.25, 0.25 )
									
end