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gamemodes/sandbox/entities/weapons/gmod_tool/ghostentity.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/
+--]]
+
+
+--[[---------------------------------------------------------
+	Starts up the ghost entity
+	The most important part of this is making sure it gets deleted properly
+-----------------------------------------------------------]]
+function ToolObj:MakeGhostEntity( model, pos, angle )
+
+	util.PrecacheModel( model )
+
+	-- We do ghosting serverside in single player
+	-- It's done clientside in multiplayer
+	if ( SERVER && !game.SinglePlayer() ) then return end
+	if ( CLIENT && game.SinglePlayer() ) then return end
+
+	-- The reason we need this is because in multiplayer, when you holster a tool serverside,
+	-- either by using the spawnnmenu's Weapons tab or by simply entering a vehicle,
+	-- the Think hook is called once after Holster is called on the client, recreating the ghost entity right after it was removed.
+	if ( !IsFirstTimePredicted() ) then return end
+
+	-- Release the old ghost entity
+	self:ReleaseGhostEntity()
+
+	-- Don't allow ragdolls/effects to be ghosts
+	if ( !util.IsValidProp( model ) ) then return end
+
+	if ( CLIENT ) then
+		self.GhostEntity = ents.CreateClientProp( model )
+	else
+		self.GhostEntity = ents.Create( "prop_physics" )
+	end
+
+	-- If there's too many entities we might not spawn..
+	if ( !IsValid( self.GhostEntity ) ) then
+		self.GhostEntity = nil
+		return
+	end
+
+	self.GhostEntity:SetModel( model )
+	self.GhostEntity:SetPos( pos )
+	self.GhostEntity:SetAngles( angle )
+	self.GhostEntity:Spawn()
+
+	-- We do not want physics at all
+	self.GhostEntity:PhysicsDestroy()
+
+	-- SOLID_NONE causes issues with Entity.NearestPoint used by Wheel tool
+	--self.GhostEntity:SetSolid( SOLID_NONE )
+	self.GhostEntity:SetMoveType( MOVETYPE_NONE )
+	self.GhostEntity:SetNotSolid( true )
+	self.GhostEntity:SetRenderMode( RENDERMODE_TRANSCOLOR )
+	self.GhostEntity:SetColor( Color( 255, 255, 255, 150 ) )
+
+end
+
+--[[---------------------------------------------------------
+	Starts up the ghost entity
+	The most important part of this is making sure it gets deleted properly
+-----------------------------------------------------------]]
+function ToolObj:StartGhostEntity( ent )
+
+	-- We do ghosting serverside in single player
+	-- It's done clientside in multiplayer
+	if ( SERVER && !game.SinglePlayer() ) then return end
+	if ( CLIENT && game.SinglePlayer() ) then return end
+
+	self:MakeGhostEntity( ent:GetModel(), ent:GetPos(), ent:GetAngles() )
+
+end
+
+--[[---------------------------------------------------------
+	Releases up the ghost entity
+-----------------------------------------------------------]]
+function ToolObj:ReleaseGhostEntity()
+
+	if ( self.GhostEntity ) then
+		if ( !IsValid( self.GhostEntity ) ) then self.GhostEntity = nil return end
+		self.GhostEntity:Remove()
+		self.GhostEntity = nil
+	end
+
+	-- This is unused!
+	if ( self.GhostEntities ) then
+
+		for k, v in pairs( self.GhostEntities ) do
+			if ( IsValid( v ) ) then v:Remove() end
+			self.GhostEntities[ k ] = nil
+		end
+
+		self.GhostEntities = nil
+	end
+
+	-- This is unused!
+	if ( self.GhostOffset ) then
+
+		for k, v in pairs( self.GhostOffset ) do
+			self.GhostOffset[ k ] = nil
+		end
+
+	end
+
+end
+
+--[[---------------------------------------------------------
+	Update the ghost entity
+-----------------------------------------------------------]]
+function ToolObj:UpdateGhostEntity()
+
+	if ( self.GhostEntity == nil ) then return end
+	if ( !IsValid( self.GhostEntity ) ) then self.GhostEntity = nil return end
+
+	local trace = self:GetOwner():GetEyeTrace()
+	if ( !trace.Hit ) then return end
+
+	local Ang1, Ang2 = self:GetNormal( 1 ):Angle(), ( trace.HitNormal * -1 ):Angle()
+	local TargetAngle = self:GetEnt( 1 ):AlignAngles( Ang1, Ang2 )
+
+	self.GhostEntity:SetPos( self:GetEnt( 1 ):GetPos() )
+	self.GhostEntity:SetAngles( TargetAngle )
+
+	local TranslatedPos = self.GhostEntity:LocalToWorld( self:GetLocalPos( 1 ) )
+	local TargetPos = trace.HitPos + ( self:GetEnt( 1 ):GetPos() - TranslatedPos ) + trace.HitNormal
+
+	self.GhostEntity:SetPos( TargetPos )
+
+end