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diff --git a/demos/3rdparty/doom/tables.h b/demos/3rdparty/doom/tables.h
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-// Emacs style mode select -*- C++ -*-
-//-----------------------------------------------------------------------------
-//
-// $Id:$
-//
-// Copyright (C) 1993-1996 by id Software, Inc.
-//
-// This source is available for distribution and/or modification
-// only under the terms of the DOOM Source Code License as
-// published by id Software. All rights reserved.
-//
-// The source is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
-// for more details.
-//
-// DESCRIPTION:
-// Lookup tables.
-// Do not try to look them up :-).
-// In the order of appearance:
-//
-// int finetangent[4096] - Tangens LUT.
-// Should work with BAM fairly well (12 of 16bit,
-// effectively, by shifting).
-//
-// int finesine[10240] - Sine lookup.
-// Guess what, serves as cosine, too.
-// Remarkable thing is, how to use BAMs with this?
-//
-// int tantoangle[2049] - ArcTan LUT,
-// maps tan(angle) to angle fast. Gotta search.
-//
-//-----------------------------------------------------------------------------
-
-
-#ifndef __TABLES__
-#define __TABLES__
-
-
-
-#ifdef LINUX
-#include <math.h>
-#else
-#define PI 3.141592657
-#endif
-
-
-#include "m_fixed.h"
-
-#define FINEANGLES 8192
-#define FINEMASK (FINEANGLES-1)
-
-
-// 0x100000000 to 0x2000
-#define ANGLETOFINESHIFT 19
-
-// Effective size is 10240.
-extern const fixed_t finesine[5*FINEANGLES/4];
-
-// Re-use data, is just PI/2 pahse shift.
-extern const fixed_t* finecosine;
-
-
-// Effective size is 4096.
-extern const fixed_t finetangent[FINEANGLES/2];
-
-// Binary Angle Measument, BAM.
-#define ANG45 0x20000000
-#define ANG90 0x40000000
-#define ANG180 0x80000000
-#define ANG270 0xc0000000
-
-
-#define SLOPERANGE 2048
-#define SLOPEBITS 11
-#define DBITS (FRACBITS-SLOPEBITS)
-
-typedef unsigned angle_t;
-
-
-// Effective size is 2049;
-// The +1 size is to handle the case when x==y
-// without additional checking.
-extern const angle_t tantoangle[SLOPERANGE+1];
-
-
-// Utility function,
-// called by R_PointToAngle.
-int
-SlopeDiv
-( unsigned num,
- unsigned den);
-
-
-#endif
-//-----------------------------------------------------------------------------
-//
-// $Log:$
-//
-//-----------------------------------------------------------------------------