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tables.h
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/* Emacs style mode select -*- C++ -*-
*-----------------------------------------------------------------------------
*
*
* PrBoom: a Doom port merged with LxDoom and LSDLDoom
* based on BOOM, a modified and improved DOOM engine
* Copyright (C) 1999 by
* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
* Copyright (C) 1999-2000 by
* Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
* Copyright 2005, 2006 by
* Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
* Copyright 2023, 2024 by
* Frenkel Smeijers
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* DESCRIPTION:
* Lookup tables.
* Do not try to look them up :-).
* In the order of appearance:
*
* int finesine[10240] - Sine lookup.
* Guess what, serves as cosine, too.
* Remarkable thing is, how to use BAMs with this?
*
*-----------------------------------------------------------------------------*/
#ifndef __TABLES__
#define __TABLES__
#include "doomdef.h"
#include "m_fixed.h"
#define FINEANGLES 8192
#define FINEMASK (FINEANGLES-1)
// 0x100000000 to 0x2000
#define ANGLETOFINESHIFT 19
#define ANGLETOFINESHIFT_16 3
// Binary Angle Measument, BAM.
#define ANG45 0x20000000
#define ANG90 0x40000000
#define ANG180 0x80000000
#define ANG270 0xc0000000
#define ANG45_16 0x2000
#define ANG90_16 0x4000
#define ANG180_16 0x8000
#define ANG270_16 0xc000
typedef uint32_t angle_t;
typedef uint16_t angle16_t;
fixed_t finesine(int16_t x);
fixed_t finecosine(int16_t x);
fixed_t finesineapprox(int16_t x);
fixed_t finecosineapprox(int16_t x);
extern const uint16_t xtoviewangleTable[VIEWWINDOWWIDTH + 1];
#endif