tsiry-sandratraina.com
A modern Music Player Daemon based on Rockbox open source high quality audio player
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/* Emacs style mode select -*- C++ -*-
2 *-----------------------------------------------------------------------------
3 *
4 *
5 * PrBoom a Doom port merged with LxDoom and LSDLDoom
6 * based on BOOM, a modified and improved DOOM engine
7 * Copyright (C) 1999 by
8 * id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
9 * Copyright (C) 1999-2000 by
10 * Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25 * 02111-1307, USA.
26 *
27 * DESCRIPTION:
28 * Lookup tables.
29 * Do not try to look them up :-).
30 * In the order of appearance:
31 *
32 * int finetangent[4096] - Tangens LUT.
33 * Should work with BAM fairly well (12 of 16bit,
34 * effectively, by shifting).
35 *
36 * int finesine[10240] - Sine lookup.
37 * Guess what, serves as cosine, too.
38 * Remarkable thing is, how to use BAMs with this?
39 *
40 * int tantoangle[2049] - ArcTan LUT,
41 * maps tan(angle) to angle fast. Gotta search.
42 *
43 *-----------------------------------------------------------------------------*/
44
45#ifndef __TABLES__
46#define __TABLES__
47
48#include "m_fixed.h"
49#include "rockmacros.h"
50
51#define FINEANGLES 8192
52#define FINEMASK (FINEANGLES-1)
53
54// 0x100000000 to 0x2000
55#define ANGLETOFINESHIFT 19
56
57#ifndef ALL_IN_ONE
58
59// TABLES_AS_LUMPS causes the tables to be loaded from a wad lump, and the normal
60// data to be stored as a predefined lump.
61// Only really useful for dumping the trig tables or with NO_PREDEFINED_LUMPS
62#define TABLES_AS_LUMPS
63#endif
64
65// Binary Angle Measument, BAM.
66#define ANG45 0x20000000
67#define ANG90 0x40000000
68#define ANG180 0x80000000
69#define ANG270 0xc0000000
70
71#define SLOPERANGE 2048
72#define SLOPEBITS 11
73#define DBITS (FRACBITS-SLOPEBITS)
74
75typedef unsigned angle_t;
76
77// Load trig tables if needed
78#ifdef TABLES_AS_LUMPS
79void R_LoadTrigTables(void);
80#define TRIG_CONST
81#else
82#define TRIG_CONST const
83#endif
84
85// Effective size is 10240.
86extern TRIG_CONST fixed_t *finesine;
87
88// Re-use data, is just PI/2 phase shift.
89extern TRIG_CONST fixed_t *finecosine;
90
91// Effective size is 4096.
92extern TRIG_CONST fixed_t *finetangent;
93
94// Effective size is 2049;
95// The +1 size is to handle the case when x==y without additional checking.
96
97extern TRIG_CONST angle_t *tantoangle;
98
99// Utility function, called by R_PointToAngle.
100int SlopeDiv(unsigned num, unsigned den);
101
102#undef TRIG_CONST
103#endif