| 0,0 → 1,98 |
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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__ |
| |
| |
| |
| #ifndef PI |
| #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 fixed_t finesine[5*FINEANGLES/4]; |
| |
| // Re-use data, is just PI/2 pahse shift. |
| extern fixed_t* finecosine; |
| |
| |
| // Effective size is 4096. |
| extern 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 angle_t tantoangle[SLOPERANGE+1]; |
| |
| |
| // Utility function, |
| // called by R_PointToAngle. |
| int |
| SlopeDiv |
| ( unsigned num, |
| unsigned den); |
| |
| |
| #endif |
| //----------------------------------------------------------------------------- |
| // |
| // $Log:$ |
| // |
| //----------------------------------------------------------------------------- |
| Property changes: |
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| Added: svn:executable |
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| +* |
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| \ No newline at end of property |
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