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90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
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/*
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===========================================================================
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Doom 3 BFG Edition GPL Source Code
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Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
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Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#ifndef __TABLES__
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#define __TABLES__
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#ifdef LINUX
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#include <math.h>
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#else
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const float PI = 3.141592657f;
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#endif
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#include "m_fixed.h"
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#define FINEANGLES 8192
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#define FINEMASK (FINEANGLES-1)
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// 0x100000000 to 0x2000
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#define ANGLETOFINESHIFT 19
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// Effective size is 10240.
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const extern fixed_t finesine[5*FINEANGLES/4];
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// Re-use data, is just PI/2 pahse shift.
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const extern fixed_t* finecosine;
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// Effective size is 4096.
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const extern fixed_t finetangent[FINEANGLES/2];
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// Binary Angle Measument, BAM.
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#define ANG45 0x20000000u
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#define ANG90 0x40000000u
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#define ANG180 0x80000000u
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#define ANG270 0xc0000000u
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#define SLOPERANGE 2048
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#define SLOPEBITS 11
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#define DBITS (FRACBITS-SLOPEBITS)
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typedef unsigned angle_t;
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// Effective size is 2049;
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// The +1 size is to handle the case when x==y
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// without additional checking.
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const extern angle_t tantoangle[SLOPERANGE+1];
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// Utility function,
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// called by R_PointToAngle.
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int
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SlopeDiv
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( unsigned num,
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unsigned den);
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#endif
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