148 lines
4.6 KiB
C
148 lines
4.6 KiB
C
/*
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Copyright (C) 2004 Michael Liebscher
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Copyright (C) 2000 by DarkOne the Hacker
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* wolf_math.h: Wolfenstein 3-D math routines.
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*
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* Author: Michael Liebscher <johnnycanuck@users.sourceforge.net>
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*
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* Acknowledgement:
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* This code was derived from NewWolf, and was originally
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* written by DarkOne the Hacker.
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*
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*
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*/
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/*
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Notes:
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This module is implemented by wolf_math.c
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*/
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#ifndef __WOLF_MATH_H__
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#define __WOLF_MATH_H__
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#define FLOATTILE 65536.0f
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// Angle Direction Types & LUTs (Hard Coded! Please do not mess them)
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typedef enum {q_first, q_second, q_third, q_fourth} quadrant;
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typedef enum {dir4_east, dir4_north, dir4_west, dir4_south, dir4_nodir} dir4type;
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typedef enum { dir8_east, dir8_northeast, dir8_north, dir8_northwest, dir8_west,
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dir8_southwest, dir8_south, dir8_southeast, dir8_nodir} dir8type;
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extern char dx4dir[5], dy4dir[5], dx8dir[9], dy8dir[9];
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extern dir4type opposite4[5], dir4d[3][3];
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extern dir8type opposite8[9], dir4to8[5], diagonal[9][9];
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extern int dir8angle[9], dir4angle[5];
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// ------------------------- * Vectors * -------------------------
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// Vectors & angles for 3D-Space
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typedef struct
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{
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long origin[2];
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long angle;
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} placeonplane_t;
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// ------------------------- * Some Macroses * -------------------------
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#define max_of_2(a, b) ((a)>(b)?(a):(b))
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#define LABS(x) ((long)(x)>0?(x):-(x))
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#define TILE2POS(a) (((a)<<TILESHIFT)+HALFTILE)
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#define POS2TILE(a) ((a)>>TILESHIFT)
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#define POS2TILEf(a) ((a)/FLOATTILE)
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// ------------------------- * vvv FINE angles vvv * -------------------------
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#define ASTEP 0.0078125f // 1 FINE=x DEGREES
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#define ASTEPRAD 0.000136354f // 1 FINE=x RADIANS
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#define ANG_1RAD 7333.8598 // 1 RADIAN=x FINES
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#define ANG_0 0 //(int)((float)0/ASTEP)
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#define ANG_1 128 //(int)((float)1/ASTEP)
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#define ANG_6 768 //(int)((float)6/ASTEP)
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#define ANG_15 1920 //(int)((float)15/ASTEP)
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#define ANG_22_5 2880 //(int)((float)22.5/ASTEP)
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#define ANG_30 3840 //(int)((float)30/ASTEP)
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#define ANG_45 5760 //(int)((float)45/ASTEP)
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#define ANG_67_5 8640 //(int)((float)67.5/ASTEP)
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#define ANG_90 11520 //(int)((float)90/ASTEP)
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#define ANG_112_5 14400 //(int)((float)112.5/ASTEP)
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#define ANG_135 17280 //(int)((float)135/ASTEP)
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#define ANG_157_5 20160 //(int)((float)157.5/ASTEP)
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#define ANG_180 23040 //(int)((float)180/ASTEP)
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#define ANG_202_5 25920 //(int)((float)202.5/ASTEP)
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#define ANG_225 28800 //(int)((float)225/ASTEP)
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#define ANG_247_5 31680 //(int)((float)247.5/ASTEP)
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#define ANG_270 34560 //(int)((float)270/ASTEP)
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#define ANG_292_5 37440 //(int)((float)292.5/ASTEP)
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#define ANG_315 40320 //(int)((float)225/ASTEP)
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#define ANG_337_5 43200 //(int)((float)337.5/ASTEP)
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#define ANG_360 46080 //(int)((float)360/ASTEP)
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// ------------------------- * ^^^ FINE angles ^^^ * -------------------------
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#define FINE2RAD( a ) (((a) * M_PI ) / ANG_180)
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#define RAD2FINE( a ) (((a) * ANG_180) / M_PI)
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#define FINE2DEG( a ) ((float)(a) / ANG_1) // !@# don't lose precision bits
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#define FINE2DEGf( a ) ((a) / (float)ANG_1)
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#define DEG2FINE( a ) ((a) * ANG_1)
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extern double SinTable[], *CosTable, TanTable[ ANG_360 + 1 ];
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extern int XnextTable[ ANG_360 + 1], YnextTable[ ANG_360 + 1 ];
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extern int ColumnAngle[640]; //
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extern int G_Build_Tables(void);
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#define TanDgr( x ) (tan( DEG2RAD( x ) ))
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#define SinDgr( x ) (sin( DEG2RAD( x ) ))
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#define CosDgr( x ) (cos( DEG2RAD( x ) ))
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#define ArcTanDgr( x ) (RAD2DEG( atan( x ) ))
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#define ArcSinDgr( x ) (RAD2DEG( asin( x ) ))
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#define ArcCosDgr( x ) (RAD2DEG( acos( x ) ))
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extern int NormalizeAngle( int angle );
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extern int Point2LineDist( int x, int y, int a );
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extern int LineLen2Point( int x, int y, int a );
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extern quadrant GetQuadrant( float angle );
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extern dir4type Get4dir( float angle );
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extern dir8type Get8dir( float angle );
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extern float TransformPoint( double Point1X, double Point1Y, double Point2X, double Point2Y );
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#endif /* __WOLF_MATH_H__ */
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