135 lines
4.9 KiB
C
135 lines
4.9 KiB
C
// SONIC ROBO BLAST 2
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//-----------------------------------------------------------------------------
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// Copyright (C) 1993-1996 by id Software, Inc.
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// Copyright (C) 1998-2000 by DooM Legacy Team.
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// Copyright (C) 1999-2018 by Sonic Team Junior.
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//
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// This program is free software distributed under the
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// terms of the GNU General Public License, version 2.
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// See the 'LICENSE' file for more details.
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//-----------------------------------------------------------------------------
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/// \file tables.h
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/// \brief Lookup tables
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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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#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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#define ANGLETOFINESHIFT 19 // 0x100000000 to 0x2000
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#define FINEANGLE_C(x) ((FixedAngle((x)*FRACUNIT)>>ANGLETOFINESHIFT) & FINEMASK) // ((x*(ANGLE_45/45))>>ANGLETOFINESHIFT) & FINEMASK
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#if !(defined _NDS) || !(defined NONET)
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// Effective size is 10240.
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extern fixed_t finesine[5*FINEANGLES/4];
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// Re-use data, is just PI/2 phase shift.
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extern fixed_t *finecosine;
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// Effective size is 4096.
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extern fixed_t finetangent[FINEANGLES/2];
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#endif
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#define ANG1 0x00B60B61 //0.B6~
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#define ANG2 0x016C16C1 //.6C1~
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#define ANG10 0x071C71C7 //.1C7~
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#define ANG15 0x0AAAAAAB //A.AA~
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#define ANG20 0x0E38E38E //.38E~
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#define ANG30 0x15555555 //.555~
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#define ANG60 0x2AAAAAAB //A.AA~
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#define ANG64h 0x2DDDDDDE //D.DD~
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#define ANG105 0x4AAAAAAB //A.AA~
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#define ANG210 0x95555555 //.555~
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#define ANG255 0xB5555555 //.555~
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#define ANG340 0xF1C71C72 //1.C7~
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#define ANG350 0xF8E38E39 //8.E3~
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#define ANGLE_11hh 0x08000000
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#define ANGLE_22h 0x10000000
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#define ANGLE_45 0x20000000
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#define ANGLE_67h 0x30000000
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#define ANGLE_90 0x40000000
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#define ANGLE_112h 0x50000000
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#define ANGLE_135 0x60000000
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#define ANGLE_157h 0x70000000
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#define ANGLE_180 0x80000000
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#define ANGLE_202h 0x90000000
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#define ANGLE_225 0xA0000000
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#define ANGLE_247h 0xB0000000
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#define ANGLE_270 0xC0000000
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#define ANGLE_292h 0xD0000000
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#define ANGLE_315 0xE0000000
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#define ANGLE_337h 0xF0000000
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#define ANGLE_MAX 0xFFFFFFFF
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// SRB2kart
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#define ANGLE_120 0x53333333
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#define ANGLE_240 0xA6666666
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typedef UINT32 angle_t;
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// To get a global angle from Cartesian coordinates, the coordinates are
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// flipped until they are in the first octant of the coordinate system, then
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// the y (<=x) is scaled and divided by x to get a tangent (slope) value
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// which is looked up in the tantoangle[] table.
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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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// The +1 size is to handle the case when x == y without additional checking.
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extern angle_t tantoangle[SLOPERANGE+1];
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// Utility function, called by R_PointToAngle.
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FUNCMATH unsigned SlopeDiv(unsigned num, unsigned den);
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// Only called by R_PointToAngleEx
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UINT64 SlopeDivEx(unsigned int num, unsigned int den);
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// 360 - angle_t(ANGLE_45) = ANGLE_315
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FUNCMATH FUNCINLINE static ATTRINLINE angle_t InvAngle(angle_t a)
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{
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return (ANGLE_MAX-a)+1;
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}
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// angle_t to fixed_t f(ANGLE_45) = 45*FRACUNIT
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FUNCMATH fixed_t AngleFixed(angle_t af);
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// fixed_t to angle_t f(45*FRACUNIT) = ANGLE_45
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FUNCMATH angle_t FixedAngle(fixed_t fa);
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// and with a factor, with +factor for (fa/factor) and -factor for (fa*factor)
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FUNCMATH angle_t FixedAngleC(fixed_t fa, fixed_t factor);
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/// The FixedAcos function
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FUNCMATH angle_t FixedAcos(fixed_t x);
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/// Fixed Point Vector functions
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angle_t FV2_AngleBetweenVectors(const vector2_t *Vector1, const vector2_t *Vector2);
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angle_t FV3_AngleBetweenVectors(const vector3_t *Vector1, const vector3_t *Vector2);
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boolean FV2_InsidePolygon(const vector2_t *vIntersection, const vector2_t *Poly, const INT32 vertexCount);
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boolean FV3_InsidePolygon(const vector3_t *vIntersection, const vector3_t *Poly, const INT32 vertexCount);
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boolean FV3_IntersectedPolygon(const vector3_t *vPoly, const vector3_t *vLine, const INT32 vertexCount, vector3_t *collisionPoint);
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void FV3_Rotate(vector3_t *rotVec, const vector3_t *axisVec, const angle_t angle);
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/// Fixed Point Matrix functions
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void FM_Rotate(matrix_t *dest, angle_t angle, fixed_t x, fixed_t y, fixed_t z);
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// The table values in tables.c are calculated with this many fractional bits.
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#define FINE_FRACBITS 16
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#if (defined _NDS) && (defined NONET)
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// Use the NDS's trig functions. This would break netplay, so we only do
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// it if NONET is defined.
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#define FINESINE(n) ((fixed_t)sinLerp((INT16)(((INT32)(n))<<(ANGLETOFINESHIFT-17))) << (FRACBITS - 12))
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#define FINECOSINE(n) ((fixed_t)cosLerp((INT16)(((INT32)(n))<<(ANGLETOFINESHIFT-17))) << (FRACBITS - 12))
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#define FINETANGENT(n) ((fixed_t)tanLerp((INT16)(((INT32)(n)-(FINEANGLES>>2))<<(ANGLETOFINESHIFT-17))) << (FRACBITS - 12))
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#else
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// These macros should be used in case FRACBITS < FINE_FRACBITS.
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#define FINESINE(n) (finesine[n]>>(FINE_FRACBITS-FRACBITS))
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#define FINECOSINE(n) (finecosine[n]>>(FINE_FRACBITS-FRACBITS))
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#define FINETANGENT(n) (finetangent[n]>>(FINE_FRACBITS-FRACBITS))
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#endif
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#endif
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