147 lines
4.9 KiB
C
147 lines
4.9 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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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.
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See the 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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// mathlib.h
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#ifndef __MATHLIB_H__
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#define __MATHLIB_H__
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//Dan East:
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#include "FixedPointMath.h"
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#ifdef USE_PQ_OPT
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typedef int fpvec3[3];
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#endif
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typedef fixedpoint_t vec3_FPM_t[3];
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typedef fixedpoint8_24_t vec3_8_24FPM_t[3];
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typedef fixedpoint_t vec5_FPM_t[5];
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//End Dan
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typedef float vec_t;
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typedef vec_t vec3_t[3];
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typedef vec_t vec5_t[5];
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typedef int fixed4_t;
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typedef int fixed8_t;
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typedef int fixed16_t;
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#ifndef M_PI
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#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h
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#endif
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//struct mplane_s;
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extern vec3_t vec3_origin;
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extern vec3_FPM_t vec3_originFPM;
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extern int nanmask;
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#define IS_NAN(x) (((*(int *)&x)&nanmask)==nanmask)
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//Dan East:
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#define DotProductFPM(x,y) FPM_ADD3(FPM_MUL(x[0],y[0]),FPM_MUL(x[1],y[1]),FPM_MUL(x[2],y[2]))
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#define DotProduct8_24FPM(x,y) fpm_Add3(fpm_MulMixed8_24(x[0],y[0]),fpm_MulMixed8_24(x[1],y[1]),fpm_MulMixed8_24(x[2],y[2]))
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#define VectorSubtractFPM(a,b,c) {c[0]=FPM_SUB(a[0],b[0]);c[1]=FPM_SUB(a[1],b[1]);c[2]=FPM_SUB(a[2],b[2]);}
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#define VectorAddFPM(a,b,c) {c[0]=FPM_ADD(a[0],b[0]);c[1]=FPM_ADD(a[1],b[1]);c[2]=FPM_ADD(a[2],b[2]);}
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//Int the following two macros b represents the destination (following ID's convention)
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#define VectorToFPM(a,b) {b[0]=FPM_FROMFLOAT(a[0]);b[1]=FPM_FROMFLOAT(a[1]);b[2]=FPM_FROMFLOAT(a[2]);}
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#define FPMToVector(a,b) {b[0]=FPM_TOFLOAT(a[0]);b[1]=FPM_TOFLOAT(a[1]);b[2]=FPM_TOFLOAT(a[2]);}
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//End Dan
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#define DotProduct(x,y) (x[0]*y[0]+x[1]*y[1]+x[2]*y[2])
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#define VectorSubtract(a,b,c) {c[0]=a[0]-b[0];c[1]=a[1]-b[1];c[2]=a[2]-b[2];}
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#define VectorAdd(a,b,c) {c[0]=a[0]+b[0];c[1]=a[1]+b[1];c[2]=a[2]+b[2];}
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//Dan: Can't this be done with memcpy?
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#define VectorCopy(a,b) {b[0]=a[0];b[1]=a[1];b[2]=a[2];}
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void VectorMA (vec3_t veca, float scale, vec3_t vecb, vec3_t vecc);
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void VectorMAFPM (vec3_FPM_t veca, fixedpoint_t scale, vec3_FPM_t vecb, vec3_FPM_t vecc);
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int VectorCompare (vec3_t v1, vec3_t v2);
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vec_t Length (vec3_t v);
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fixedpoint_t LengthFPM (vec3_FPM_t v);
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void CrossProduct (vec3_t v1, vec3_t v2, vec3_t cross);
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void CrossProductFPM (vec3_FPM_t v1, vec3_FPM_t v2, vec3_FPM_t cross);
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float VectorNormalize (vec3_t v); // returns vector length
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fixedpoint_t VectorNormalizeFPM (vec3_FPM_t v); // returns vector length
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void VectorInverse (vec3_t v);
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void VectorInverseFPM (vec3_FPM_t v);
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void VectorScale (vec3_t in, vec_t scale, vec3_t out);
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void VectorScaleFPM (vec3_FPM_t in, fixedpoint_t scale, vec3_FPM_t out);
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int Q_log2(int val);
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void R_ConcatRotations (float in1[3][3], float in2[3][3], float out[3][3]);
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void R_ConcatRotationsFPM (fixedpoint_t in1[3][3], fixedpoint_t in2[3][3], fixedpoint_t out[3][3]);
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void R_ConcatTransforms (float in1[3][4], float in2[3][4], float out[3][4]);
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void R_ConcatTransformsFPM (fixedpoint_t in1[3][4], fixedpoint_t in2[3][4], fixedpoint_t out[3][4]);
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void R_ConcatTransforms8_24FPM (fixedpoint_t in1[3][4], fixedpoint_t in2[3][4], fixedpoint8_24_t out[3][4]);
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void FloorDivMod (double numer, double denom, int *quotient,
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int *rem);
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fixed16_t Invert24To16(fixed16_t val);
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int GreatestCommonDivisor (int i1, int i2);
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void AngleVectors (vec3_t angles, vec3_t forward, vec3_t right, vec3_t up);
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void AngleVectorsFPM (vec3_FPM_t angles, vec3_FPM_t forward, vec3_FPM_t right, vec3_FPM_t up);
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//int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct mplane_s *plane);
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//int BoxOnPlaneSideFPM (vec3_FPM_t emins, vec3_FPM_t emaxs, struct mplane_FPM_s *plane);
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float anglemod(float a);
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fixedpoint_t anglemodFPM(fixedpoint_t a);
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#define BOX_ON_PLANE_SIDE(emins, emaxs, p) \
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(((p)->type < 3)? \
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( \
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((p)->dist <= (emins)[(p)->type])? \
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1 \
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: \
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( \
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((p)->dist >= (emaxs)[(p)->type])?\
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2 \
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: \
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3 \
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) \
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) \
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: \
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BoxOnPlaneSide( (emins), (emaxs), (p)))
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#define BOX_ON_PLANE_SIDE_FPM(emins, emaxs, p) \
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(((p)->type < 3)? \
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( \
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((p)->dist <= (emins)[(p)->type])? \
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1 \
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: \
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( \
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((p)->dist >= (emaxs)[(p)->type])?\
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2 \
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: \
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3 \
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) \
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) \
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: \
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BoxOnPlaneSideFPM( (emins), (emaxs), (p)))
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int ParseFloats(char *s, float *f, int *f_size);
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#endif // _MATHLIB_H_
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