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/*
* QWProgs-DM
* Copyright (C) 2004 [sd] angel
*
* This code is based on QuakeWorld DM mod code by Id Software, Inc.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* $Id$
*/
// mathlib.h
//typedef float vec_t;
//typedef vec_t vec3_t[3];
//typedef vec_t vec5_t[5];
typedef int fixed4_t;
typedef int fixed8_t;
typedef int fixed16_t;
#ifndef M_PI
#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h
#endif
typedef struct mplane_s
{
vec3_t normal;
float dist;
byte type; // for texture axis selection and fast side tests
byte signbits; // signx + signy<<1 + signz<<1
byte pad[2];
} mplane_t;
extern vec3_t vec3_origin;
extern int nanmask;
#define IS_NAN(x) (((*(int *)&x)&nanmask)==nanmask)
#define Q_rint(x) ((x) > 0 ? (int)((x) + 0.5) : (int)((x) - 0.5))
#define DotProduct(x,y) (x[0]*y[0]+x[1]*y[1]+x[2]*y[2])
#define VectorSubtract(a,b,c) {c[0]=a[0]-b[0];c[1]=a[1]-b[1];c[2]=a[2]-b[2];}
#define VectorAdd(a,b,c) {c[0]=a[0]+b[0];c[1]=a[1]+b[1];c[2]=a[2]+b[2];}
#define VectorCopy(a,b) {b[0]=a[0];b[1]=a[1];b[2]=a[2];}
#define VectorClear(a) (a[0]=a[1]=a[2]=0)
#define VectorSet(v,x,y,z) (v[0]=(x),v[1]=(y),v[2]=(z))
void VectorMA(vec3_t veca, float scale, vec3_t vecb, vec3_t vecc);
vec_t _DotProduct(vec3_t v1, vec3_t v2);
void _VectorSubtract(vec3_t veca, vec3_t vecb, vec3_t out);
void _VectorAdd(vec3_t veca, vec3_t vecb, vec3_t out);
void _VectorCopy(vec3_t in, vec3_t out);
int VectorCompare(vec3_t v1, vec3_t v2);
int VectorCompareF(vec3_t v1, float x, float y, float z);
vec_t VectorLength(vec3_t v);
float VectorDistance(vec3_t v1, vec3_t v2);
void CrossProduct(vec3_t v1, vec3_t v2, vec3_t cross);
float VectorNormalize(vec3_t v); // returns vector length
void VectorInverse(vec3_t v);
void VectorScale(vec3_t in, vec_t scale, vec3_t out);
int Q_log2(int val);
void R_ConcatRotations(float in1[3][3], float in2[3][3], float out[3][3]);
void R_ConcatTransforms(float in1[3][4], float in2[3][4], float out[3][4]);
void FloorDivMod(double numer, double denom, int *quotient, int *rem);
fixed16_t Invert24To16(fixed16_t val);
fixed16_t Mul16_30(fixed16_t multiplier, fixed16_t multiplicand);
int GreatestCommonDivisor(int i1, int i2);
void AngleVectors(vec3_t angles, vec3_t forward, vec3_t right, vec3_t up);
int BoxOnPlaneSide(vec3_t emins, vec3_t emaxs, struct mplane_s *plane);
float anglemod(float a);
void RotatePointAroundVector(vec3_t dst, const vec3_t dir, const vec3_t point, float degrees);
#define BOX_ON_PLANE_SIDE(emins, emaxs, p) \
(((p)->type < 3)? \
( \
((p)->dist <= (emins)[(p)->type])? \
1 \
: \
( \
((p)->dist >= (emaxs)[(p)->type])?\
2 \
: \
3 \
) \
) \
: \
BoxOnPlaneSide( (emins), (emaxs), (p)))
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