mirror of
https://git.code.sf.net/p/quake/nuq
synced 2024-11-22 12:11:36 +00:00
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/*
|
|
mathlib.h
|
|
|
|
@description@
|
|
|
|
Copyright (C) 1996-1997 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:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
$Id$
|
|
*/
|
|
|
|
#ifndef __mathlib_h
|
|
#define __mathlib_h
|
|
|
|
#include <math.h>
|
|
#include "qtypes.h"
|
|
|
|
#ifndef M_PI
|
|
#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h
|
|
#endif
|
|
|
|
struct mplane_s;
|
|
|
|
extern vec3_t vec3_origin;
|
|
extern int nanmask;
|
|
|
|
#define IS_NAN(x) (((*(int *)&x)&nanmask)==nanmask)
|
|
|
|
#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];}
|
|
|
|
// up / down
|
|
#define PITCH 0
|
|
// left / right
|
|
#define YAW 1
|
|
// fall over
|
|
#define ROLL 2
|
|
|
|
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);
|
|
vec_t Length (vec3_t v);
|
|
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 RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
|
|
|
|
void FloorDivMod (double numer, double denom, int *quotient,
|
|
int *rem);
|
|
fixed16_t Invert24To16(fixed16_t val);
|
|
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);
|
|
|
|
|
|
|
|
#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)))
|
|
|
|
#endif // __mathlib_h
|