100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/*
|
|
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 the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
// 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;
|
|
|
|
typedef float matrix_4x4[4][4]; // the standard 4x4 homogenous matrix
|
|
|
|
typedef float matrix_1x4[4]; // a 1x4 matrix or a row vector
|
|
|
|
#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];}
|
|
#define VectorClear(a) {a[0]=vec3_origin[0];a[1]=vec3_origin[1];a[2]=vec3_origin[2];}
|
|
#define VectorNegate(a,b) {b[0]=-a[0];b[1]=-a[1];b[2]=-a[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 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);
|
|
void MatrixAffineInverse (matrix_4x4 m, matrix_4x4 result); // <AWE> added prototype.
|
|
void Mat_Mul_1x4_4x4 (matrix_1x4 a, matrix_4x4 b,matrix_1x4 result); // <AWE> added prototype.
|
|
void RotatePointAroundVector (vec3_t dst, const vec3_t dir, const vec3_t point, float degrees); // <AWE> added prototype.
|
|
|
|
//XYZ added
|
|
#define RAD2DEG( a ) ( ( (a) * 180.0f ) / M_PI )
|
|
#define DEG2RAD( a ) ( ( (a) * M_PI ) / 180.0F )
|
|
|
|
#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)))
|