9d5d7d8021
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@1442 fc73d0e0-1445-4013-8a0c-d673dee63da5
117 lines
4 KiB
C
117 lines
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 vec2_t[2];
|
|
typedef vec_t vec3_t[3];
|
|
typedef vec_t vec4_t[4];
|
|
typedef vec_t vec5_t[5];
|
|
|
|
typedef qbyte byte_vec4_t[4];
|
|
|
|
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
|
|
|
|
struct mplane_s;
|
|
|
|
extern vec3_t vec3_origin;
|
|
extern int nanmask;
|
|
|
|
#define bound(min,num,max) ((num) >= (min) ? ((num) < (max) ? (num) : (max)) : (min))
|
|
|
|
#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]=(a)[1]=(a)[2]=0)
|
|
#define VectorNegate(a,b) ((b)[0]=-(a)[0],(b)[1]=-(a)[1],(b)[2]=-(a)[2])
|
|
#define VectorLength(a) Length(a)
|
|
|
|
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
|
|
vec_t VectorNormalize2 (vec3_t v, vec3_t out);
|
|
void VectorInverse (vec3_t v);
|
|
void VectorScale (vec3_t in, vec_t scale, vec3_t out);
|
|
int Q_log2(int val);
|
|
|
|
float ColorNormalize (vec3_t in, vec3_t out);
|
|
|
|
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 VectorVectors(vec3_t forward, vec3_t right, vec3_t up);
|
|
void AngleVectors (vec3_t angles, vec3_t forward, vec3_t right, vec3_t up);
|
|
int VARGS 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)))
|
|
|
|
//used for crosshair stuff.
|
|
void ML_Project (vec3_t in, vec3_t out, vec3_t viewangles, vec3_t vieworg, float wdivh, float fovy);
|
|
void Matrix3_Multiply (vec3_t *in1, vec3_t *in2, vec3_t *out);
|
|
void Matrix4_Multiply(float *a, float *b, float *out);
|
|
void Matrix4_Transform3(float *matrix, float *vector, float *product);
|
|
void Matrix4_Transform4(float *matrix, float *vector, float *product);
|
|
void Matrix4x4_Invert_Simple (float *out, const float *in1);
|
|
void ML_ModelViewMatrix(float *modelview, vec3_t viewangles, vec3_t vieworg);
|
|
void ML_ProjectionMatrix2(float *proj, float fovx, float fovy);
|
|
void ML_ModelViewMatrixFromAxis(float *modelview, vec3_t pn, vec3_t right, vec3_t up, vec3_t vieworg);
|
|
|
|
|