/* 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; #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];} void VectorMA (vec3_t veca, float scale, vec3_t vecb, vec3_t vecc); #define CLAMP(min, x, max) ((x) < (min) ? (min) : (x) > (max) ? (max) : (x)) //johnfitz 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); #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))) // 2001-11-15 DarkPlaces general builtin functions by LordHavoc start #define bound(min,num,max) (num >= min ? (num < max ? num : max) : min) int _mathlib_temp_int1, _mathlib_temp_int2, _mathlib_temp_int3; float _mathlib_temp_float1, _mathlib_temp_float2, _mathlib_temp_float3; vec3_t _mathlib_temp_vec1, _mathlib_temp_vec2, _mathlib_temp_vec3; #if !defined _WIN32 || defined __MINGW32__ #define min(val1,val2) (val2 < val1 ? val2 : val1) #define max(val1,val2) (val2 > val1 ? val2 : val1) #endif // 2001-11-15 DarkPlaces general builtin functions by LordHavoc end void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees ); // 2001-12-10 Reduced compiler warnings by Jeff Ford #define VectorScalarMult(a,b,c) {c[0]=a[0]*b;c[1]=a[1]*b;c[2]=a[2]*b;} // 2001-12-15 Oriented sprites fix by Atomizer //static fixed_t FixedMul(fixed_t a, fixed_t b) //{ // return (fixed_t)((long long) a*b >> FRACBITS); //} #define MIN(x, y) ((x) <= (y) ? (x) : (y)) #define MAX(x, y) ((x) >= (y) ? (x) : (y)) #define MID(min, val, max) MAX(min, MIN(val, max)) #define VectorMAMAM(scale1, b1, scale2, b2, scale3, b3, c) ((c)[0] = (scale1) * (b1)[0] + (scale2) * (b2)[0] + (scale3) * (b3)[0],(c)[1] = (scale1) * (b1)[1] + (scale2) * (b2)[1] + (scale3) * (b3)[1],(c)[2] = (scale1) * (b1)[2] + (scale2) * (b2)[2] + (scale3) * (b3)[2]) #define DEG2RAD( a ) ( a * M_PI ) / 180.0F #define VectorClear(a) ((a)[0]=(a)[1]=(a)[2]=0) #define VectorInterpolate(v1, _frac, v2, v) \ do { \ _mathlib_temp_float1 = _frac; \ \ (v)[0] = (v1)[0] + _mathlib_temp_float1 * ((v2)[0] - (v1)[0]); \ (v)[1] = (v1)[1] + _mathlib_temp_float1 * ((v2)[1] - (v1)[1]); \ (v)[2] = (v1)[2] + _mathlib_temp_float1 * ((v2)[2] - (v1)[2]); \ } while (0); #define AngleInterpolate(v1, _frac, v2, v) \ do { \ _mathlib_temp_float1 = _frac; \ VectorSubtract((v2), (v1), _mathlib_temp_vec1); \ \ if (_mathlib_temp_vec1[0] > 180) _mathlib_temp_vec1[0] -= 360; \ else if (_mathlib_temp_vec1[0] < -180) _mathlib_temp_vec1[0] += 360; \ if (_mathlib_temp_vec1[1] > 180) _mathlib_temp_vec1[1] -= 360; \ else if (_mathlib_temp_vec1[1] < -180) _mathlib_temp_vec1[1] += 360; \ if (_mathlib_temp_vec1[2] > 180) _mathlib_temp_vec1[2] -= 360; \ else if (_mathlib_temp_vec1[2] < -180) _mathlib_temp_vec1[2] += 360; \ \ (v)[0] = (v1)[0] + _mathlib_temp_float1 * _mathlib_temp_vec1[0]; \ (v)[1] = (v1)[1] + _mathlib_temp_float1 * _mathlib_temp_vec1[1]; \ (v)[2] = (v1)[2] + _mathlib_temp_float1 * _mathlib_temp_vec1[2]; \ } while (0); #define FloatInterpolate(f1, _frac, f2) \ (_mathlib_temp_float1 = _frac, \ (f1) + _mathlib_temp_float1 * ((f2) - (f1))) #define PlaneDist(point, plane) ( \ (plane)->type < 3 ? (point)[(plane)->type] : DotProduct((point), (plane)->normal) \ ) #define PlaneDiff(point, plane) ( \ (((plane)->type < 3) ? (point)[(plane)->type] - (plane)->dist: DotProduct((point), (plane)->normal) - (plane)->dist) \ ) #define Crap(x,y) (abs(x[0]*y[0])+abs(x[1]*y[1])+abs(x[2]*y[2]))