/* 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; #define DEG2RAD(a) (((a) * M_PI) / 180.0F) #define NANMASK (255 << 23) #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 VectorNegate(a, b) ((b)[0] = -(a)[0], (b)[1] = -(a)[1], (b)[2] = -(a)[2]) #define VectorSet(v, x, y, z) ((v)[0] = (x), (v)[1] = (y), (v)[2] = (z)) #define CrossProduct(v1, v2, x) \ ((x)[0] = (v1)[1] * (v2)[2] - (v1)[2] * (v2)[1], \ (x)[1] = (v1)[2] * (v2)[0] - (v1)[0] * (v2)[2], \ (x)[2] = (v1)[0] * (v2)[1] - (v1)[1] * (v2)[0]) #define VectorSupCompare(v, w, m) \ (_mathlib_temp_float1 = m, \ (v)[0] - (w)[0] > -_mathlib_temp_float1 && (v)[0] - (w)[0] < _mathlib_temp_float1 && \ (v)[1] - (w)[1] > -_mathlib_temp_float1 && (v)[1] - (w)[1] < _mathlib_temp_float1 && \ (v)[2] - (w)[2] > -_mathlib_temp_float1 && (v)[2] - (w)[2] < _mathlib_temp_float1) #define VectorL2Compare(v, w, m) \ (_mathlib_temp_float1 = (m) * (m), \ _mathlib_temp_vec1[0] = (v)[0] - (w)[0], _mathlib_temp_vec1[1] = (v)[1] - (w)[1], _mathlib_temp_vec1[2] = (v)[2] - (w)[2],\ _mathlib_temp_vec1[0] * _mathlib_temp_vec1[0] + \ _mathlib_temp_vec1[1] * _mathlib_temp_vec1[1] + \ _mathlib_temp_vec1[2] * _mathlib_temp_vec1[2] < _mathlib_temp_float1) #define VectorCompare(v, w) ((v)[0] == (w)[0] && (v)[1] == (w)[1] && (v)[2] == (w)[2]) #define VectorMA(a, _f, b, c) \ do { \ _mathlib_temp_float1 = (_f); \ (c)[0] = (a)[0] + _mathlib_temp_float1 * (b)[0]; \ (c)[1] = (a)[1] + _mathlib_temp_float1 * (b)[1]; \ (c)[2] = (a)[2] + _mathlib_temp_float1 * (b)[2]; \ } while(0) #define VectorScale(in, _scale, out) \ do { \ float scale = (_scale); \ (out)[0] = (in)[0] * (scale); (out)[1] = (in)[1] * (scale); (out)[2] = (in)[2] * (scale);\ } while(0) #define anglemod(a) ((360.0 / 65536) * ((int)((a) * (65536 / 360.0)) & 65535)) #define VectorNormalizeFast(_v) \ do { \ _mathlib_temp_float1 = DotProduct((_v), (_v)); \ if (_mathlib_temp_float1) { \ _mathlib_temp_float2 = 0.5f * _mathlib_temp_float1; \ _mathlib_temp_int1 = *((int *)&_mathlib_temp_float1); \ _mathlib_temp_int1 = 0x5f375a86 - (_mathlib_temp_int1 >> 1); \ _mathlib_temp_float1 = *((float *)&_mathlib_temp_int1); \ _mathlib_temp_float1 = _mathlib_temp_float1 * (1.5f - _mathlib_temp_float2 * _mathlib_temp_float1 * _mathlib_temp_float1);\ VectorScale((_v), _mathlib_temp_float1, (_v)); \ } \ } while(0) #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))) #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 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) \ ) void PerpendicularVector (vec3_t dst, const vec3_t src); void VectorVectors (vec3_t forward, vec3_t right, vec3_t up); float VectorLength (vec3_t v); float VectorNormalize (vec3_t v); // returns vector length 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 vectoangles (vec3_t vec, vec3_t ang); 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); void RotatePointAroundVector (vec3_t dst, const vec3_t dir, const vec3_t point, float degrees); extern vec3_t vec3_origin; extern int _mathlib_temp_int1, _mathlib_temp_int2; extern float _mathlib_temp_float1, _mathlib_temp_float2; extern vec3_t _mathlib_temp_vec1;