mirror of
https://github.com/Shpoike/Quakespasm.git
synced 2024-11-14 00:50:38 +00:00
945262b863
removed the inline versions which only handled integers. moved CLAMP macro to common.h. Adjusted all places for the renamed macros. git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@386 af15c1b1-3010-417e-b628-4374ebc0bcbd
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/*
|
|
Copyright (C) 1996-2001 Id Software, Inc.
|
|
Copyright (C) 2002-2009 John Fitzgibbons and others
|
|
Copyright (C) 2007-2008 Kristian Duske
|
|
|
|
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.
|
|
|
|
*/
|
|
|
|
#ifndef __MATHLIB_H
|
|
#define __MATHLIB_H
|
|
|
|
// mathlib.h
|
|
|
|
#include <math.h>
|
|
|
|
#ifndef M_PI
|
|
#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h
|
|
#endif
|
|
|
|
#define M_PI_DIV_180 (M_PI / 180.0) //johnfitz
|
|
|
|
struct mplane_s;
|
|
|
|
extern vec3_t vec3_origin;
|
|
|
|
#define nanmask (255<<23) /* 7F800000 */
|
|
#define IS_NAN(x) (((*(int *) &x) & nanmask) == nanmask)
|
|
|
|
#define Q_rint(x) ((x) > 0 ? (int)((x) + 0.5) : (int)((x) - 0.5)) //johnfitz -- from joequake
|
|
|
|
#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];}
|
|
|
|
//johnfitz -- courtesy of lordhavoc
|
|
// QuakeSpasm: To avoid strict aliasing violations, use a float/int union instead of type punning.
|
|
#define VectorNormalizeFast(_v)\
|
|
{\
|
|
union { float f; int i; } _y, _number;\
|
|
_number.f = DotProduct(_v, _v);\
|
|
if (_number.f != 0.0)\
|
|
{\
|
|
_y.i = 0x5f3759df - (_number.i >> 1);\
|
|
_y.f = _y.f * (1.5f - (_number.f * 0.5f * _y.f * _y.f));\
|
|
VectorScale(_v, _y.f, _v);\
|
|
}\
|
|
}
|
|
|
|
void TurnVector (vec3_t out, const vec3_t forward, const vec3_t side, float angle); //johnfitz
|
|
void VectorAngles (const vec3_t forward, vec3_t angles); //johnfitz
|
|
|
|
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 VectorLength (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)))
|
|
|
|
#endif /* __MATHLIB_H */
|
|
|