mirror of
https://github.com/nzp-team/glquake.git
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131 lines
4.8 KiB
C
131 lines
4.8 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// mathlib.h
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typedef float vec_t;
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typedef vec_t vec3_t[3];
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typedef vec_t vec5_t[5];
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typedef vec_t vec2_t[2];
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typedef int fixed4_t;
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typedef int fixed8_t;
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typedef int fixed16_t;
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#ifndef M_PI
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#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h
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#endif
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struct mplane_s;
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extern vec3_t vec3_origin;
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extern int nanmask;
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#define IS_NAN(x) (((*(int *)&x)&nanmask)==nanmask)
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#define Q_rint(x) ((x) > 0 ? (int)((x) + 0.5) : (int)((x) - 0.5)) //johnfitz -- from joequake
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#define DotProduct(x,y) (x[0]*y[0]+x[1]*y[1]+x[2]*y[2])
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#define DoublePrecisionDotProduct(x,y) ((double)x[0]*y[0]+(double)x[1]*y[1]+(double)x[2]*y[2])
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#define VectorSubtract(a,b,c) {c[0]=a[0]-b[0];c[1]=a[1]-b[1];c[2]=a[2]-b[2];}
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#define VectorAdd(a,b,c) {c[0]=a[0]+b[0];c[1]=a[1]+b[1];c[2]=a[2]+b[2];}
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#define VectorCopy(a,b) {b[0]=a[0];b[1]=a[1];b[2]=a[2];}
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#define VectorClear(a) ((a)[0] = (a)[1] = (a)[2] = 0)
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#define VectorSet(v, x, y, z) ((v)[0] = (x), (v)[1] = (y), (v)[2] = (z))
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#define VectorNegate(a, b) ((b)[0] = -(a)[0], (b)[1] = -(a)[1], (b)[2] = -(a)[2])
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#define DEG2RAD( a ) ( a * M_PI ) / 180.0F
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#define VectorNormalizeFast( v ){float ilength = (float)rsqrt(DotProduct(v,v));v[0] *= ilength;v[1] *= ilength;v[2] *= ilength; }
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#define VectorDistanceSquared(a,b)((a[0]-b[0])*(a[0]-b[0])+(a[1]-b[1])*(a[1]-b[1])+(a[2]-b[2])*(a[2]-b[2]))
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void VectorMA (vec3_t veca, float scale, vec3_t vecb, vec3_t vecc);
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vec_t _DotProduct (vec3_t v1, vec3_t v2);
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void _VectorSubtract (vec3_t veca, vec3_t vecb, vec3_t out);
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void _VectorAdd (vec3_t veca, vec3_t vecb, vec3_t out);
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void _VectorCopy (vec3_t in, vec3_t out);
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void vectoangles (vec3_t vec, vec3_t ang);
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#define VectorInterpolate(v1, _frac, v2, v) \
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do { \
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_mathlib_temp_float1 = _frac; \
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\
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(v)[0] = (v1)[0] + _mathlib_temp_float1 * ((v2)[0] - (v1)[0]);\
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(v)[1] = (v1)[1] + _mathlib_temp_float1 * ((v2)[1] - (v1)[1]);\
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(v)[2] = (v1)[2] + _mathlib_temp_float1 * ((v2)[2] - (v1)[2]);\
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} while(0)
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int VectorCompare (vec3_t v1, vec3_t v2);
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#define Length(v) (sqrtf(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]))
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void CrossProduct (vec3_t v1, vec3_t v2, vec3_t cross);
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float VectorLength (vec3_t v);
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float VecLength2(vec3_t v1, vec3_t v2);
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float VectorNormalize (vec3_t v); // returns vector length
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void VectorInverse (vec3_t v);
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void VectorScale (vec3_t in, vec_t scale, vec3_t out);
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int Q_log2(int val);
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void R_ConcatRotations (float in1[3][3], float in2[3][3], float out[3][3]);
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void R_ConcatTransforms (float in1[3][4], float in2[3][4], float out[3][4]);
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void FloorDivMod (double numer, double denom, int *quotient,
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int *rem);
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fixed16_t Invert24To16(fixed16_t val);
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int GreatestCommonDivisor (int i1, int i2);
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void AngleVectors (vec3_t angles, vec3_t forward, vec3_t right, vec3_t up);
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int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct mplane_s *plane);
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float anglemod(float a);
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extern int _mathlib_temp_int1, _mathlib_temp_int2, _mathlib_temp_int3;
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extern float _mathlib_temp_float1, _mathlib_temp_float2, _mathlib_temp_float3;
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extern vec3_t _mathlib_temp_vec1, _mathlib_temp_vec2, _mathlib_temp_vec3;
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#define VectorL2Compare(v, w, m) \
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(_mathlib_temp_float1 = (m) * (m), \
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_mathlib_temp_vec1[0] = (v)[0] - (w)[0], _mathlib_temp_vec1[1] = (v)[1] - (w)[1], _mathlib_temp_vec1[2] = (v)[2] - (w)[2],\
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_mathlib_temp_vec1[0] * _mathlib_temp_vec1[0] + \
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_mathlib_temp_vec1[1] * _mathlib_temp_vec1[1] + \
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_mathlib_temp_vec1[2] * _mathlib_temp_vec1[2] < _mathlib_temp_float1)
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#define VectorSupCompare(v, w, m) \
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(_mathlib_temp_float1 = m, \
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(v)[0] - (w)[0] > -_mathlib_temp_float1 && (v)[0] - (w)[0] < _mathlib_temp_float1 && \
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(v)[1] - (w)[1] > -_mathlib_temp_float1 && (v)[1] - (w)[1] < _mathlib_temp_float1 && \
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(v)[2] - (w)[2] > -_mathlib_temp_float1 && (v)[2] - (w)[2] < _mathlib_temp_float1)
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#define BOX_ON_PLANE_SIDE(emins, emaxs, p) \
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(((p)->type < 3)? \
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( \
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((p)->dist <= (emins)[(p)->type])? \
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1 \
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: \
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( \
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((p)->dist >= (emaxs)[(p)->type])?\
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2 \
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: \
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3 \
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) \
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) \
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: \
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BoxOnPlaneSide( (emins), (emaxs), (p)))
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float rsqrt( float number );
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