From 952c5c128f9efaea89d41d882c4ea3ade7df4591 Mon Sep 17 00:00:00 2001 From: zakk Date: Fri, 26 Aug 2005 04:48:05 +0000 Subject: Itsa me, quake3io! git-svn-id: svn://svn.icculus.org/quake3/trunk@2 edf5b092-35ff-0310-97b2-ce42778d08ea --- code/bspc/l_math.c | 289 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 289 insertions(+) create mode 100755 code/bspc/l_math.c (limited to 'code/bspc/l_math.c') diff --git a/code/bspc/l_math.c b/code/bspc/l_math.c new file mode 100755 index 0000000..caf3419 --- /dev/null +++ b/code/bspc/l_math.c @@ -0,0 +1,289 @@ +/* +=========================================================================== +Copyright (C) 1999-2005 Id Software, Inc. + +This file is part of Quake III Arena source code. + +Quake III Arena source code 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. + +Quake III Arena source code 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 Foobar; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +=========================================================================== +*/ +// mathlib.c -- math primitives + +#include "l_cmd.h" +#include "l_math.h" + +vec3_t vec3_origin = {0,0,0}; + +void AngleVectors (const vec3_t angles, vec3_t forward, vec3_t right, vec3_t up) +{ + float angle; + static float sr, sp, sy, cr, cp, cy; + // static to help MS compiler fp bugs + + angle = angles[YAW] * (M_PI*2 / 360); + sy = sin(angle); + cy = cos(angle); + angle = angles[PITCH] * (M_PI*2 / 360); + sp = sin(angle); + cp = cos(angle); + angle = angles[ROLL] * (M_PI*2 / 360); + sr = sin(angle); + cr = cos(angle); + + if (forward) + { + forward[0] = cp*cy; + forward[1] = cp*sy; + forward[2] = -sp; + } + if (right) + { + right[0] = (-1*sr*sp*cy+-1*cr*-sy); + right[1] = (-1*sr*sp*sy+-1*cr*cy); + right[2] = -1*sr*cp; + } + if (up) + { + up[0] = (cr*sp*cy+-sr*-sy); + up[1] = (cr*sp*sy+-sr*cy); + up[2] = cr*cp; + } +} + +/* +================= +RadiusFromBounds +================= +*/ +float RadiusFromBounds( const vec3_t mins, const vec3_t maxs ) { + int i; + vec3_t corner; + float a, b; + + for (i=0 ; i<3 ; i++) { + a = fabs( mins[i] ); + b = fabs( maxs[i] ); + corner[i] = a > b ? a : b; + } + + return VectorLength (corner); +} + +/* +================ +R_ConcatRotations +================ +*/ +void R_ConcatRotations (float in1[3][3], float in2[3][3], float out[3][3]) +{ + out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] + + in1[0][2] * in2[2][0]; + out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] + + in1[0][2] * in2[2][1]; + out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] + + in1[0][2] * in2[2][2]; + out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] + + in1[1][2] * in2[2][0]; + out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] + + in1[1][2] * in2[2][1]; + out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] + + in1[1][2] * in2[2][2]; + out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] + + in1[2][2] * in2[2][0]; + out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] + + in1[2][2] * in2[2][1]; + out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] + + in1[2][2] * in2[2][2]; +} + +void AxisClear( vec3_t axis[3] ) { + axis[0][0] = 1; + axis[0][1] = 0; + axis[0][2] = 0; + axis[1][0] = 0; + axis[1][1] = 1; + axis[1][2] = 0; + axis[2][0] = 0; + axis[2][1] = 0; + axis[2][2] = 1; +} + +float VectorLengthSquared(vec3_t v) { + return DotProduct(v, v); +} + +double VectorLength(vec3_t v) +{ + int i; + double length; + + length = 0; + for (i=0 ; i< 3 ; i++) + length += v[i]*v[i]; + length = sqrt (length); // FIXME + + return length; +} + +qboolean VectorCompare (vec3_t v1, vec3_t v2) +{ + int i; + + for (i=0 ; i<3 ; i++) + if (fabs(v1[i]-v2[i]) > EQUAL_EPSILON) + return false; + + return true; +} + +vec_t Q_rint (vec_t in) +{ + return floor(in + 0.5); +} + +void CrossProduct (const vec3_t v1, const vec3_t v2, vec3_t cross) +{ + cross[0] = v1[1]*v2[2] - v1[2]*v2[1]; + cross[1] = v1[2]*v2[0] - v1[0]*v2[2]; + cross[2] = v1[0]*v2[1] - v1[1]*v2[0]; +} + +void _VectorMA (vec3_t va, double scale, vec3_t vb, vec3_t vc) +{ + vc[0] = va[0] + scale*vb[0]; + vc[1] = va[1] + scale*vb[1]; + vc[2] = va[2] + scale*vb[2]; +} + +vec_t _DotProduct (vec3_t v1, vec3_t v2) +{ + return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2]; +} + +void _VectorSubtract (vec3_t va, vec3_t vb, vec3_t out) +{ + out[0] = va[0]-vb[0]; + out[1] = va[1]-vb[1]; + out[2] = va[2]-vb[2]; +} + +void _VectorAdd (vec3_t va, vec3_t vb, vec3_t out) +{ + out[0] = va[0]+vb[0]; + out[1] = va[1]+vb[1]; + out[2] = va[2]+vb[2]; +} + +void _VectorCopy (vec3_t in, vec3_t out) +{ + out[0] = in[0]; + out[1] = in[1]; + out[2] = in[2]; +} + +void _VectorScale (vec3_t v, vec_t scale, vec3_t out) +{ + out[0] = v[0] * scale; + out[1] = v[1] * scale; + out[2] = v[2] * scale; +} + +vec_t VectorNormalize(vec3_t inout) +{ + vec_t length, ilength; + + length = sqrt (inout[0]*inout[0] + inout[1]*inout[1] + inout[2]*inout[2]); + if (length == 0) + { + VectorClear (inout); + return 0; + } + + ilength = 1.0/length; + inout[0] = inout[0]*ilength; + inout[1] = inout[1]*ilength; + inout[2] = inout[2]*ilength; + + return length; +} + +vec_t VectorNormalize2(const vec3_t in, vec3_t out) +{ + vec_t length, ilength; + + length = sqrt (in[0]*in[0] + in[1]*in[1] + in[2]*in[2]); + if (length == 0) + { + VectorClear (out); + return 0; + } + + ilength = 1.0/length; + out[0] = in[0]*ilength; + out[1] = in[1]*ilength; + out[2] = in[2]*ilength; + + return length; +} + +vec_t ColorNormalize (vec3_t in, vec3_t out) +{ + float max, scale; + + max = in[0]; + if (in[1] > max) + max = in[1]; + if (in[2] > max) + max = in[2]; + + if (max == 0) + return 0; + + scale = 1.0 / max; + + VectorScale (in, scale, out); + + return max; +} + + + +void VectorInverse (vec3_t v) +{ + v[0] = -v[0]; + v[1] = -v[1]; + v[2] = -v[2]; +} + +void ClearBounds(vec3_t mins, vec3_t maxs) +{ + mins[0] = mins[1] = mins[2] = 99999; + maxs[0] = maxs[1] = maxs[2] = -99999; +} + +void AddPointToBounds(const vec3_t v, vec3_t mins, vec3_t maxs) +{ + int i; + vec_t val; + + for (i=0 ; i<3 ; i++) + { + val = v[i]; + if (val < mins[i]) + mins[i] = val; + if (val > maxs[i]) + maxs[i] = val; + } +} -- cgit v1.2.3