65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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* Copyright (C) 2004 Christopher John Purnell
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* cjp@lost.org.uk
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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. See the
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* GNU General Public License for more details.
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*
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <math.h>
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#include "al_vector.h"
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ALfloat _alVectorMagnitude(ALfloat *v)
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{
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return sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
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}
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ALvoid _alVectorNormalize(ALfloat *d, ALfloat *s)
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{
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ALfloat mag;
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if (!(mag = _alVectorMagnitude(s)))
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{
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d[0] = 0.0f;
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d[1] = 0.0f;
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d[2] = 0.0f;
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}
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else
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{
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d[0] = s[0] / mag;
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d[1] = s[1] / mag;
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d[2] = s[2] / mag;
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}
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}
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ALvoid _alVectorCrossProduct(ALfloat *d, ALfloat *v1, ALfloat *v2)
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{
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d[0] = v1[1] * v2[2] - v1[2] * v2[1];
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d[1] = v1[2] * v2[0] - v1[0] * v2[2];
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d[2] = v1[0] * v2[1] - v1[1] * v2[0];
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}
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ALfloat _alVectorDotProduct(ALfloat *v1, ALfloat *v2)
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{
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return (v1[0] * v2[0] + v1[1] * v2[1] + v1[2] * v2[2]);
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}
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ALvoid _alVectorMatrix(ALfloat *d, ALfloat *s, ALfloat *m)
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{
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d[0] = s[0] * m[0] + s[1] * m[3] + s[2] * m[6];
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d[1] = s[0] * m[1] + s[1] * m[4] + s[2] * m[7];
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d[2] = s[0] * m[2] + s[1] * m[5] + s[2] * m[8];
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}
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