mirror of https://github.com/GNOME/gimp.git
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
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/* vector2d
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* Copyright (C) 1998 Jay Cox <jaycox@earthlink.net>
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "vector2d.h"
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#include <math.h>
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double
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vector2d_dot_product (vector2d *v1, vector2d *v2)
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{
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return ((v1->x * v2->x) + (v1->y * v2->y));
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}
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double
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vector2d_magnitude (vector2d *v)
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{
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return (sqrt((v->x*v->x) + (v->y*v->y)));
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}
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void
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vector2d_set (vector2d *v, double x, double y)
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{
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v->x = x; v->y = y;
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}
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