46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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/*
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* Copyright 2011-2014 hasufell
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*
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* This file is part of a hasufell project.
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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 version 2 of the License only.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "err.h"
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#include "types.h"
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#include <stdbool.h>
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#include <stdlib.h>
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/**
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* Calculate the vector product of a and b
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* and store it in c.
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*
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* @param a vector
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* @param b vector
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* @param c vector [out]
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* @return true/false for success/failure
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*/
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bool vector_product(vector *a, vector *b, vector *c)
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{
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if (!a || !b)
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return false;
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c->x = a->y * b->z - a->z * b->y;
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c->y = a->z * b->x - a->x * b->z;
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c->z = a->x * b->y - a->y * b->x;
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return true;
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}
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