/usr/include/blitz/tvcross.h is in libblitz0-dev 1:0.10-1ubuntu1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | // -*- C++ -*-
/***************************************************************************
* blitz/tvcross.h Cross product of TinyVector<N,3>'s
*
* $Id$
*
* Copyright (C) 1997-2011 Todd Veldhuizen <tveldhui@acm.org>
*
* This file is a part of Blitz.
*
* Blitz is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* Blitz 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Blitz. If not, see <http://www.gnu.org/licenses/>.
*
* Suggestions: blitz-devel@lists.sourceforge.net
* Bugs: blitz-support@lists.sourceforge.net
*
* For more information, please see the Blitz++ Home Page:
* https://sourceforge.net/projects/blitz/
*
***************************************************************************/
#ifndef BZ_TVCROSS_H
#define BZ_TVCROSS_H
#ifndef BZ_TINYVEC_H
#error <blitz/tvcross.h> must be included via <blitz/tinyvec.h>
#endif
BZ_NAMESPACE(blitz)
/*
* cross product.
*
* NEEDS_WORK: - cross product of two different vector types
* - cross product involving expressions
*/
template<typename T_numtype>
TinyVector<T_numtype,3> cross(const TinyVector<T_numtype,3>& x,
const TinyVector<T_numtype,3>& y)
{
return TinyVector<T_numtype,3>(x[1]*y[2] - y[1]*x[2],
y[0]*x[2] - x[0]*y[2], x[0]*y[1] - y[0]*x[1]);
}
BZ_NAMESPACE_END
#endif // BZ_TVCROSS_H
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