URL: https://svn.lrde.epita.fr/svn/oln/trunk/milena ChangeLog: 2007-09-28 Simon Nivault &lt;simon.nivault(a)lrde.epita.fr&gt; Add homogen vector. * mln/core/h_vec.hh: New. * mln/core/point.hh: Know be casted as homogen vector. * tests/h_vec.cc: New. --- mln/core/h_vec.hh | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ mln/core/point.hh | 10 ++++++ tests/h_vec.cc | 62 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 155 insertions(+) Index: trunk/milena/tests/h_vec.cc =================================================================== --- trunk/milena/tests/h_vec.cc (revision 0) +++ trunk/milena/tests/h_vec.cc (revision 1190) @@ -0,0 +1,62 @@ +// Copyright (C) 2007 EPITA Research and Development Laboratory +// +// This file is part of the Olena Library. This library is free +// software; you can redistribute it and/or modify it under the terms +// of the GNU General Public License version 2 as published by the +// Free Software Foundation. +// +// This library 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 this library; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02111-1307, USA. +// +// As a special exception, you may use this file as part of a free +// software library without restriction. Specifically, if other files +// instantiate templates or use macros or inline functions from this +// file, or you compile this file and link it with other files to +// produce an executable, this file does not by itself cause the +// resulting executable to be covered by the GNU General Public +// License. This exception does not however invalidate any other +// reasons why the executable file might be covered by the GNU General +// Public License. + +/*! \file tests/h_vec.cc + * + * \brief Tests on mln::h_vec. + */ + +#include <mln/core/h_vec.hh> +#include <mln/core/point3d.hh> + +using namespace mln; + + +void run_in_3d(const metal::vec<3, int>&) +{ +} + +void run_in_3d_h(const h_vec<3, int>&) +{ +} + + +int main() +{ + + metal::vec<3, int> x; + h_vec<3, int> w = x; + + typedef h_vec<3, int> p3d; + p3d p; + run_in_3d(p); + + point3d k; + run_in_3d(k); + run_in_3d_h(k); + +} Index: trunk/milena/mln/core/point.hh =================================================================== --- trunk/milena/mln/core/point.hh (revision 1189) +++ trunk/milena/mln/core/point.hh (revision 1190) @@ -107,6 +107,9 @@ /// Hook to coordinates. operator metal::vec<M::dim, C>() const; + /// Hook to homogene coordinate. + operator h_vec<M::dim, C>() const; + protected: metal::vec<M::dim, C> coord_; }; @@ -172,6 +175,13 @@ return coord_; } + template <typename M, typename C> + point_<M,C>::operator h_vec<M::dim, C>() const + { + return coord_; + } + + # endif // ! MLN_INCLUDE_ONLY Index: trunk/milena/mln/core/h_vec.hh =================================================================== --- trunk/milena/mln/core/h_vec.hh (revision 0) +++ trunk/milena/mln/core/h_vec.hh (revision 1190) @@ -0,0 +1,83 @@ +// Copyright (C) 2007 EPITA Research and Development Laboratory +// +// This file is part of the Olena Library. This library is free +// software; you can redistribute it and/or modify it under the terms +// of the GNU General Public License version 2 as published by the +// Free Software Foundation. +// +// This library 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 this library; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02111-1307, USA. +// +// As a special exception, you may use this file as part of a free +// software library without restriction. Specifically, if other files +// instantiate templates or use macros or inline functions from this +// file, or you compile this file and link it with other files to +// produce an executable, this file does not by itself cause the +// resulting executable to be covered by the GNU General Public +// License. This exception does not however invalidate any other +// reasons why the executable file might be covered by the GNU General +// Public License. + +#ifndef MLN_CORE_H_VEC_HH +# define MLN_CORE_H_VEC_HH + +/*! \file mln/core/h_vec.hh + * + * \brief Definition of the mln::h_vec alias and of its + * construction routine. + */ + +# include <mln/metal/vec.hh> + + +namespace mln +{ + + + template <unsigned dim, typename T> + struct h_vec : public metal::vec<dim + 1, T> + { + h_vec() + : metal::vec<dim + 1, T>(make::vec<dim + 1, T>(0)) + { + this->data_[dim] = 1; + } + + h_vec(const metal::vec<dim, T>& x); + + operator metal::vec<dim, T>() const; + }; + +# ifndef MLN_INCLUDE_ONLY + + template <unsigned dim, typename T> + h_vec<dim,T>::h_vec(const metal::vec<dim, T>& x) + { + for (unsigned i = 0; i < dim; ++i) + this->data_[i] = x[i]; + this->data_[dim] = 1; + } + + template <unsigned dim, typename T> + h_vec<dim,T>::operator metal::vec<dim,T>() const + { + metal::vec<dim,T> x; + for (unsigned i = 0; i < dim; ++i) + x[i] = this->data_[i] / this->data_[dim]; + return x; + } + +# endif // ! MLN_INCLUDE_ONLY + +} // end of namespace mln + + + +#endif // ! MLN_CORE_H_VEC_HH