1 // Boost.Geometry (aka GGL, Generic Geometry Library) 2 3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands. 4 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France. 5 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK. 6 7 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library 8 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. 9 10 // Use, modification and distribution is subject to the Boost Software License, 11 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 12 // http://www.boost.org/LICENSE_1_0.txt) 13 14 #ifndef BOOST_GEOMETRY_STRATEGIES_TRANSFORM_INVERSE_TRANSFORMER_HPP 15 #define BOOST_GEOMETRY_STRATEGIES_TRANSFORM_INVERSE_TRANSFORMER_HPP 16 17 #include <boost/qvm/mat.hpp> 18 #include <boost/qvm/mat_operations.hpp> 19 20 #include <boost/geometry/strategies/transform/matrix_transformers.hpp> 21 22 23 namespace boost { namespace geometry 24 { 25 26 namespace strategy { namespace transform 27 { 28 29 /*! 30 \brief Transformation strategy to do an inverse transformation in a Cartesian coordinate system 31 \ingroup strategies 32 */ 33 template 34 < 35 typename CalculationType, 36 std::size_t Dimension1, 37 std::size_t Dimension2 38 > 39 class inverse_transformer 40 : public matrix_transformer<CalculationType, Dimension1, Dimension2> 41 { 42 public : 43 template <typename Transformer> inverse_transformer(Transformer const & input)44 inline inverse_transformer(Transformer const& input) 45 { 46 this->m_matrix = boost::qvm::inverse(input.matrix()); 47 } 48 49 }; 50 51 52 }} // namespace strategy::transform 53 54 55 }} // namespace boost::geometry 56 57 #endif // BOOST_GEOMETRY_STRATEGIES_TRANSFORM_INVERSE_TRANSFORMER_HPP 58