boost/qvm/mat_traits_defaults.hpp

0001 #ifndef BOOST_QVM_MAT_TRAITS_DEFAULTS_HPP_INCLUDED
0002 #define BOOST_QVM_MAT_TRAITS_DEFAULTS_HPP_INCLUDED
0003
0004 // Copyright 2008-2022 Emil Dotchevski and Reverge Studios, Inc.
0005
0006 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0007 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0008
0009 #include <boost/qvm/config.hpp>
0010 #include <boost/qvm/assert.hpp>
0011
0012 namespace boost { namespace qvm {
0013
0014 template <class>
0015 struct mat_traits;
0016
0017 namespace
0018 qvm_detail
0019     {
0020     template <int I,int N>
0021     struct
0022     matrix_w
0023         {
0024         template <class A>
0025         static
0026         BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0027         typename mat_traits<A>::scalar_type &
0028         write_element_idx( int r, int c, A & a )
0029             {
0030             return (I/mat_traits<A>::cols)==r && (I%mat_traits<A>::cols)==c?
0031                 mat_traits<A>::template write_element<I/mat_traits<A>::cols,I%mat_traits<A>::cols>(a) :
0032                 matrix_w<I+1,N>::write_element_idx(r,c,a);
0033             }
0034         };
0035
0036     template <int N>
0037     struct
0038     matrix_w<N,N>
0039         {
0040         template <class A>
0041         static
0042         BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL
0043         typename mat_traits<A>::scalar_type &
0044         write_element_idx( int, int, A & a )
0045             {
0046             BOOST_QVM_ASSERT(0);
0047             return mat_traits<A>::template write_element<0,0>(a);
0048             }
0049         };
0050     }
0051
0052 template <class MatType,class ScalarType,int Rows,int Cols>
0053 struct
0054 mat_traits_defaults
0055     {
0056     typedef MatType mat_type;
0057     typedef ScalarType scalar_type;
0058     static int const rows=Rows;
0059     static int const cols=Cols;
0060
0061     template <int Row,int Col>
0062     static
0063     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0064     scalar_type
0065     read_element( mat_type const & x )
0066         {
0067         return mat_traits<mat_type>::template write_element<Row,Col>(const_cast<mat_type &>(x));
0068         }
0069
0070     static
0071     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0072     scalar_type
0073     read_element_idx( int r, int c, mat_type const & x )
0074         {
0075         return mat_traits<mat_type>::write_element_idx(r,c,const_cast<mat_type &>(x));
0076         }
0077
0078     protected:
0079
0080     static
0081     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL
0082     scalar_type &
0083     write_element_idx( int r, int c, mat_type & m )
0084         {
0085         return qvm_detail::matrix_w<0,mat_traits<mat_type>::rows*mat_traits<mat_type>::cols>::write_element_idx(r,c,m);
0086         }
0087     };
0088
0089 } }
0090
0091 #endif