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 2008-2024 Emil Dotchevski and Reverge Studios, Inc.
0005 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0006 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0007
0008 #include <boost/qvm/config.hpp>
0009 #include <boost/qvm/assert.hpp>
0010
0011 namespace boost { namespace qvm {
0012
0013 template <class>
0014 struct mat_traits;
0015
0016 namespace
0017 qvm_detail
0018     {
0019     template <int I,int N>
0020     struct
0021     matrix_w
0022         {
0023         template <class A>
0024         static
0025         BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0026         typename mat_traits<A>::scalar_type &
0027         write_element_idx( int r, int c, A & a )
0028             {
0029             return (I/mat_traits<A>::cols)==r && (I%mat_traits<A>::cols)==c?
0030                 mat_traits<A>::template write_element<I/mat_traits<A>::cols,I%mat_traits<A>::cols>(a) :
0031                 matrix_w<I+1,N>::write_element_idx(r,c,a);
0032             }
0033         };
0034
0035     template <int N>
0036     struct
0037     matrix_w<N,N>
0038         {
0039         template <class A>
0040         static
0041         BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL
0042         typename mat_traits<A>::scalar_type &
0043         write_element_idx( int, int, A & a )
0044             {
0045             BOOST_QVM_ASSERT(0);
0046             return mat_traits<A>::template write_element<0,0>(a);
0047             }
0048         };
0049     }
0050
0051 template <class MatType,class ScalarType,int Rows,int Cols>
0052 struct
0053 mat_traits_defaults
0054     {
0055     typedef MatType mat_type;
0056     typedef ScalarType scalar_type;
0057     static int const rows=Rows;
0058     static int const cols=Cols;
0059
0060     template <int Row,int Col>
0061     static
0062     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0063     scalar_type
0064     read_element( mat_type const & x )
0065         {
0066         return mat_traits<mat_type>::template write_element<Row,Col>(const_cast<mat_type &>(x));
0067         }
0068
0069     static
0070     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0071     scalar_type
0072     read_element_idx( int r, int c, mat_type const & x )
0073         {
0074         return mat_traits<mat_type>::write_element_idx(r,c,const_cast<mat_type &>(x));
0075         }
0076
0077     protected:
0078
0079     static
0080     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL
0081     scalar_type &
0082     write_element_idx( int r, int c, mat_type & m )
0083         {
0084         return qvm_detail::matrix_w<0,mat_traits<mat_type>::rows*mat_traits<mat_type>::cols>::write_element_idx(r,c,m);
0085         }
0086     };
0087
0088 } }
0089
0090 #endif