Added thirdparty: boost library

2026-08-14 03:08:07 +00:00 · 2024-01-06 19:55:56 +02:00
parent bf49f439e1
commit bccd1e7051
15683 changed files with 3239840 additions and 0 deletions
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+#ifndef BOOST_QVM_DETAIL_COFACTOR_IMPL_HPP_INCLUDED
+#define BOOST_QVM_DETAIL_COFACTOR_IMPL_HPP_INCLUDED
+
+// Copyright 2008-2022 Emil Dotchevski and Reverge Studios, Inc.
+
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/qvm/detail/determinant_impl.hpp>
+#include <boost/qvm/mat_traits.hpp>
+#include <boost/qvm/static_assert.hpp>
+
+namespace boost { namespace qvm {
+
+namespace
+qvm_detail
+    {
+    template <class A>
+    BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_OPERATIONS
+    typename deduce_mat<A>::type
+    cofactor_impl( A const & a )
+        {
+        BOOST_QVM_STATIC_ASSERT(mat_traits<A>::rows==mat_traits<A>::cols);
+        int const N=mat_traits<A>::rows;
+        typedef typename mat_traits<A>::scalar_type T;
+        T c[N-1][N-1];
+        typedef typename deduce_mat<A>::type R;
+        R b;
+        for( int j=0; j!=N; ++j )
+            {
+            for( int i=0; i!=N; ++i )
+                {
+                int i1=0;
+                for( int ii=0; ii!=N; ++ii )
+                    {
+                    if( ii==i )
+                        continue;
+                    int j1=0;
+                    for( int jj=0; jj!=N; ++jj )
+                        {
+                        if( jj==j )
+                            continue;
+                        c[i1][j1] = mat_traits<A>::read_element_idx(ii,jj,a);
+                        ++j1;
+                        }
+                    ++i1;
+                    }
+                T det = determinant_impl(c);
+                if( (i+j)&1 )
+                    det=-det;
+                write_mat_element_idx(i,j,b,det);
+                }
+            }
+        return b;
+        }
+    }
+
+} }
+
+#endif