Danny Robson
d3f434b523
The coordinate system was unable to support types that prohibited redim or retype operations. Additionally, the `tags' type used for providing named data parameters was unwiedly. We remove much of the dependance on template template parameters in the defined operations and instead define these in terms of a template specialisation of is_coord. The tag types were replaced with direct specialisation of the `store' struct by the primary type, and passing this type through use of the CRTP.
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#include "matrix.hpp"
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using util::matrix;
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///////////////////////////////////////////////////////////////////////////////
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template <std::size_t Rows, std::size_t Cols, typename T>
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T
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util::determinant (const matrix<Rows,Cols,T> &m)
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{
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static_assert (Rows == 2 && Cols == 2);
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return m[0][0] * m[1][1] - m[0][1] * m[1][0];
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}
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template float util::determinant (const matrix<2,2,float>&);
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template double util::determinant (const matrix<2,2,double>&);
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///////////////////////////////////////////////////////////////////////////////
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template <std::size_t Rows, std::size_t Cols, typename T>
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matrix<Rows,Cols,T>
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util::inverse (const matrix<Rows,Cols,T> &m)
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{
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static_assert (Rows == 2 && Cols == 2);
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return matrix<2,2,T> {{
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{ m[1][1], -m[0][1], },
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{ -m[1][0], m[0][0], },
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}} / determinant (m);
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}
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//-----------------------------------------------------------------------------
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template util::matrix<2,2,float> util::inverse (const matrix<2,2,float>&);
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template util::matrix<2,2,double> util::inverse (const matrix<2,2,double>&);
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///////////////////////////////////////////////////////////////////////////////
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template struct util::matrix<2,2,float>;
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template struct util::matrix<2,2,double>;
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