mirror of
https://github.com/cosmo-sims/monofonIC.git
synced 2024-09-19 17:03:45 +02:00
98 lines
No EOL
2.4 KiB
C++
98 lines
No EOL
2.4 KiB
C++
#include <gsl/gsl_math.h>
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#include <gsl/gsl_eigen.h>
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#include <vec3.hh>
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template<typename T>
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class mat3s{
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protected:
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std::array<T,9> data_;
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gsl_matrix_view m_;
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gsl_vector *eval_;
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gsl_matrix *evec_;
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gsl_eigen_symmv_workspace * wsp_;
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void init_gsl(){
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m_ = gsl_matrix_view_array (&data_[0], 3, 3);
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eval_ = gsl_vector_alloc (3);
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evec_ = gsl_matrix_alloc (3, 3);
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wsp_ = gsl_eigen_symmv_alloc (3);
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}
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void free_gsl(){
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gsl_eigen_symmv_free (wsp_);
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gsl_vector_free (eval_);
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gsl_matrix_free (evec_);
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}
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public:
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mat3s(){
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this->init_gsl();
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}
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//! copy constructor
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mat3s( const mat3s<T> &m)
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: data_(m.data_){
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this->init_gsl();
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}
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//! move constructor
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mat3s( mat3s<T> &&m)
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: data_(std::move(m.data_)){
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this->init_gsl();
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}
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//! construct vec3 from initializer list
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template<typename ...E>
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mat3s(E&&...e)
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: data_{{std::forward<E>(e)...}}{
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// resort into symmetrix matrix
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data_[8] = data_[5];
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data_[7] = data_[4];
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data_[6] = data_[2];
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data_[5] = data_[4];
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data_[4] = data_[3];
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data_[3] = data_[1];
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this->init_gsl();
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}
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mat3s<T>& operator=(const mat3s<T>& m){
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data_ = m.data_;
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return *this;
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}
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mat3s<T>& operator=(const mat3s<T>&& m){
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data_ = std::move(m.data_);
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return *this;
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}
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//! bracket index access to vector components
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T &operator[](size_t i){ return data_[i];}
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//! const bracket index access to vector components
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const T &operator[](size_t i) const { return data_[i]; }
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//! matrix 2d index access
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T &operator()(size_t i, size_t j){ return data_[3*i+j]; }
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//! const matrix 2d index access
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const T &operator()(size_t i, size_t j) const { return data_[3*i+j]; }
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//! destructor
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~mat3s(){
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this->free_gsl();
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}
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void eigen( vec3<T>& evals, vec3<T>& evec1, vec3<T>& evec2, vec3<T>& evec3 ){
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gsl_eigen_symmv (&m_.matrix, eval_, evec_, wsp_);
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gsl_eigen_symmv_sort (eval_, evec_, GSL_EIGEN_SORT_VAL_ASC);
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for( int i=0; i<3; ++i ){
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evals[i] = gsl_vector_get( eval_, i );
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evec1[i] = gsl_matrix_get( evec_, i, 0 );
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evec2[i] = gsl_matrix_get( evec_, i, 1 );
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evec3[i] = gsl_matrix_get( evec_, i, 2 );
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}
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}
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}; |