mirror of https://github.com/CGAL/cgal
43 lines
1003 B
C++
43 lines
1003 B
C++
#include <CGAL/Eigen_solver_traits.h>
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#include <CGAL/Eigen_matrix.h>
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typedef CGAL::Eigen_solver_traits<> Eigen_solver;
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typedef Eigen_solver::NT FT;
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typedef Eigen_solver::Matrix Eigen_matrix;
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typedef Eigen_solver::Vector Eigen_vector;
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int main(void)
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{
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srand(static_cast<unsigned int>(time (nullptr)));
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std::size_t degree = 3000;
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std::size_t nb_nonzero_coef = 100;
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Eigen_vector B(degree); // Zero vector
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Eigen_matrix A(degree);
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// Randomly make some coefficients of the matrix non-zero
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for(std::size_t i=0; i<nb_nonzero_coef; ++i)
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{
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int x = rand() % degree;
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int y = rand() % degree;
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FT value = rand() / static_cast<FT>(RAND_MAX);
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A.add_coef(x, y, value);
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A.add_coef(y, x, value);
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}
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Eigen_vector X(degree);
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FT d;
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Eigen_solver solver;
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if(!(solver.linear_solver(A, B, X, d)))
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{
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std::cerr << "Error: linear solver failed" << std::endl;
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return -1;
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}
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std::cerr << "Linear solve succeeded" << std::endl;
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return 0;
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}
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