37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
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#include "random_search.h"
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#include <iostream>
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#include <cassert>
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template <
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typename Scalar,
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typename DerivedX,
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typename DerivedLB,
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typename DerivedUB>
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IGL_INLINE Scalar igl::random_search(
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const std::function< Scalar (DerivedX &) > f,
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const Eigen::MatrixBase<DerivedLB> & LB,
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const Eigen::MatrixBase<DerivedUB> & UB,
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const int iters,
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DerivedX & X)
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{
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Scalar min_f = std::numeric_limits<Scalar>::max();
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const int dim = LB.size();
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assert(UB.size() == dim && "UB should match LB size");
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for(int iter = 0;iter<iters;iter++)
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{
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const DerivedX R = DerivedX::Random(dim).array()*0.5+0.5;
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DerivedX Xr = LB.array() + R.array()*(UB-LB).array();
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const Scalar fr = f(Xr);
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if(fr<min_f)
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{
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min_f = fr;
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X = Xr;
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}
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}
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return min_f;
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}
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#ifdef IGL_STATIC_LIBRARY
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template float igl::random_search<float, Eigen::Matrix<float, 1, -1, 1, 1, -1>, Eigen::Matrix<float, 1, -1, 1, 1, -1>, Eigen::Matrix<float, 1, -1, 1, 1, -1> >(std::function<float (Eigen::Matrix<float, 1, -1, 1, 1, -1>&)>, Eigen::MatrixBase<Eigen::Matrix<float, 1, -1, 1, 1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<float, 1, -1, 1, 1, -1> > const&, int, Eigen::Matrix<float, 1, -1, 1, 1, -1>&);
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#endif
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