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39 lines
1.5 KiB
39 lines
1.5 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#include "increment_ulp.h"
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#include <cmath>
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#include <limits>
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// see "Robust BVH Ray Traversal" by Thiago Ize, section 3:
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// for why we need this
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template <typename Derived>
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IGL_INLINE void igl::increment_ulp(
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Eigen::MatrixBase<Derived>& inout,
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int it
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)
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{
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typedef typename Derived::Scalar Scalar;
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inout = inout.unaryExpr([&it](Scalar v){
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for (int k = 0; k < it; ++k) {
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v = std::nextafter(v, std::signbit(v) ? -std::numeric_limits<Scalar>::infinity(): std::numeric_limits<Scalar>::infinity());
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}
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return v;
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});
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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// generated by autoexplicit.sh
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template void igl::increment_ulp<Eigen::Matrix<float, 1, -1, 1, 1, -1>>(Eigen::MatrixBase<Eigen::Matrix<float, 1, -1, 1, 1, -1>>&, int);
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// generated by autoexplicit.sh
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template void igl::increment_ulp<Eigen::Matrix<float, 1, 3, 1, 1, 3>>(Eigen::MatrixBase<Eigen::Matrix<float, 1, 3, 1, 1, 3>>&, int);
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// generated by autoexplicit.sh
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template void igl::increment_ulp<Eigen::Matrix<double, 1, 3, 1, 1, 3>>(Eigen::MatrixBase<Eigen::Matrix<double, 1, 3, 1, 1, 3>>&, int);
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#endif
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