c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
43 lines
1.0 KiB
C++
43 lines
1.0 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* The Original Code is:
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* GXML/Graphite: Geometry and Graphics Programming Library + Utilities
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* Copyright 2000 Bruno Levy <levy@loria.fr> */
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#pragma once
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/** \file
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* \ingroup freestyle
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*/
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#include "../system/FreestyleConfig.h"
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namespace Freestyle {
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namespace OGF {
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namespace MatrixUtil {
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/**
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* computes the eigen values and eigen vectors of a semi definite symmetric matrix
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*
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* \param mat: The matrix stored in column symmetric storage, i.e.
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* <pre>
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* matrix = { m11, m12, m22, m13, m23, m33, m14, m24, m34, m44 ... }
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* size = n(n+1)/2
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* </pre>
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*
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* \param eigen_vec: (return) = { v1, v2, v3, ..., vn }
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* where `vk = vk0, vk1, ..., vkn`
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* `size = n^2`, must be allocated by caller.
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*
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* \param eigen_val: (return) are in decreasing order
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* `size = n`, must be allocated by caller.
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*/
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void semi_definite_symmetric_eigen(const double *mat, int n, double *eigen_vec, double *eigen_val);
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} // namespace MatrixUtil
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} // namespace OGF
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} /* namespace Freestyle */
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