e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
/* SPDX-FileCopyrightText: 2000 `Bruno Levy <levy@loria.fr>`
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* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* The Original Code is:
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* - GXML/Graphite: Geometry and Graphics Programming Library + Utilities.
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*/
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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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