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.
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/* SPDX-FileCopyrightText: 2015 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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/** \file
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* \ingroup bli
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*/
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#include "BLI_compiler_attrs.h"
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#include "BLI_math_inline.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef BLI_MATH_GCC_WARN_PRAGMA
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# pragma GCC diagnostic push
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# pragma GCC diagnostic ignored "-Wredundant-decls"
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#endif
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/* -------------------------------------------------------------------- */
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/** \name Covariance Matrices
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* \{ */
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/**
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* \brief Compute the covariance matrix of given set of nD coordinates.
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*
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* \param n: the dimension of the vectors (and hence, of the covariance matrix to compute).
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* \param cos_vn: the nD points to compute covariance from.
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* \param cos_vn_num: the number of nD coordinates in cos_vn.
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* \param center: the center (or mean point) of cos_vn. If NULL,
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* it is assumed cos_vn is already centered.
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* \param use_sample_correction: whether to apply sample correction
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* (i.e. get 'sample variance' instead of 'population variance').
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* \return r_covmat the computed covariance matrix.
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*/
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void BLI_covariance_m_vn_ex(int n,
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const float *cos_vn,
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int cos_vn_num,
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const float *center,
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bool use_sample_correction,
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float *r_covmat);
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/**
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* \brief Compute the covariance matrix of given set of 3D coordinates.
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*
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* \param cos_v3: the 3D points to compute covariance from.
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* \param cos_v3_num: the number of 3D coordinates in cos_v3.
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* \return r_covmat the computed covariance matrix.
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* \return r_center the computed center (mean) of 3D points (may be NULL).
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*/
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void BLI_covariance_m3_v3n(const float (*cos_v3)[3],
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int cos_v3_num,
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bool use_sample_correction,
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float r_covmat[3][3],
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float r_center[3]);
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#ifdef BLI_MATH_GCC_WARN_PRAGMA
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# pragma GCC diagnostic pop
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#endif
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/** \} */
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#ifdef __cplusplus
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}
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#endif
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