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
64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* The Original Code is:
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* OGF/Graphite: Geometry and Graphics Programming Library + Utilities
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* Copyright 2000 Bruno Levy <levy@loria.fr> */
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/** \file
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* \ingroup freestyle
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*/
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#include "normal_cycle.h"
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#include "matrix_util.h"
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namespace Freestyle::OGF {
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//_________________________________________________________
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void NormalCycle::begin()
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{
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M_[0] = M_[1] = M_[2] = M_[3] = M_[4] = M_[5] = 0;
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}
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void NormalCycle::end()
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{
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double eigen_vectors[9];
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MatrixUtil::semi_definite_symmetric_eigen(M_, 3, eigen_vectors, eigen_value_);
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axis_[0] = Vec3r(eigen_vectors[0], eigen_vectors[1], eigen_vectors[2]);
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axis_[1] = Vec3r(eigen_vectors[3], eigen_vectors[4], eigen_vectors[5]);
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axis_[2] = Vec3r(eigen_vectors[6], eigen_vectors[7], eigen_vectors[8]);
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// Normalize the eigen vectors
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for (int i = 0; i < 3; i++) {
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axis_[i].normalize();
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}
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// Sort the eigen vectors
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i_[0] = 0;
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i_[1] = 1;
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i_[2] = 2;
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double l0 = ::fabs(eigen_value_[0]);
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double l1 = ::fabs(eigen_value_[1]);
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double l2 = ::fabs(eigen_value_[2]);
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if (l1 > l0) {
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ogf_swap(l0, l1);
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ogf_swap(i_[0], i_[1]);
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}
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if (l2 > l1) {
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ogf_swap(l1, l2);
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ogf_swap(i_[1], i_[2]);
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}
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if (l1 > l0) {
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ogf_swap(l0, l1);
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ogf_swap(i_[0], i_[1]);
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}
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}
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//_________________________________________________________
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} // namespace Freestyle::OGF
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