79 lines
3.9 KiB
C++
79 lines
3.9 KiB
C++
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2014 Daniele Panozzo <daniele.panozzo@gmail.com>, Olga Diamanti <olga.diam@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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#ifdef WIN32
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#define _USE_MATH_DEFINES
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#endif
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#include <cmath>
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#include "comb_frame_field.h"
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#include "local_basis.h"
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#include "PI.h"
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template <typename DerivedV, typename DerivedF, typename DerivedP>
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IGL_INLINE void igl::comb_frame_field(const Eigen::PlainObjectBase<DerivedV> &V,
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const Eigen::PlainObjectBase<DerivedF> &F,
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const Eigen::PlainObjectBase<DerivedP> &PD1,
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const Eigen::PlainObjectBase<DerivedP> &PD2,
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const Eigen::PlainObjectBase<DerivedP> &BIS1_combed,
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const Eigen::PlainObjectBase<DerivedP> &BIS2_combed,
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Eigen::PlainObjectBase<DerivedP> &PD1_combed,
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Eigen::PlainObjectBase<DerivedP> &PD2_combed)
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{
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DerivedV B1, B2, B3;
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igl::local_basis(V,F,B1,B2,B3);
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PD1_combed.resize(BIS1_combed.rows(),3);
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PD2_combed.resize(BIS2_combed.rows(),3);
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for (unsigned i=0; i<PD1.rows();++i)
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{
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Eigen::Matrix<typename DerivedP::Scalar,4,3> DIRs;
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DIRs <<
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PD1.row(i),
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-PD1.row(i),
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PD2.row(i),
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-PD2.row(i);
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std::vector<double> a(4);
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double a_combed = atan2(B2.row(i).dot(BIS1_combed.row(i)),B1.row(i).dot(BIS1_combed.row(i)));
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// center on the combed sector center
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for (unsigned j=0;j<4;++j)
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{
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a[j] = atan2(B2.row(i).dot(DIRs.row(j)),B1.row(i).dot(DIRs.row(j))) - a_combed;
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//make it positive by adding some multiple of 2pi
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a[j] += std::ceil (std::max(0., -a[j]) / (igl::PI*2.)) * (igl::PI*2.);
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//take modulo 2pi
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a[j] = fmod(a[j], (igl::PI*2.));
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}
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// now the max is u and the min is v
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int m = std::min_element(a.begin(),a.end())-a.begin();
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int M = std::max_element(a.begin(),a.end())-a.begin();
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assert(
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((m>=0 && m<=1) && (M>=2 && M<=3))
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((m>=2 && m<=3) && (M>=0 && M<=1))
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);
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PD1_combed.row(i) = DIRs.row(m);
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PD2_combed.row(i) = DIRs.row(M);
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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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template void igl::comb_frame_field<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<double, -1, 3, 0, -1, 3> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> >&);
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template void igl::comb_frame_field<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&);
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#endif
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