2ae2672ee9
Fixing dep build script on Windows and removing some warnings. Use bundled igl by default. Not building with the dependency scripts if not explicitly stated. This way, it will stay in Fix the libigl patch to include C source files in header only mode.
64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 Alec Jacobson <alecjacobson@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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#include "project_isometrically_to_plane.h"
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#include "edge_lengths.h"
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedU,
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typename DerivedUF,
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typename Scalar>
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IGL_INLINE void igl::project_isometrically_to_plane(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::PlainObjectBase<DerivedF> & F,
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Eigen::PlainObjectBase<DerivedU> & U,
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Eigen::PlainObjectBase<DerivedUF> & UF,
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Eigen::SparseMatrix<Scalar>& I)
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{
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using namespace std;
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using namespace Eigen;
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assert(F.cols() == 3 && "F should contain triangles");
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typedef DerivedV MatrixX;
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MatrixX l;
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edge_lengths(V,F,l);
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// Number of faces
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const int m = F.rows();
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// First corner at origin
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U = DerivedU::Zero(m*3,2);
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// Second corner along x-axis
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U.block(m,0,m,1) = l.col(2);
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// Third corner rotated onto plane
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U.block(m*2,0,m,1) =
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(-l.col(0).array().square() +
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l.col(1).array().square() +
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l.col(2).array().square())/(2.*l.col(2).array());
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U.block(m*2,1,m,1) =
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(l.col(1).array().square()-U.block(m*2,0,m,1).array().square()).sqrt();
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typedef Triplet<Scalar> IJV;
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vector<IJV > ijv;
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ijv.reserve(3*m);
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UF.resize(m,3);
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for(int f = 0;f<m;f++)
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{
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for(int c = 0;c<3;c++)
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{
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UF(f,c) = c*m+f;
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ijv.push_back(IJV(F(f,c),c*m+f,1));
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}
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}
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I.resize(V.rows(),m*3);
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I.setFromTriplets(ijv.begin(),ijv.end());
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}
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#ifdef IGL_STATIC_LIBRARY
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template void igl::project_isometrically_to_plane<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::Matrix<int, -1, -1, 0, -1, -1>, double>(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> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::SparseMatrix<double, 0, int>&);
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#endif
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