79 lines
3.0 KiB
C++
79 lines
3.0 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) 2016 Alec Jacobson
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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 "unproject_onto_mesh.h"
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#include "unproject.h"
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#include "unproject_ray.h"
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#include "ray_mesh_intersect.h"
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#include <vector>
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template < typename DerivedV, typename DerivedF, typename Derivedbc>
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IGL_INLINE bool igl::unproject_onto_mesh(
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const Eigen::Vector2f& pos,
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const Eigen::Matrix4f& model,
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const Eigen::Matrix4f& proj,
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const Eigen::Vector4f& viewport,
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::PlainObjectBase<DerivedF> & F,
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int & fid,
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Eigen::PlainObjectBase<Derivedbc> & bc)
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{
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using namespace std;
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using namespace Eigen;
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const auto & shoot_ray = [&V,&F](
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const Eigen::Vector3f& s,
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const Eigen::Vector3f& dir,
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igl::Hit & hit)->bool
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{
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std::vector<igl::Hit> hits;
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if(!ray_mesh_intersect(s,dir,V,F,hits))
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{
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return false;
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}
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hit = hits[0];
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return true;
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};
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return unproject_onto_mesh(pos,model,proj,viewport,shoot_ray,fid,bc);
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}
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template <typename Derivedbc>
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IGL_INLINE bool igl::unproject_onto_mesh(
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const Eigen::Vector2f& pos,
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const Eigen::Matrix4f& model,
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const Eigen::Matrix4f& proj,
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const Eigen::Vector4f& viewport,
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const std::function<
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bool(
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const Eigen::Vector3f&,
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const Eigen::Vector3f&,
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igl::Hit &)
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> & shoot_ray,
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int & fid,
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Eigen::PlainObjectBase<Derivedbc> & bc)
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{
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using namespace std;
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using namespace Eigen;
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Vector3f s,dir;
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unproject_ray(pos,model,proj,viewport,s,dir);
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Hit hit;
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if(!shoot_ray(s,dir,hit))
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{
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return false;
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}
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bc.resize(3);
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bc << 1.0-hit.u-hit.v, hit.u, hit.v;
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fid = hit.id;
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return true;
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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template bool igl::unproject_onto_mesh<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<float, 3, 1, 0, 3, 1> >(Eigen::Matrix<float, 2, 1, 0, 2, 1> const&, Eigen::Matrix<float, 4, 4, 0, 4, 4> const&, Eigen::Matrix<float, 4, 4, 0, 4, 4> const&, Eigen::Matrix<float, 4, 1, 0, 4, 1> const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, int&, Eigen::PlainObjectBase<Eigen::Matrix<float, 3, 1, 0, 3, 1> >&);
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template bool igl::unproject_onto_mesh<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<float, 2, 1, 0, 2, 1> const&, Eigen::Matrix<float, 4, 4, 0, 4, 4> const&, Eigen::Matrix<float, 4, 4, 0, 4, 4> const&, Eigen::Matrix<float, 4, 1, 0, 4, 1> const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, int&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 1, 0, -1, 1> >&);
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#endif
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