// This file is part of libigl, a simple c++ geometry processing library. // // Copyright (C) 2015 Alec Jacobson // // This Source Code Form is subject to the terms of the Mozilla Public License // v. 2.0. If a copy of the MPL was not distributed with this file, You can // obtain one at http://mozilla.org/MPL/2.0/. #ifndef IGL_COPYLEFT_CGAL_OUTER_HULL_H #define IGL_COPYLEFT_CGAL_OUTER_HULL_H #include "../../igl_inline.h" #include namespace igl { namespace copyleft { namespace cgal { // Compute the "outer hull" of a piecewise constant winding number induce // triangle mesh (V,F). // // Inputs: // V #V by 3 list of vertex positions // F #F by 3 list of triangle indices into V // Outputs: // HV #HV by 3 list of output vertex positions // HF #HF by 3 list of output triangle indices into HV // J #HF list of indices into F // flip #HF list of whether facet was flipped when added to HF // template < typename DerivedV, typename DerivedF, typename DerivedHV, typename DerivedHF, typename DerivedJ, typename Derivedflip> IGL_INLINE void outer_hull( const Eigen::PlainObjectBase & V, const Eigen::PlainObjectBase & F, Eigen::PlainObjectBase & HV, Eigen::PlainObjectBase & HF, Eigen::PlainObjectBase & J, Eigen::PlainObjectBase & flip); // Compute the "outer hull" of a potentially non-manifold mesh (V,F) whose // intersections have been "resolved" (e.g. using `cork` or // `igl::copyleft::cgal::selfintersect`). The outer hull is defined to be all facets // (regardless of orientation) for which there exists some path from infinity // to the face without intersecting any other facets. For solids, this is the // surface of the solid. In general this includes any thin "wings" or // "flaps". This implementation largely follows Section 3.6 of "Direct // repair of self-intersecting meshes" [Attene 2014]. // // Note: This doesn't require the input mesh to be piecewise constant // winding number, but won't handle multiple non-nested connected // components. // // Inputs: // V #V by 3 list of vertex positions // F #F by 3 list of triangle indices into V // Outputs: // G #G by 3 list of output triangle indices into V // J #G list of indices into F // flip #F list of whether facet was added to G **and** flipped orientation // (false for faces not added to G) template < typename DerivedV, typename DerivedF, typename DerivedG, typename DerivedJ, typename Derivedflip> IGL_INLINE void outer_hull_legacy( const Eigen::PlainObjectBase & V, const Eigen::PlainObjectBase & F, Eigen::PlainObjectBase & G, Eigen::PlainObjectBase & J, Eigen::PlainObjectBase & flip); } } } #ifndef IGL_STATIC_LIBRARY # include "outer_hull.cpp" #endif #endif