libigl_Martin/include/igl/cgal/extract_cells.h

// This file is part of libigl, a simple c++ geometry processing library.
// 
// Copyright (C) 2015 Qingnan Zhou <qnzhou@gmail.com>
// 
// 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_CGAL_EXTRACT_CELLS
#define IGL_CGAL_EXTRACT_CELLS

#include "../igl_inline.h"
#include <Eigen/Core>
#include <vector>

namespace igl {
    namespace cgal {
        // Extract connected 3D space partitioned by mesh (V, F).
        //
        // Inputs:
        //   V  #V by 3 array of vertices.
        //   F  #F by 3 array of faces.
        //
        // Output:
        //   cells  #F by 2 array of cell indices.  cells(i,0) represents the
        //          cell index on the positive side of face i, and cells(i,1)
        //          represents cell index of the negqtive side.
        template<
            typename DerivedV,
            typename DerivedF,
            typename DerivedC >
        IGL_INLINE size_t extract_cells(
                const Eigen::PlainObjectBase<DerivedV>& V,
                const Eigen::PlainObjectBase<DerivedF>& F,
                Eigen::PlainObjectBase<DerivedC>& cells);

        // Extract connected 3D space partitioned by mesh (V, F).
        //
        // Inputs:
        //   V  #V by 3 array of vertices.
        //   F  #F by 3 array of faces.
        //   P  #F list of patch indices.
        //   E  #E by 2 array of vertex indices, one edge per row.
        //  uE    #uE by 2 list of vertex_indices, represents undirected edges.
        //  uE2E  #uE list of lists that maps uE to E. (a one-to-many map)
        //  EMAP  #F*3 list of indices into uE.
        //
        // Output:
        //   cells  #P by 2 array of cell indices.  cells(i,0) represents the
        //          cell index on the positive side of patch i, and cells(i,1)
        //          represents cell index of the negqtive side.
        template<
            typename DerivedV,
            typename DerivedF,
            typename DerivedP,
            typename DerivedE,
            typename DeriveduE,
            typename uE2EType,
            typename DerivedEMAP,
            typename DerivedC >
        IGL_INLINE size_t extract_cells(
                const Eigen::PlainObjectBase<DerivedV>& V,
                const Eigen::PlainObjectBase<DerivedF>& F,
                const Eigen::PlainObjectBase<DerivedP>& P,
                const Eigen::PlainObjectBase<DerivedE>& E,
                const Eigen::PlainObjectBase<DeriveduE>& uE,
                const std::vector<std::vector<uE2EType> >& uE2E,
                const Eigen::PlainObjectBase<DerivedEMAP>& EMAP,
                Eigen::PlainObjectBase<DerivedC>& cells);

        // Extract connected 3D space partitioned by mesh (V, F).  Each
        // connected component of the mesh partitions the ambient space
        // separately.
        //
        // Inputs:
        //   V  #V by 3 array of vertices.
        //   F  #F by 3 array of faces.
        //   P  #F list of patch indices.
        //   E  #E by 2 array of vertex indices, one edge per row.
        //  uE    #uE by 2 list of vertex_indices, represents undirected edges.
        //  uE2E  #uE list of lists that maps uE to E. (a one-to-many map)
        //  EMAP  #F*3 list of indices into uE.
        //
        // Output:
        //   cells  #P by 2 array of cell indices.  cells(i,0) represents the
        //          cell index on the positive side of patch i, and cells(i,1)
        //          represents cell index of the negqtive side.
        template<
            typename DerivedV,
            typename DerivedF,
            typename DerivedP,
            typename DeriveduE,
            typename uE2EType,
            typename DerivedEMAP,
            typename DerivedC >
        IGL_INLINE size_t extract_cells_single_component(
                const Eigen::PlainObjectBase<DerivedV>& V,
                const Eigen::PlainObjectBase<DerivedF>& F,
                const Eigen::PlainObjectBase<DerivedP>& P,
                const Eigen::PlainObjectBase<DeriveduE>& uE,
                const std::vector<std::vector<uE2EType> >& uE2E,
                const Eigen::PlainObjectBase<DerivedEMAP>& EMAP,
                Eigen::PlainObjectBase<DerivedC>& cells);

    }
}

#ifndef IGL_STATIC_LIBRARY
#  include "extract_cells.cpp"
#endif
#endif