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openmesh/src/OpenMesh/Core/Mesh/PolyConnectivity.hh
Jan Möbius a3f36c2d73 Some documentation and cleanup for the add_face functions. 
Unittests for add_face on triangle and quad meshes.




git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@600 fdac6126-5c0c-442c-9429-916003d36597
2012-06-21 07:55:12 +00:00

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/*===========================================================================*\
* *
* OpenMesh *
* Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen *
* www.openmesh.org *
* *
*---------------------------------------------------------------------------*
* This file is part of OpenMesh. *
* *
* OpenMesh is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 3 of *
* the License, or (at your option) any later version with the *
* following exceptions: *
* *
* If other files instantiate templates or use macros *
* or inline functions from this file, or you compile this file and *
* link it with other files to produce an executable, this file does *
* not by itself cause the resulting executable to be covered by the *
* GNU Lesser General Public License. This exception does not however *
* invalidate any other reasons why the executable file might be *
* covered by the GNU Lesser General Public License. *
* *
* OpenMesh is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU LesserGeneral Public *
* License along with OpenMesh. If not, *
* see <http://www.gnu.org/licenses/>. *
* *
\*===========================================================================*/
/*===========================================================================*\
* *
* $Revision$ *
* $Date$ *
* *
\*===========================================================================*/
#ifndef OPENMESH_POLYCONNECTIVITY_HH
#define OPENMESH_POLYCONNECTIVITY_HH
#include <OpenMesh/Core/Mesh/ArrayKernel.hh>
#include <OpenMesh/Core/Mesh/IteratorsT.hh>
#include <OpenMesh/Core/Mesh/CirculatorsT.hh>
namespace OpenMesh
{
/** \brief Connectivity Class for polygonal meshes
*/
class PolyConnectivity : public ArrayKernel
{
public:
/// \name Mesh Handles
//@{
/// Invalid handle
static const VertexHandle InvalidVertexHandle;
/// Invalid handle
static const HalfedgeHandle InvalidHalfedgeHandle;
/// Invalid handle
static const EdgeHandle InvalidEdgeHandle;
/// Invalid handle
static const FaceHandle InvalidFaceHandle;
//@}
typedef PolyConnectivity This;
//--- iterators ---
/** \name Mesh Iterators
Refer to OpenMesh::Mesh::Iterators or \ref mesh_iterators for
documentation.
*/
//@{
/// Linear iterator
typedef Iterators::GenericIteratorT<This, This::VertexHandle, ArrayKernel, &This::has_vertex_status, &This::n_vertices> VertexIter;
typedef Iterators::GenericIteratorT<This, This::HalfedgeHandle, ArrayKernel, &This::has_halfedge_status, &This::n_halfedges> HalfedgeIter;
typedef Iterators::GenericIteratorT<This, This::EdgeHandle, ArrayKernel, &This::has_edge_status, &This::n_edges> EdgeIter;
typedef Iterators::GenericIteratorT<This, This::FaceHandle, ArrayKernel, &This::has_face_status, &This::n_faces> FaceIter;
typedef VertexIter ConstVertexIter;
typedef HalfedgeIter ConstHalfedgeIter;
typedef EdgeIter ConstEdgeIter;
typedef FaceIter ConstFaceIter;
//@}
//--- circulators ---
/** \name Mesh Circulators
Refer to OpenMesh::Mesh::Iterators or \ref mesh_iterators
for documentation.
*/
//@{
/// Circulator
typedef Iterators::VertexVertexIterT<This> VertexVertexIter;
typedef Iterators::VertexOHalfedgeIterT<This> VertexOHalfedgeIter;
typedef Iterators::VertexIHalfedgeIterT<This> VertexIHalfedgeIter;
typedef Iterators::VertexEdgeIterT<This> VertexEdgeIter;
typedef Iterators::VertexFaceIterT<This> VertexFaceIter;
typedef Iterators::FaceVertexIterT<This> FaceVertexIter;
typedef Iterators::FaceHalfedgeIterT<This> FaceHalfedgeIter;
typedef Iterators::FaceEdgeIterT<This> FaceEdgeIter;
typedef Iterators::FaceFaceIterT<This> FaceFaceIter;
typedef Iterators::ConstVertexVertexIterT<This> ConstVertexVertexIter;
typedef Iterators::ConstVertexOHalfedgeIterT<This> ConstVertexOHalfedgeIter;
typedef Iterators::ConstVertexIHalfedgeIterT<This> ConstVertexIHalfedgeIter;
typedef Iterators::ConstVertexEdgeIterT<This> ConstVertexEdgeIter;
typedef Iterators::ConstVertexFaceIterT<This> ConstVertexFaceIter;
typedef Iterators::ConstFaceVertexIterT<This> ConstFaceVertexIter;
typedef Iterators::ConstFaceHalfedgeIterT<This> ConstFaceHalfedgeIter;
typedef Iterators::ConstFaceEdgeIterT<This> ConstFaceEdgeIter;
typedef Iterators::ConstFaceFaceIterT<This> ConstFaceFaceIter;
//@}
// --- shortcuts
/** \name Typedef Shortcuts
Provided for convenience only
*/
//@{
/// Alias typedef
typedef VertexHandle VHandle;
typedef HalfedgeHandle HHandle;
typedef EdgeHandle EHandle;
typedef FaceHandle FHandle;
typedef VertexIter VIter;
typedef HalfedgeIter HIter;
typedef EdgeIter EIter;
typedef FaceIter FIter;
typedef ConstVertexIter CVIter;
typedef ConstHalfedgeIter CHIter;
typedef ConstEdgeIter CEIter;
typedef ConstFaceIter CFIter;
typedef VertexVertexIter VVIter;
typedef VertexOHalfedgeIter VOHIter;
typedef VertexIHalfedgeIter VIHIter;
typedef VertexEdgeIter VEIter;
typedef VertexFaceIter VFIter;
typedef FaceVertexIter FVIter;
typedef FaceHalfedgeIter FHIter;
typedef FaceEdgeIter FEIter;
typedef FaceFaceIter FFIter;
typedef ConstVertexVertexIter CVVIter;
typedef ConstVertexOHalfedgeIter CVOHIter;
typedef ConstVertexIHalfedgeIter CVIHIter;
typedef ConstVertexEdgeIter CVEIter;
typedef ConstVertexFaceIter CVFIter;
typedef ConstFaceVertexIter CFVIter;
typedef ConstFaceHalfedgeIter CFHIter;
typedef ConstFaceEdgeIter CFEIter;
typedef ConstFaceFaceIter CFFIter;
//@}
public:
PolyConnectivity() {}
virtual ~PolyConnectivity() {}
inline static bool is_triangles()
{ return false; }
/** assign_connectivity() method. See ArrayKernel::assign_connectivity()
for more details. */
inline void assign_connectivity(const PolyConnectivity& _other)
{ ArrayKernel::assign_connectivity(_other); }
/** \name Adding items to a mesh
*/
//@{
/// Add a new vertex
inline VertexHandle add_vertex()
{ return new_vertex(); }
/** \brief Add and connect a new face
*
* Create a new face consisting of the vertices provided by the vertex handle vector.
* (The vertices have to be already added to the mesh by add_vertex)
*
* @param _vhandles sorted list of vertex handles (also defines order in which the vertices are added to the face)
*/
FaceHandle add_face(const std::vector<VertexHandle>& _vhandles);
/** \brief Add and connect a new face
*
* Create a new face consisting of three vertices provided by the handles.
* (The vertices have to be already added to the mesh by add_vertex)
*
* @param _vh0 First vertex handle
* @param _vh1 Second vertex handle
* @param _vh2 Third vertex handle
*/
FaceHandle add_face(VertexHandle _vh0, VertexHandle _vh1, VertexHandle _vh2);
/** \brief Add and connect a new face
*
* Create a new face consisting of four vertices provided by the handles.
* (The vertices have to be already added to the mesh by add_vertex)
*
* @param _vh0 First vertex handle
* @param _vh1 Second vertex handle
* @param _vh2 Third vertex handle
* @param _vh3 Fourth vertex handle
*/
FaceHandle add_face(VertexHandle _vh0, VertexHandle _vh1, VertexHandle _vh2, VertexHandle _vh3);
/** \brief Add and connect a new face
*
* Create a new face consisting of vertices provided by a handle array.
* (The vertices have to be already added to the mesh by add_vertex)
*
* @param _vhandles pointer to a sorted list of vertex handles (also defines order in which the vertices are added to the face)
* @param _vhs_size number of vertex handles in the array
*/
FaceHandle add_face(const VertexHandle* _vhandles, size_t _vhs_size);
//@}
/// \name Deleting mesh items and other connectivity/topology modifications
//@{
/** Returns whether collapsing halfedge _heh is ok or would lead to
topological inconsistencies.
\attention This method need the Attributes::Status attribute and
changes the \em tagged bit. */
bool is_collapse_ok(HalfedgeHandle _he);
/** Mark vertex and all incident edges and faces deleted.
Items marked deleted will be removed by garbageCollection().
\attention Needs the Attributes::Status attribute for vertices,
edges and faces.
*/
void delete_vertex(VertexHandle _vh, bool _delete_isolated_vertices = true);
/** Mark edge (two opposite halfedges) and incident faces deleted.
Resulting isolated vertices are marked deleted if
_delete_isolated_vertices is true. Items marked deleted will be
removed by garbageCollection().
\attention Needs the Attributes::Status attribute for vertices,
edges and faces.
*/
void delete_edge(EdgeHandle _eh, bool _delete_isolated_vertices=true);
/** Delete face _fh and resulting degenerated empty halfedges as
well. Resultling isolated vertices will be deleted if
_delete_isolated_vertices is true.
\attention All item will only be marked to be deleted. They will
actually be removed by calling garbage_collection().
\attention Needs the Attributes::Status attribute for vertices,
edges and faces.
*/
void delete_face(FaceHandle _fh, bool _delete_isolated_vertices=true);
//@}
/** \name Begin and end iterators
*/
//@{
/// Begin iterator for vertices
VertexIter vertices_begin()
{ return VertexIter(*this, VertexHandle(0)); }
/// Const begin iterator for vertices
ConstVertexIter vertices_begin() const
{ return ConstVertexIter(*this, VertexHandle(0)); }
/// End iterator for vertices
VertexIter vertices_end()
{ return VertexIter(*this, VertexHandle(n_vertices())); }
/// Const end iterator for vertices
ConstVertexIter vertices_end() const
{ return ConstVertexIter(*this, VertexHandle(n_vertices())); }
/// Begin iterator for halfedges
HalfedgeIter halfedges_begin()
{ return HalfedgeIter(*this, HalfedgeHandle(0)); }
/// Const begin iterator for halfedges
ConstHalfedgeIter halfedges_begin() const
{ return ConstHalfedgeIter(*this, HalfedgeHandle(0)); }
/// End iterator for halfedges
HalfedgeIter halfedges_end()
{ return HalfedgeIter(*this, HalfedgeHandle(n_halfedges())); }
/// Const end iterator for halfedges
ConstHalfedgeIter halfedges_end() const
{ return ConstHalfedgeIter(*this, HalfedgeHandle(n_halfedges())); }
/// Begin iterator for edges
EdgeIter edges_begin()
{ return EdgeIter(*this, EdgeHandle(0)); }
/// Const begin iterator for edges
ConstEdgeIter edges_begin() const
{ return ConstEdgeIter(*this, EdgeHandle(0)); }
/// End iterator for edges
EdgeIter edges_end()
{ return EdgeIter(*this, EdgeHandle(n_edges())); }
/// Const end iterator for edges
ConstEdgeIter edges_end() const
{ return ConstEdgeIter(*this, EdgeHandle(n_edges())); }
/// Begin iterator for faces
FaceIter faces_begin()
{ return FaceIter(*this, FaceHandle(0)); }
/// Const begin iterator for faces
ConstFaceIter faces_begin() const
{ return ConstFaceIter(*this, FaceHandle(0)); }
/// End iterator for faces
FaceIter faces_end()
{ return FaceIter(*this, FaceHandle(n_faces())); }
/// Const end iterator for faces
ConstFaceIter faces_end() const
{ return ConstFaceIter(*this, FaceHandle(n_faces())); }
//@}
/** \name Begin for skipping iterators
*/
//@{
/// Begin iterator for vertices
VertexIter vertices_sbegin()
{ return VertexIter(*this, VertexHandle(0), true); }
/// Const begin iterator for vertices
ConstVertexIter vertices_sbegin() const
{ return ConstVertexIter(*this, VertexHandle(0), true); }
/// Begin iterator for halfedges
HalfedgeIter halfedges_sbegin()
{ return HalfedgeIter(*this, HalfedgeHandle(0), true); }
/// Const begin iterator for halfedges
ConstHalfedgeIter halfedges_sbegin() const
{ return ConstHalfedgeIter(*this, HalfedgeHandle(0), true); }
/// Begin iterator for edges
EdgeIter edges_sbegin()
{ return EdgeIter(*this, EdgeHandle(0), true); }
/// Const begin iterator for edges
ConstEdgeIter edges_sbegin() const
{ return ConstEdgeIter(*this, EdgeHandle(0), true); }
/// Begin iterator for faces
FaceIter faces_sbegin()
{ return FaceIter(*this, FaceHandle(0), true); }
/// Const begin iterator for faces
ConstFaceIter faces_sbegin() const
{ return ConstFaceIter(*this, FaceHandle(0), true); }
//@}
//--- circulators ---
/** \name Vertex and Face circulators
*/
//@{
/// vertex - vertex circulator
VertexVertexIter vv_iter(VertexHandle _vh)
{ return VertexVertexIter(*this, _vh); }
/// vertex - incoming halfedge circulator
VertexIHalfedgeIter vih_iter(VertexHandle _vh)
{ return VertexIHalfedgeIter(*this, _vh); }
/// vertex - outgoing halfedge circulator
VertexOHalfedgeIter voh_iter(VertexHandle _vh)
{ return VertexOHalfedgeIter(*this, _vh); }
/// vertex - edge circulator
VertexEdgeIter ve_iter(VertexHandle _vh)
{ return VertexEdgeIter(*this, _vh); }
/// vertex - face circulator
VertexFaceIter vf_iter(VertexHandle _vh)
{ return VertexFaceIter(*this, _vh); }
/// const vertex circulator
ConstVertexVertexIter cvv_iter(VertexHandle _vh) const
{ return ConstVertexVertexIter(*this, _vh); }
/// const vertex - incoming halfedge circulator
ConstVertexIHalfedgeIter cvih_iter(VertexHandle _vh) const
{ return ConstVertexIHalfedgeIter(*this, _vh); }
/// const vertex - outgoing halfedge circulator
ConstVertexOHalfedgeIter cvoh_iter(VertexHandle _vh) const
{ return ConstVertexOHalfedgeIter(*this, _vh); }
/// const vertex - edge circulator
ConstVertexEdgeIter cve_iter(VertexHandle _vh) const
{ return ConstVertexEdgeIter(*this, _vh); }
/// const vertex - face circulator
ConstVertexFaceIter cvf_iter(VertexHandle _vh) const
{ return ConstVertexFaceIter(*this, _vh); }
/// face - vertex circulator
FaceVertexIter fv_iter(FaceHandle _fh)
{ return FaceVertexIter(*this, _fh); }
/// face - halfedge circulator
FaceHalfedgeIter fh_iter(FaceHandle _fh)
{ return FaceHalfedgeIter(*this, _fh); }
/// face - edge circulator
FaceEdgeIter fe_iter(FaceHandle _fh)
{ return FaceEdgeIter(*this, _fh); }
/// face - face circulator
FaceFaceIter ff_iter(FaceHandle _fh)
{ return FaceFaceIter(*this, _fh); }
/// const face - vertex circulator
ConstFaceVertexIter cfv_iter(FaceHandle _fh) const
{ return ConstFaceVertexIter(*this, _fh); }
/// const face - halfedge circulator
ConstFaceHalfedgeIter cfh_iter(FaceHandle _fh) const
{ return ConstFaceHalfedgeIter(*this, _fh); }
/// const face - edge circulator
ConstFaceEdgeIter cfe_iter(FaceHandle _fh) const
{ return ConstFaceEdgeIter(*this, _fh); }
/// const face - face circulator
ConstFaceFaceIter cff_iter(FaceHandle _fh) const
{ return ConstFaceFaceIter(*this, _fh); }
// 'begin' circulators
/// vertex - vertex circulator
VertexVertexIter vv_begin(VertexHandle _vh)
{ return VertexVertexIter(*this, _vh); }
/// vertex - incoming halfedge circulator
VertexIHalfedgeIter vih_begin(VertexHandle _vh)
{ return VertexIHalfedgeIter(*this, _vh); }
/// vertex - outgoing halfedge circulator
VertexOHalfedgeIter voh_begin(VertexHandle _vh)
{ return VertexOHalfedgeIter(*this, _vh); }
/// vertex - edge circulator
VertexEdgeIter ve_begin(VertexHandle _vh)
{ return VertexEdgeIter(*this, _vh); }
/// vertex - face circulator
VertexFaceIter vf_begin(VertexHandle _vh)
{ return VertexFaceIter(*this, _vh); }
/// const vertex circulator
ConstVertexVertexIter cvv_begin(VertexHandle _vh) const
{ return ConstVertexVertexIter(*this, _vh); }
/// const vertex - incoming halfedge circulator
ConstVertexIHalfedgeIter cvih_begin(VertexHandle _vh) const
{ return ConstVertexIHalfedgeIter(*this, _vh); }
/// const vertex - outgoing halfedge circulator
ConstVertexOHalfedgeIter cvoh_begin(VertexHandle _vh) const
{ return ConstVertexOHalfedgeIter(*this, _vh); }
/// const vertex - edge circulator
ConstVertexEdgeIter cve_begin(VertexHandle _vh) const
{ return ConstVertexEdgeIter(*this, _vh); }
/// const vertex - face circulator
ConstVertexFaceIter cvf_begin(VertexHandle _vh) const
{ return ConstVertexFaceIter(*this, _vh); }
/// face - vertex circulator
FaceVertexIter fv_begin(FaceHandle _fh)
{ return FaceVertexIter(*this, _fh); }
/// face - halfedge circulator
FaceHalfedgeIter fh_begin(FaceHandle _fh)
{ return FaceHalfedgeIter(*this, _fh); }
/// face - edge circulator
FaceEdgeIter fe_begin(FaceHandle _fh)
{ return FaceEdgeIter(*this, _fh); }
/// face - face circulator
FaceFaceIter ff_begin(FaceHandle _fh)
{ return FaceFaceIter(*this, _fh); }
/// const face - vertex circulator
ConstFaceVertexIter cfv_begin(FaceHandle _fh) const
{ return ConstFaceVertexIter(*this, _fh); }
/// const face - halfedge circulator
ConstFaceHalfedgeIter cfh_begin(FaceHandle _fh) const
{ return ConstFaceHalfedgeIter(*this, _fh); }
/// const face - edge circulator
ConstFaceEdgeIter cfe_begin(FaceHandle _fh) const
{ return ConstFaceEdgeIter(*this, _fh); }
/// const face - face circulator
ConstFaceFaceIter cff_begin(FaceHandle _fh) const
{ return ConstFaceFaceIter(*this, _fh); }
// 'end' circulators
/// vertex - vertex circulator
VertexVertexIter vv_end(VertexHandle _vh)
{ return VertexVertexIter(*this, _vh, true); }
/// vertex - incoming halfedge circulator
VertexIHalfedgeIter vih_end(VertexHandle _vh)
{ return VertexIHalfedgeIter(*this, _vh, true); }
/// vertex - outgoing halfedge circulator
VertexOHalfedgeIter voh_end(VertexHandle _vh)
{ return VertexOHalfedgeIter(*this, _vh, true); }
/// vertex - edge circulator
VertexEdgeIter ve_end(VertexHandle _vh)
{ return VertexEdgeIter(*this, _vh, true); }
/// vertex - face circulator
VertexFaceIter vf_end(VertexHandle _vh)
{ return VertexFaceIter(*this, _vh, true); }
/// const vertex circulator
ConstVertexVertexIter cvv_end(VertexHandle _vh) const
{ return ConstVertexVertexIter(*this, _vh, true); }
/// const vertex - incoming halfedge circulator
ConstVertexIHalfedgeIter cvih_end(VertexHandle _vh) const
{ return ConstVertexIHalfedgeIter(*this, _vh, true); }
/// const vertex - outgoing halfedge circulator
ConstVertexOHalfedgeIter cvoh_end(VertexHandle _vh) const
{ return ConstVertexOHalfedgeIter(*this, _vh, true); }
/// const vertex - edge circulator
ConstVertexEdgeIter cve_end(VertexHandle _vh) const
{ return ConstVertexEdgeIter(*this, _vh, true); }
/// const vertex - face circulator
ConstVertexFaceIter cvf_end(VertexHandle _vh) const
{ return ConstVertexFaceIter(*this, _vh, true); }
/// face - vertex circulator
FaceVertexIter fv_end(FaceHandle _fh)
{ return FaceVertexIter(*this, _fh, true); }
/// face - halfedge circulator
FaceHalfedgeIter fh_end(FaceHandle _fh)
{ return FaceHalfedgeIter(*this, _fh, true); }
/// face - edge circulator
FaceEdgeIter fe_end(FaceHandle _fh)
{ return FaceEdgeIter(*this, _fh, true); }
/// face - face circulator
FaceFaceIter ff_end(FaceHandle _fh)
{ return FaceFaceIter(*this, _fh, true); }
/// const face - vertex circulator
ConstFaceVertexIter cfv_end(FaceHandle _fh) const
{ return ConstFaceVertexIter(*this, _fh, true); }
/// const face - halfedge circulator
ConstFaceHalfedgeIter cfh_end(FaceHandle _fh) const
{ return ConstFaceHalfedgeIter(*this, _fh, true); }
/// const face - edge circulator
ConstFaceEdgeIter cfe_end(FaceHandle _fh) const
{ return ConstFaceEdgeIter(*this, _fh, true); }
/// const face - face circulator
ConstFaceFaceIter cff_end(FaceHandle _fh) const
{ return ConstFaceFaceIter(*this, _fh, true); }
//@}
/** \name Boundary and manifold tests
*/
//@{
bool is_boundary(HalfedgeHandle _heh) const
{ return ArrayKernel::is_boundary(_heh); }
/** Is the edge _eh a boundary edge, i.e. is one of its halfedges
a boundary halfege ? */
bool is_boundary(EdgeHandle _eh) const
{
return (is_boundary(halfedge_handle(_eh, 0)) ||
is_boundary(halfedge_handle(_eh, 1)));
}
/// Is vertex _vh a boundary vertex ?
bool is_boundary(VertexHandle _vh) const
{
HalfedgeHandle heh(halfedge_handle(_vh));
return (!(heh.is_valid() && face_handle(heh).is_valid()));
}
/** Is face _fh at boundary, i.e. is one of its edges (or vertices)
* a boundary edge?
* \param _fh Check this face
* \param _check_vertex If \c true, check the corner vertices of
* the face, too.
*/
bool is_boundary(FaceHandle _fh, bool _check_vertex=false) const;
/// Is (the mesh at) vertex _vh two-manifold ?
bool is_manifold(VertexHandle _vh) const;
//@}
// --- shortcuts ---
/// returns the face handle of the opposite halfedge
inline FaceHandle opposite_face_handle(HalfedgeHandle _heh) const
{ return face_handle(opposite_halfedge_handle(_heh)); }
// --- misc ---
/** Adjust outgoing halfedge handle for vertices, so that it is a
boundary halfedge whenever possible.
*/
void adjust_outgoing_halfedge(VertexHandle _vh);
/// Find halfedge from _vh0 to _vh1. Returns invalid handle if not found.
HalfedgeHandle find_halfedge(VertexHandle _start_vh, VertexHandle _end_vh) const;
/// Vertex valence
uint valence(VertexHandle _vh) const;
/// Face valence
uint valence(FaceHandle _fh) const;
// --- connectivity operattions
/** Halfedge collapse: collapse the from-vertex of halfedge _heh
into its to-vertex.
\attention Needs vertex/edge/face status attribute in order to
delete the items that degenerate.
\note The from vertex is marked as deleted while the to vertex will still exist.
\note This function does not perform a garbage collection. It
only marks degenerate items as deleted.
\attention A halfedge collapse may lead to topological inconsistencies.
Therefore you should check this using is_collapse_ok().
*/
void collapse(HalfedgeHandle _heh);
/** return true if the this the only link between the faces adjacent to _eh.
_eh is allowed to be boundary, in which case true is returned iff _eh is
the only boundary edge of its ajdacent face.
*/
bool is_simple_link(EdgeHandle _eh) const;
/** return true if _fh shares only one edge with all of its adjacent faces.
Boundary is treated as one face, i.e., the function false if _fh has more
than one boundary edge.
*/
bool is_simply_connected(FaceHandle _fh) const;
/** Removes the edge _eh. Its adjacent faces are merged. _eh and one of the
adjacent faces are set deleted. The handle of the remaining face is
returned (InvalidFaceHandle is returned if _eh is a boundary edge).
\pre is_simple_link(_eh). This ensures that there are no hole faces
or isolated vertices appearing in result of the operation.
\attention Needs the Attributes::Status attribute for edges and faces.
\note This function does not perform a garbage collection. It
only marks items as deleted.
*/
FaceHandle remove_edge(EdgeHandle _eh);
/** Inverse of remove_edge. _eh should be the handle of the edge and the
vertex and halfedge handles pointed by edge(_eh) should be valid.
*/
void reinsert_edge(EdgeHandle _eh);
/** Inserts an edge between to_vh(_prev_heh) and from_vh(_next_heh).
A new face is created started at heh0 of the inserted edge and
its halfedges loop includes both _prev_heh and _next_heh. If an
old face existed which includes the argument halfedges, it is
split at the new edge. heh0 is returned.
\note assumes _prev_heh and _next_heh are either boundary or pointed
to the same face
*/
HalfedgeHandle insert_edge(HalfedgeHandle _prev_heh, HalfedgeHandle _next_heh);
/// Face split (= 1-to-n split)
void split(FaceHandle _fh, VertexHandle _vh);
/** \brief Triangulate the face _fh
Split an arbitrary face into triangles by connecting
each vertex of fh after its second to vh.
\note _fh will remain valid (it will become one of the
triangles)
\note The halfedge handles of the new triangles will
point to the old halfedges
@param _fh Handle of the face that should be triangulated
*/
void triangulate(FaceHandle _fh);
/** \brief triangulate the entire mesh
*/
void triangulate();
/// Edge split (inserts a vertex on the edge only)
void split_edge(EdgeHandle _eh, VertexHandle _vh);
/** \name Generic handle derefertiation.
Calls the respective vertex(), halfedge(), edge(), face()
method of the mesh kernel.
*/
//@{
/// Get item from handle
const Vertex& deref(VertexHandle _h) const { return vertex(_h); }
Vertex& deref(VertexHandle _h) { return vertex(_h); }
const Halfedge& deref(HalfedgeHandle _h) const { return halfedge(_h); }
Halfedge& deref(HalfedgeHandle _h) { return halfedge(_h); }
const Edge& deref(EdgeHandle _h) const { return edge(_h); }
Edge& deref(EdgeHandle _h) { return edge(_h); }
const Face& deref(FaceHandle _h) const { return face(_h); }
Face& deref(FaceHandle _h) { return face(_h); }
//@}
protected:
/// Helper for halfedge collapse
void collapse_edge(HalfedgeHandle _hh);
/// Helper for halfedge collapse
void collapse_loop(HalfedgeHandle _hh);
private: // Working storage for add_face()
struct AddFaceEdgeInfo
{
HalfedgeHandle halfedge_handle;
bool is_new;
bool needs_adjust;
};
std::vector<AddFaceEdgeInfo> edgeData_; //
std::vector<std::pair<HalfedgeHandle, HalfedgeHandle> > next_cache_; // cache for set_next_halfedge and vertex' set_halfedge
uint next_cache_count_;
};
}//namespace OpenMesh
#endif//OPENMESH_POLYCONNECTIVITY_HH
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