0a20e0e05c
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@696 fdac6126-5c0c-442c-9429-916003d36597
205 lines
8.2 KiB
C++
205 lines
8.2 KiB
C++
/*===========================================================================*\
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* *
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* OpenMesh *
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* Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen *
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* www.openmesh.org *
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* *
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*---------------------------------------------------------------------------*
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* This file is part of OpenMesh. *
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* *
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* OpenMesh is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation, either version 3 of *
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* the License, or (at your option) any later version with the *
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* following exceptions: *
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* *
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* If other files instantiate templates or use macros *
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* or inline functions from this file, or you compile this file and *
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* link it with other files to produce an executable, this file does *
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* not by itself cause the resulting executable to be covered by the *
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* GNU Lesser General Public License. This exception does not however *
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* invalidate any other reasons why the executable file might be *
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* covered by the GNU Lesser General Public License. *
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* *
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* OpenMesh is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU LesserGeneral Public *
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* License along with OpenMesh. If not, *
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* see <http://www.gnu.org/licenses/>. *
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* *
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\*===========================================================================*/
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/*===========================================================================*\
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* *
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* $Revision$ *
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* $Date$ *
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* *
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\*===========================================================================*/
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#ifndef OPENMESH_TRICONNECTIVITY_HH
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#define OPENMESH_TRICONNECTIVITY_HH
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#include <OpenMesh/Core/Mesh/PolyConnectivity.hh>
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namespace OpenMesh {
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/** \brief Connectivity Class for Triangle Meshes
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*/
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class OPENMESHDLLEXPORT TriConnectivity : public PolyConnectivity
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{
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public:
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TriConnectivity() {}
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virtual ~TriConnectivity() {}
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inline static bool is_triangles()
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{ return true; }
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/** assign_connectivity() methods. See ArrayKernel::assign_connectivity()
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for more details. When the source connectivity is not triangles, in
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addition "fan" connectivity triangulation is performed*/
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inline void assign_connectivity(const TriConnectivity& _other)
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{ PolyConnectivity::assign_connectivity(_other); }
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inline void assign_connectivity(const PolyConnectivity& _other)
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{
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PolyConnectivity::assign_connectivity(_other);
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triangulate();
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}
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/** \name Addding items to a mesh
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*/
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//@{
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/** \brief Add a face with arbitrary valence to the triangle mesh
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*
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* Override OpenMesh::Mesh::PolyMeshT::add_face(). Faces that aren't
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* triangles will be triangulated and added. In this case an
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* invalid face handle will be returned.
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*
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*
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* */
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FaceHandle add_face(const VertexHandle* _vhandles, size_t _vhs_size);
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/** \brief Add a face with arbitrary valence to the triangle mesh
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*
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* Override OpenMesh::Mesh::PolyMeshT::add_face(). Faces that aren't
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* triangles will be triangulated and added. In this case an
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* invalid face handle will be returned.
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*
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*
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* */
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FaceHandle add_face(const std::vector<VertexHandle>& _vhandles);
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/** \brief Add a face to the mesh (triangle)
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*
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* This function adds a triangle to the mesh. The triangle is passed directly
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* to the underlying PolyConnectivity as we don't explicitly need to triangulate something.
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*
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* @param _vh0 VertexHandle 1
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* @param _vh1 VertexHandle 2
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* @param _vh2 VertexHandle 3
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* @return FaceHandle of the added face (invalid, if the operation failed)
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*/
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FaceHandle add_face(VertexHandle _vh0, VertexHandle _vh1, VertexHandle _vh2);
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//@}
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/** Returns the opposite vertex to the halfedge _heh in the face
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referenced by _heh returns InvalidVertexHandle if the _heh is
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boundary */
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inline VertexHandle opposite_vh(HalfedgeHandle _heh) const
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{
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return is_boundary(_heh) ? InvalidVertexHandle :
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to_vertex_handle(next_halfedge_handle(_heh));
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}
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/** Returns the opposite vertex to the opposite halfedge of _heh in
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the face referenced by it returns InvalidVertexHandle if the
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opposite halfedge is boundary */
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VertexHandle opposite_he_opposite_vh(HalfedgeHandle _heh) const
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{ return opposite_vh(opposite_halfedge_handle(_heh)); }
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/** \name Topology modifying operators
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*/
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//@{
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/** Returns whether collapsing halfedge _heh is ok or would lead to
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topological inconsistencies.
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\attention This method need the Attributes::Status attribute and
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changes the \em tagged bit. */
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bool is_collapse_ok(HalfedgeHandle _heh);
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/// Vertex Split: inverse operation to collapse().
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HalfedgeHandle vertex_split(VertexHandle v0, VertexHandle v1,
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VertexHandle vl, VertexHandle vr);
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/// Check whether flipping _eh is topologically correct.
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bool is_flip_ok(EdgeHandle _eh) const;
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/** Flip edge _eh.
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Check for topological correctness first using is_flip_ok(). */
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void flip(EdgeHandle _eh);
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/** \brief Edge split (= 2-to-4 split)
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*
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*
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* The function will introduce two new faces ( non-boundary case) or
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* one additional face (if edge is boundary)
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*
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* \note The properties of the new edges, halfedges, and faces will be undefined!
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*
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* @param _eh Edge handle that should be splitted
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* @param _vh Vertex handle that will be inserted at the edge
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*/
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void split(EdgeHandle _eh, VertexHandle _vh);
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/** \brief Edge split (= 2-to-4 split)
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*
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* The function will introduce two new faces ( non-boundary case) or
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* one additional face (if edge is boundary)
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*
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* \note The properties of the new edges will be adjusted to the properties of the original edge
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* \note The properties of the new faces and halfedges will be undefined
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*
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* @param _eh Edge handle that should be splitted
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* @param _vh Vertex handle that will be inserted at the edge
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*/
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void split_copy(EdgeHandle _eh, VertexHandle _vh);
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/** \brief Face split (= 1-to-3 split, calls corresponding PolyMeshT function).
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*
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* @param _fh Face handle that should be splitted
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* @param _vh Vertex handle that will be inserted at the face
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*/
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inline void split(FaceHandle _fh, VertexHandle _vh)
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{ PolyConnectivity::split(_fh, _vh); }
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/** \brief Face split (= 1-to-3 split, calls corresponding PolyMeshT function).
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*
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* @param _fh Face handle that should be splitted
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* @param _vh Vertex handle that will be inserted at the face
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*/
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inline void split_copy(FaceHandle _fh, VertexHandle _vh)
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{ PolyConnectivity::split_copy(_fh, _vh); }
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//@}
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private:
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/// Helper for vertex split
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HalfedgeHandle insert_loop(HalfedgeHandle _hh);
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/// Helper for vertex split
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HalfedgeHandle insert_edge(VertexHandle _vh,
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HalfedgeHandle _h0, HalfedgeHandle _h1);
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};
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}
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#endif//OPENMESH_TRICONNECTIVITY_HH
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