97f515985d
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597
131 lines
5.1 KiB
C++
131 lines
5.1 KiB
C++
/*===========================================================================*\
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* *
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* OpenMesh *
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* Copyright (C) 2004 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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* *
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* License *
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* *
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* This library is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU Lesser General Public License as published *
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* by the Free Software Foundation, version 2.1. *
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* *
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* This library is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with this library; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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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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class 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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/** 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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FaceHandle add_face(const std::vector<VertexHandle>& _vhandles)
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{ return add_face(&_vhandles.front(), _vhandles.size()); }
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FaceHandle add_face(const VertexHandle* _vhandles, uint _vhs_size);
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FaceHandle add_face(VertexHandle _vh0, VertexHandle _vh1, VertexHandle _vh2)
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{
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VertexHandle vhs[3] = { _vh0, _vh1, _vh2 };
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return PolyConnectivity::add_face(vhs, 3);
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}
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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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/// Edge split (= 2-to-4 split)
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void split(EdgeHandle _eh, VertexHandle _vh);
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/// Face split (= 1-to-3 split, calls corresponding PolyMeshT function).
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inline void split(FaceHandle _fh, VertexHandle _vh)
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{ PolyConnectivity::split(_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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