TriConnectivity.hh 8.75 KB
 Jan Möbius committed Apr 28, 2015 1 /* ========================================================================= *  Jan Möbius committed Feb 06, 2009 2 3  * * * OpenMesh *  Jan Möbius committed Apr 28, 2015 4  * Copyright (c) 2001-2015, RWTH-Aachen University *  Jan Möbius committed Apr 28, 2015 5  * Department of Computer Graphics and Multimedia *  Jan Möbius committed Apr 28, 2015 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38  * All rights reserved. * * www.openmesh.org * * * *---------------------------------------------------------------------------* * This file is part of OpenMesh. * *---------------------------------------------------------------------------* * * * Redistribution and use in source and binary forms, with or without * * modification, are permitted provided that the following conditions * * are met: * * * * 1. Redistributions of source code must retain the above copyright notice, * * this list of conditions and the following disclaimer. * * * * 2. Redistributions in binary form must reproduce the above copyright * * notice, this list of conditions and the following disclaimer in the * * documentation and/or other materials provided with the distribution. * * * * 3. Neither the name of the copyright holder nor the names of its * * contributors may be used to endorse or promote products derived from * * this software without specific prior written permission. * * * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER * * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *  Jan Möbius committed Apr 28, 2015 39 40  * * * ========================================================================= */  Jan Möbius committed Jun 04, 2009 41 42 43 44 45  /*===========================================================================*\ * * * $Revision$ * * $Date$ *  Jan Möbius committed Feb 06, 2009 46 47 48 49 50 51 52 53 54 55  * * \*===========================================================================*/ #ifndef OPENMESH_TRICONNECTIVITY_HH #define OPENMESH_TRICONNECTIVITY_HH #include namespace OpenMesh {  Jan Möbius committed Nov 14, 2011 56 /** \brief Connectivity Class for Triangle Meshes  57 */  Jan Möbius committed Sep 23, 2012 58 class OPENMESHDLLEXPORT TriConnectivity : public PolyConnectivity  Jan Möbius committed Feb 06, 2009 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 { public: TriConnectivity() {} virtual ~TriConnectivity() {} inline static bool is_triangles() { return true; } /** assign_connectivity() methods. See ArrayKernel::assign_connectivity() for more details. When the source connectivity is not triangles, in addition "fan" connectivity triangulation is performed*/ inline void assign_connectivity(const TriConnectivity& _other) { PolyConnectivity::assign_connectivity(_other); } inline void assign_connectivity(const PolyConnectivity& _other) { PolyConnectivity::assign_connectivity(_other); triangulate(); } /** \name Addding items to a mesh */  Jan Möbius committed Jun 21, 2012 82   Jan Möbius committed Feb 06, 2009 83  //@{  Jan Möbius committed Jun 21, 2012 84 85 86 87 88 89 90 91 92  /** \brief Add a face with arbitrary valence to the triangle mesh * * Override OpenMesh::Mesh::PolyMeshT::add_face(). Faces that aren't * triangles will be triangulated and added. In this case an * invalid face handle will be returned. * * * */  Jan Möbius committed Mar 20, 2012 93  FaceHandle add_face(const VertexHandle* _vhandles, size_t _vhs_size);  Jan Möbius committed Feb 06, 2009 94   Jan Möbius committed Jun 21, 2012 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115  /** \brief Add a face with arbitrary valence to the triangle mesh * * Override OpenMesh::Mesh::PolyMeshT::add_face(). Faces that aren't * triangles will be triangulated and added. In this case an * invalid face handle will be returned. * * * */ FaceHandle add_face(const std::vector& _vhandles); /** \brief Add a face to the mesh (triangle) * * This function adds a triangle to the mesh. The triangle is passed directly * to the underlying PolyConnectivity as we don't explicitly need to triangulate something. * * @param _vh0 VertexHandle 1 * @param _vh1 VertexHandle 2 * @param _vh2 VertexHandle 3 * @return FaceHandle of the added face (invalid, if the operation failed) */ FaceHandle add_face(VertexHandle _vh0, VertexHandle _vh1, VertexHandle _vh2);  Jan Möbius committed Feb 06, 2009 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155  //@} /** Returns the opposite vertex to the halfedge _heh in the face referenced by _heh returns InvalidVertexHandle if the _heh is boundary */ inline VertexHandle opposite_vh(HalfedgeHandle _heh) const { return is_boundary(_heh) ? InvalidVertexHandle : to_vertex_handle(next_halfedge_handle(_heh)); } /** Returns the opposite vertex to the opposite halfedge of _heh in the face referenced by it returns InvalidVertexHandle if the opposite halfedge is boundary */ VertexHandle opposite_he_opposite_vh(HalfedgeHandle _heh) const { return opposite_vh(opposite_halfedge_handle(_heh)); } /** \name Topology modifying operators */ //@{ /** 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 _heh); /// Vertex Split: inverse operation to collapse(). HalfedgeHandle vertex_split(VertexHandle v0, VertexHandle v1, VertexHandle vl, VertexHandle vr); /// Check whether flipping _eh is topologically correct. bool is_flip_ok(EdgeHandle _eh) const; /** Flip edge _eh. Check for topological correctness first using is_flip_ok(). */ void flip(EdgeHandle _eh);  Jan Möbius committed Sep 19, 2012 156 157 158 159 160 161 162 163 164 165 166 167  /** \brief Edge split (= 2-to-4 split) * * * The function will introduce two new faces ( non-boundary case) or * one additional face (if edge is boundary) * * \note The properties of the new edges, halfedges, and faces will be undefined! * * @param _eh Edge handle that should be splitted * @param _vh Vertex handle that will be inserted at the edge */  Jan Möbius committed Feb 06, 2009 168 169  void split(EdgeHandle _eh, VertexHandle _vh);  Jan Möbius committed Sep 19, 2012 170 171 172 173 174 175 176 177 178 179 180 181 182  /** \brief Edge split (= 2-to-4 split) * * The function will introduce two new faces ( non-boundary case) or * one additional face (if edge is boundary) * * \note The properties of the new edges will be adjusted to the properties of the original edge * \note The properties of the new faces and halfedges will be undefined * * @param _eh Edge handle that should be splitted * @param _vh Vertex handle that will be inserted at the edge */ void split_copy(EdgeHandle _eh, VertexHandle _vh);  Jan Möbius committed Nov 06, 2012 183  /** \brief Face split (= 1-to-3) split, calls corresponding PolyMeshT function).  Jan Möbius committed Sep 19, 2012 184 185 186 187  * * @param _fh Face handle that should be splitted * @param _vh Vertex handle that will be inserted at the face */  Jan Möbius committed Feb 06, 2009 188 189 190  inline void split(FaceHandle _fh, VertexHandle _vh) { PolyConnectivity::split(_fh, _vh); }  Jan Möbius committed Nov 06, 2012 191  /** \brief Face split (= 1-to-3) split, calls corresponding PolyMeshT function).  Jan Möbius committed Sep 19, 2012 192 193 194 195 196 197 198  * * @param _fh Face handle that should be splitted * @param _vh Vertex handle that will be inserted at the face */ inline void split_copy(FaceHandle _fh, VertexHandle _vh) { PolyConnectivity::split_copy(_fh, _vh); }  Jan Möbius committed Feb 06, 2009 199 200 201 202 203 204 205 206 207 208 209 210 211  //@} private: /// Helper for vertex split HalfedgeHandle insert_loop(HalfedgeHandle _hh); /// Helper for vertex split HalfedgeHandle insert_edge(VertexHandle _vh, HalfedgeHandle _h0, HalfedgeHandle _h1); }; } #endif//OPENMESH_TRICONNECTIVITY_HH