OpenMesh: OpenMesh/Core/Mesh/Handles.hh Source File

| OpenMesh

Handles.hh
1 /* ========================================================================= *
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5 * Department of Computer Graphics and Multimedia *
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41
42 /*===========================================================================*\
43 * *
44 * $Revision$ *
45 * $Date$ *
46 * *
47 \*===========================================================================*/
48
49 #ifndef OPENMESH_HANDLES_HH
50 #define OPENMESH_HANDLES_HH
51
52
53 //== INCLUDES =================================================================
54
55 #include <OpenMesh/Core/System/config.h>
56 #include <ostream>
57
58
59 //== NAMESPACES ===============================================================
60
61 namespace OpenMesh {
62
63 //== CLASS DEFINITION =========================================================
64
65
67 class BaseHandle
68 {
69 public:
70
71 explicit BaseHandle(int _idx=-1) : idx_(_idx) {}
72
74 int idx() const { return idx_; }
75
77 bool is_valid() const { return idx_ >= 0; }
78
80 void reset() { idx_=-1; }
82 void invalidate() { idx_ = -1; }
83
84 bool operator==(const BaseHandle& _rhs) const {
85 return (this->idx_ == _rhs.idx_);
86 }
87
88 bool operator!=(const BaseHandle& _rhs) const {
89 return (this->idx_ != _rhs.idx_);
90 }
91
92 bool operator<(const BaseHandle& _rhs) const {
93 return (this->idx_ < _rhs.idx_);
94 }
95
96
97 // this is to be used only by the iterators
98 void __increment() { ++idx_; }
99 void __decrement() { --idx_; }
100
101 void __increment(int amount) { idx_ += amount; }
102 void __decrement(int amount) { idx_ -= amount; }
103
104 private:
105
106 int idx_;
107 };
108
109 // this is used by boost::unordered_set/map
110 inline size_t hash_value(const BaseHandle& h) { return h.idx(); }
111
112 //-----------------------------------------------------------------------------
113
115 inline std::ostream& operator<<(std::ostream& _os, const BaseHandle& _hnd)
116 {
117 return (_os << _hnd.idx());
118 }
119
120
121 //-----------------------------------------------------------------------------
122
123
125 struct VertexHandle : public BaseHandle
126 {
127 explicit VertexHandle(int _idx=-1) : BaseHandle(_idx) {}
128 };
129
130
132 struct HalfedgeHandle : public BaseHandle
133 {
134 explicit HalfedgeHandle(int _idx=-1) : BaseHandle(_idx) {}
135 };
136
137
139 struct EdgeHandle : public BaseHandle
140 {
141 explicit EdgeHandle(int _idx=-1) : BaseHandle(_idx) {}
142 };
143
144
146 struct FaceHandle : public BaseHandle
147 {
148 explicit FaceHandle(int _idx=-1) : BaseHandle(_idx) {}
149 };
150
151
152 //=============================================================================
153 } // namespace OpenMesh
154 //=============================================================================
155
156 #ifdef OM_HAS_HASH
157 #include <functional>
158 namespace std {
159
160 #if defined(_MSVC_VER)
161 # pragma warning(push)
162 # pragma warning(disable:4099) // For VC++ it is class hash
163 #endif
164
165
166 template <>
167 struct hash<OpenMesh::BaseHandle >
168 {
169 typedef OpenMesh::BaseHandle argument_type;
170 typedef std::size_t result_type;
171
172 std::size_t operator()(const OpenMesh::BaseHandle& h) const
173 {
174 return h.idx();
175 }
176 };
177
178 template <>
179 struct hash<OpenMesh::VertexHandle >
180 {
181 typedef OpenMesh::VertexHandle argument_type;
182 typedef std::size_t result_type;
183
184 std::size_t operator()(const OpenMesh::VertexHandle& h) const
185 {
186 return h.idx();
187 }
188 };
189
190 template <>
191 struct hash<OpenMesh::HalfedgeHandle >
192 {
193
194 typedef OpenMesh::HalfedgeHandle argument_type;
195 typedef std::size_t result_type;
196
197 std::size_t operator()(const OpenMesh::HalfedgeHandle& h) const
198 {
199 return h.idx();
200 }
201 };
202
203 template <>
204 struct hash<OpenMesh::EdgeHandle >
205 {
206
207 typedef OpenMesh::EdgeHandle argument_type;
208 typedef std::size_t result_type;
209
210 std::size_t operator()(const OpenMesh::EdgeHandle& h) const
211 {
212 return h.idx();
213 }
214 };
215
216 template <>
217 struct hash<OpenMesh::FaceHandle >
218 {
219
220 typedef OpenMesh::FaceHandle argument_type;
221 typedef std::size_t result_type;
222
223 std::size_t operator()(const OpenMesh::FaceHandle& h) const
224 {
225 return h.idx();
226 }
227 };
228
229 #if defined(_MSVC_VER)
230 # pragma warning(pop)
231 #endif
232
233 }
234 #endif // OM_HAS_HASH
235
236
237 #endif // OPENMESH_HANDLES_HH
238 //=============================================================================
OpenMesh::HalfedgeHandle
Handle for a halfedge entity.
Definition: Handles.hh:132
OpenMesh::operator<<
auto operator<<(std::ostream &os, const VectorT< Scalar, DIM > &_vec) -> typename std::enable_if< sizeof(decltype(os<< _vec[0])) >=0
output a vector by printing its space-separated compontens
OpenMesh::FaceHandle
Handle for a face entity.
Definition: Handles.hh:146
OpenMesh::BaseHandle::is_valid
bool is_valid() const
The handle is valid iff the index is not negative.
Definition: Handles.hh:77
OpenMesh
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:64
OpenMesh::BaseHandle::reset
void reset()
reset handle to be invalid
Definition: Handles.hh:80
OpenMesh::BaseHandle::idx
int idx() const
Get the underlying index of this handle.
Definition: Handles.hh:74
std
STL namespace.
OpenMesh::VertexHandle
Handle for a vertex entity.
Definition: Handles.hh:125
OpenMesh::BaseHandle::invalidate
void invalidate()
reset handle to be invalid
Definition: Handles.hh:82
OpenMesh::EdgeHandle
Handle for a edge entity.
Definition: Handles.hh:139
OpenMesh::BaseHandle
Base class for all handle types.
Definition: Handles.hh:67