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ModNormalDeviationT.hh
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41
42
46 //=============================================================================
47 //
48 // CLASS ModNormalDeviationT
49 //
50 //=============================================================================
51
52
53 #ifndef OPENMESH_DECIMATER_MODNORMALDEVIATIONT_HH
54 #define OPENMESH_DECIMATER_MODNORMALDEVIATIONT_HH
55
56
57 //== INCLUDES =================================================================
58
59 #include <OpenMesh/Tools/Decimater/ModBaseT.hh>
60 #include <OpenMesh/Core/Utils/Property.hh>
61 #include <OpenMesh/Core/Geometry/NormalConeT.hh>
62
63
64 //== NAMESPACES ===============================================================
65
66 namespace OpenMesh {
67 namespace Decimater {
68
69
70 //== CLASS DEFINITION =========================================================
71
72
87 template <class MeshT>
88 class ModNormalDeviationT : public ModBaseT< MeshT >
89 {
90 public:
91
92 DECIMATING_MODULE( ModNormalDeviationT, MeshT, NormalDeviation );
93
94 typedef typename Mesh::Scalar Scalar;
95 typedef typename Mesh::Point Point;
96 typedef typename Mesh::Normal Normal;
97 typedef typename Mesh::VertexHandle VertexHandle;
98 typedef typename Mesh::FaceHandle FaceHandle;
99 typedef typename Mesh::EdgeHandle EdgeHandle;
100 typedef NormalConeT<Scalar> NormalCone;
101
102
103
104 public:
105
107 ModNormalDeviationT(MeshT& _mesh, float _max_dev = 180.0)
108 : Base(_mesh, true), mesh_(Base::mesh())
109 {
110 set_normal_deviation(_max_dev);
111 mesh_.add_property(normal_cones_);
112
113 const bool mesh_has_normals = _mesh.has_face_normals();
114 _mesh.request_face_normals();
115
116 if (!mesh_has_normals)
117 {
118 omerr() << "Mesh has no face normals. Compute them automatically." << std::endl;
119 _mesh.update_face_normals();
120 }
121 }
122
123
125 ~ModNormalDeviationT() {
126 mesh_.remove_property(normal_cones_);
127 mesh_.release_face_normals();
128 }
129
130
132 Scalar normal_deviation() const {
133 return normal_deviation_ / M_PI * 180.0;
134 }
135
137 void set_normal_deviation(Scalar _s) {
138 normal_deviation_ = _s / static_cast<Scalar>(180.0) * static_cast<Scalar>(M_PI);
139 }
140
141
143 void initialize() {
144 if (!normal_cones_.is_valid())
145 mesh_.add_property(normal_cones_);
146
147 typename Mesh::FaceIter f_it = mesh_.faces_begin(),
148 f_end = mesh_.faces_end();
149
150 for (; f_it != f_end; ++f_it)
151 mesh_.property(normal_cones_, *f_it) = NormalCone(mesh_.normal(*f_it));
152 }
153
168 float collapse_priority(const CollapseInfo& _ci) {
169 // simulate collapse
170 mesh_.set_point(_ci.v0, _ci.p1);
171
172
173 typename Mesh::Scalar max_angle(0.0);
174 typename Mesh::ConstVertexFaceIter vf_it(mesh_, _ci.v0);
175 typename Mesh::FaceHandle fh, fhl, fhr;
176
177 if (_ci.v0vl.is_valid()) fhl = mesh_.face_handle(_ci.v0vl);
178 if (_ci.vrv0.is_valid()) fhr = mesh_.face_handle(_ci.vrv0);
179
180 for (; vf_it.is_valid(); ++vf_it) {
181 fh = *vf_it;
182 if (fh != _ci.fl && fh != _ci.fr) {
183 NormalCone nc = mesh_.property(normal_cones_, fh);
184
185 nc.merge(NormalCone(mesh_.calc_face_normal(fh)));
186 if (fh == fhl) nc.merge(mesh_.property(normal_cones_, _ci.fl));
187 if (fh == fhr) nc.merge(mesh_.property(normal_cones_, _ci.fr));
188
189 if (nc.angle() > max_angle) {
190 max_angle = nc.angle();
191 if (max_angle > 0.5 * normal_deviation_)
192 break;
193 }
194 }
195 }
196
197
198 // undo simulation changes
199 mesh_.set_point(_ci.v0, _ci.p0);
200
201
202 return (max_angle < 0.5 * normal_deviation_ ? max_angle : float( Base::ILLEGAL_COLLAPSE ));
203 }
204
206 void set_error_tolerance_factor(double _factor) {
207 if (_factor >= 0.0 && _factor <= 1.0) {
208 // the smaller the factor, the smaller normal_deviation_ gets
209 // thus creating a stricter constraint
210 // division by error_tolerance_factor_ is for normalization
211 Scalar normal_deviation = normal_deviation_ * static_cast<Scalar>( 180.0 / M_PI * _factor / this->error_tolerance_factor_);
212
213 set_normal_deviation(normal_deviation);
214 this->error_tolerance_factor_ = _factor;
215 }
216 }
217
218
219 void postprocess_collapse(const CollapseInfo& _ci) {
220 // account for changed normals
221 typename Mesh::VertexFaceIter vf_it(mesh_, _ci.v1);
222 for (; vf_it.is_valid(); ++vf_it)
223 mesh_.property(normal_cones_, *vf_it).
224 merge(NormalCone(mesh_.normal(*vf_it)));
225
226
227 // normal cones of deleted triangles
228 typename Mesh::FaceHandle fh;
229
230 if (_ci.vlv1.is_valid()) {
231 fh = mesh_.face_handle(mesh_.opposite_halfedge_handle(_ci.vlv1));
232 if (fh.is_valid())
233 mesh_.property(normal_cones_, fh).
234 merge(mesh_.property(normal_cones_, _ci.fl));
235 }
236
237 if (_ci.v1vr.is_valid()) {
238 fh = mesh_.face_handle(mesh_.opposite_halfedge_handle(_ci.v1vr));
239 if (fh.is_valid())
240 mesh_.property(normal_cones_, fh).
241 merge(mesh_.property(normal_cones_, _ci.fr));
242 }
243 }
244
245
246
247 private:
248
249 Mesh& mesh_;
250 Scalar normal_deviation_;
251 OpenMesh::FPropHandleT<NormalCone> normal_cones_;
252 };
253
254
255 //=============================================================================
256 } // END_NS_DECIMATER
257 } // END_NS_OPENMESH
258 //=============================================================================
259 #endif // OPENMESH_DECIMATER_MODNORMALDEVIATIONT_HH defined
260 //=============================================================================
261
OpenMesh::Decimater::ModNormalDeviationT::set_normal_deviation
void set_normal_deviation(Scalar _s)
Set normal deviation ( 0 .. 360 )
Definition: ModNormalDeviationT.hh:137
OpenMesh::Decimater::CollapseInfoT::v1vr
Mesh::HalfedgeHandle v1vr
Outer remaining halfedge of diamond spanned by v0, v1, vl, and vr.
Definition: CollapseInfoT.hh:103
OpenMesh::Decimater::ModBaseT
Base class for all decimation modules.
Definition: ModBaseT.hh:192
OpenMesh::FPropHandleT
Handle representing a face property.
Definition: Property.hh:524
OpenMesh::PolyMeshT::Scalar
Kernel::Scalar Scalar
Scalar type.
Definition: PolyMeshT.hh:110
OpenMesh::PolyMeshT::Normal
Kernel::Normal Normal
Normal type.
Definition: PolyMeshT.hh:114
OpenMesh::Decimater::ModNormalDeviationT::normal_deviation
Scalar normal_deviation() const
Get normal deviation ( 0 .. 360 )
Definition: ModNormalDeviationT.hh:132
OpenMesh::PolyMeshT::VertexFaceIter
Kernel::VertexFaceIter VertexFaceIter
Circulator.
Definition: PolyMeshT.hh:166
OpenMesh::Decimater::CollapseInfoT::p0
Mesh::Point p0
Position of removed vertex.
Definition: CollapseInfoT.hh:93
OpenMesh::NormalConeT::merge
void merge(const NormalConeT &)
merge _cone; this instance will then enclose both former cones
Definition: NormalConeT_impl.hh:118
OpenMesh::Decimater::ModNormalDeviationT::set_error_tolerance_factor
void set_error_tolerance_factor(double _factor)
set the percentage of normal deviation
Definition: ModNormalDeviationT.hh:206
OpenMesh::Decimater::ModNormalDeviationT::collapse_priority
float collapse_priority(const CollapseInfo &_ci)
Control normals when Decimating.
Definition: ModNormalDeviationT.hh:168
DECIMATING_MODULE
#define DECIMATING_MODULE(Classname, MeshT, Name)
Convenience macro, to be used in derived modules The macro defines the types.
Definition: ModBaseT.hh:149
OpenMesh::PolyMeshT::ConstVertexFaceIter
Kernel::ConstVertexFaceIter ConstVertexFaceIter
Circulator.
Definition: PolyMeshT.hh:176
OpenMesh::Decimater::CollapseInfoT::fr
Mesh::FaceHandle fr
Right face.
Definition: CollapseInfoT.hh:96
OpenMesh::PolyMeshT::VertexHandle
Kernel::VertexHandle VertexHandle
Handle for referencing the corresponding item.
Definition: PolyMeshT.hh:136
OpenMesh
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:59
OpenMesh::NormalConeT::angle
Scalar angle() const
returns size of cone (radius in radians)
Definition: NormalConeT.hh:108
ModBaseT.hh
Base class for all decimation modules.
OpenMesh::NormalConeT
/class NormalCone NormalCone.hh <ACG/Geometry/Types/NormalCone.hh>
Definition: NormalConeT.hh:81
OpenMesh::Decimater::ModNormalDeviationT::initialize
void initialize()
Allocate and init normal cones.
Definition: ModNormalDeviationT.hh:143
OpenMesh::PolyMeshT::Point
Kernel::Point Point
Coordinate type.
Definition: PolyMeshT.hh:112
OpenMesh::Decimater::CollapseInfoT::p1
Mesh::Point p1
Positions of remaining vertex.
Definition: CollapseInfoT.hh:94
OpenMesh::Decimater::CollapseInfoT::v1
Mesh::VertexHandle v1
Remaining vertex.
Definition: CollapseInfoT.hh:92
OpenMesh::Decimater::CollapseInfoT::vlv1
Mesh::HalfedgeHandle vlv1
Outer remaining halfedge of diamond spanned by v0, v1, vl, and vr.
Definition: CollapseInfoT.hh:103
OpenMesh::Decimater::CollapseInfoT::fl
Mesh::FaceHandle fl
Left face.
Definition: CollapseInfoT.hh:95
OpenMesh::Decimater::CollapseInfoT
Stores information about a halfedge collapse.
Definition: CollapseInfoT.hh:74
OpenMesh::Decimater::ModNormalDeviationT
Use Normal deviation to control decimation.
Definition: ModNormalDeviationT.hh:88
OpenMesh::Decimater::ModNormalDeviationT::ModNormalDeviationT
ModNormalDeviationT(MeshT &_mesh, float _max_dev=180.0)
Constructor.
Definition: ModNormalDeviationT.hh:107
OpenMesh::Decimater::ModNormalDeviationT::~ModNormalDeviationT
~ModNormalDeviationT()
Destructor.
Definition: ModNormalDeviationT.hh:125
OpenMesh::Decimater::CollapseInfoT::v0vl
Mesh::HalfedgeHandle v0vl
Outer remaining halfedge of diamond spanned by v0, v1, vl, and vr.
Definition: CollapseInfoT.hh:103
OpenMesh::Decimater::CollapseInfoT::v0
Mesh::VertexHandle v0
Vertex to be removed.
Definition: CollapseInfoT.hh:91
OpenMesh::Decimater::CollapseInfoT::vrv0
Mesh::HalfedgeHandle vrv0
Outer remaining halfedge of diamond spanned by v0, v1, vl, and vr.
Definition: CollapseInfoT.hh:103
OpenMesh::Decimater::ModNormalDeviationT::postprocess_collapse
void postprocess_collapse(const CollapseInfo &_ci)
After _from_vh has been collapsed into _to_vh, this method will be called.
Definition: ModNormalDeviationT.hh:219
OpenMesh::Decimater::ModBaseT::mesh
MeshT & mesh()
Access the mesh associated with the decimater.
Definition: ModBaseT.hh:277