OpenMesh: OpenMesh/Tools/Decimater/ModQuadricT_impl.hh Source File

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ModQuadricT_impl.hh
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43
48 //=============================================================================
49 //
50 // CLASS ModQuadric - IMPLEMENTATION
51 //
52 //=============================================================================
53
54 #define OPENMESH_DECIMATER_MODQUADRIC_CC
55
56 //== INCLUDES =================================================================
57
58 #include <OpenMesh/Tools/Decimater/ModQuadricT.hh>
59
60
61 //== NAMESPACE ===============================================================
62
63 namespace OpenMesh { // BEGIN_NS_OPENMESH
64 namespace Decimater { // BEGIN_NS_DECIMATER
65
66
67 //== IMPLEMENTATION ==========================================================
68
69
70 template<class DecimaterType>
71 void
72 ModQuadricT<DecimaterType>::
73 initialize()
74 {
75 using Geometry::Quadricd;
76 // alloc quadrics
77 if (!quadrics_.is_valid())
78 Base::mesh().add_property( quadrics_ );
79
80 // clear quadrics
81 typename Mesh::VertexIter v_it = Base::mesh().vertices_begin(),
82 v_end = Base::mesh().vertices_end();
83
84 for (; v_it != v_end; ++v_it)
85 Base::mesh().property(quadrics_, *v_it).clear();
86
87 // calc (normal weighted) quadric
88 typename Mesh::FaceIter f_it = Base::mesh().faces_begin(),
89 f_end = Base::mesh().faces_end();
90
91 typename Mesh::FaceVertexIter fv_it;
92 typename Mesh::VertexHandle vh0, vh1, vh2;
93 typedef Vec3d Vec3;
94
95 for (; f_it != f_end; ++f_it)
96 {
97 fv_it = Base::mesh().fv_iter(*f_it);
98 vh0 = *fv_it; ++fv_it;
99 vh1 = *fv_it; ++fv_it;
100 vh2 = *fv_it;
101
102 Vec3 v0, v1, v2;
103 {
104 using namespace OpenMesh;
105
106 v0 = vector_cast<Vec3>(Base::mesh().point(vh0));
107 v1 = vector_cast<Vec3>(Base::mesh().point(vh1));
108 v2 = vector_cast<Vec3>(Base::mesh().point(vh2));
109 }
110
111 Vec3 n = (v1-v0) % (v2-v0);
112 double area = n.norm();
113 if (area > FLT_MIN)
114 {
115 n /= area;
116 area *= 0.5;
117 }
118
119 const double a = n[0];
120 const double b = n[1];
121 const double c = n[2];
122 const double d = -(vector_cast<Vec3>(Base::mesh().point(vh0))|n);
123
124 Quadricd q(a, b, c, d);
125 q *= area;
126
127 Base::mesh().property(quadrics_, vh0) += q;
128 Base::mesh().property(quadrics_, vh1) += q;
129 Base::mesh().property(quadrics_, vh2) += q;
130 }
131 }
132
133 //-----------------------------------------------------------------------------
134
135 template<class MeshT>
136 void ModQuadricT<MeshT>::set_error_tolerance_factor(double _factor) {
137 if (this->is_binary()) {
138 if (_factor >= 0.0 && _factor <= 1.0) {
139 // the smaller the factor, the smaller max_err_ gets
140 // thus creating a stricter constraint
141 // division by error_tolerance_factor_ is for normalization
142 double max_err = max_err_ * _factor / this->error_tolerance_factor_;
143 set_max_err(max_err);
144 this->error_tolerance_factor_ = _factor;
145
146 initialize();
147 }
148 }
149 }
150
151 //=============================================================================
152 } // END_NS_DECIMATER
153 } // END_NS_OPENMESH
154 //=============================================================================
ModQuadricT.hh
OpenMesh
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:59
OpenMesh::Geometry::QuadricT
/class QuadricT Geometry/QuadricT.hh
Definition: QuadricT.hh:83
OpenMesh::Geometry::QuadricT::clear
void clear()
set all entries to zero
Definition: QuadricT.hh:166
OpenMesh::VectorT
Definition: Vector11T.hh:83
OpenMesh::PolyMeshT::VertexHandle
Kernel::VertexHandle VertexHandle
Handle for referencing the corresponding item.
Definition: PolyMeshT.hh:136
OpenMesh::PolyMeshT::FaceIter
Kernel::FaceIter FaceIter
Scalar type.
Definition: PolyMeshT.hh:146
OpenMesh::PolyMeshT::FaceVertexIter
Kernel::FaceVertexIter FaceVertexIter
Circulator.
Definition: PolyMeshT.hh:167
OpenMesh::PolyMeshT::VertexIter
Kernel::VertexIter VertexIter
Scalar type.
Definition: PolyMeshT.hh:143
OpenMesh::Decimater::ModQuadricT::set_error_tolerance_factor
void set_error_tolerance_factor(double _factor) override
set the percentage of maximum quadric error
Definition: ModQuadricT_impl.hh:136
OpenMesh::Decimater::ModQuadricT::initialize
virtual void initialize(void) override
Initalize the module and prepare the mesh for decimation.
Definition: ModQuadricT_impl.hh:73