Developer Documentation

VHierarchyWindow.cc
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41
42
43
44 //=============================================================================
45 //
46 // CLASS newClass - IMPLEMENTATION
47 //
48 //=============================================================================
49
50
51 //== INCLUDES =================================================================
52
53 #include <OpenMesh/Tools/VDPM/VHierarchyWindow.hh>
54
55 #include <cstring>
56
57 #ifndef WIN32
58 #else
59 #if defined(__MINGW32__)
60 #include <stdlib.h>
61 #include <string.h>
62 #endif
63 #endif
64
65 //== NAMESPACES ===============================================================
66
67 namespace OpenMesh {
68 namespace VDPM {
69
70
71 //== IMPLEMENTATION ==========================================================
72
73
74 VHierarchyWindow::
75 VHierarchyWindow() :
76 vhierarchy_(nullptr), buffer_(nullptr),buffer_min_ (0), buffer_max_(0), current_pos_(0) , window_min_(0), window_max_(0), n_shift_(0)
77 {
78
79 }
80
81
82 VHierarchyWindow::
83 VHierarchyWindow(VHierarchy &_vhierarchy) :
84 vhierarchy_(&_vhierarchy),buffer_(nullptr),buffer_min_ (0), buffer_max_(0), current_pos_(0) , window_min_(0), window_max_(0) ,n_shift_(0)
85 {
86 }
87
88
89 VHierarchyWindow::
90 ~VHierarchyWindow(void)
91 {
92 if (buffer_ != nullptr)
93 free(buffer_);
94 }
95
96
97 bool
98 VHierarchyWindow::
99 update_buffer(VHierarchyNodeHandle _node_handle)
100 {
101 if (underflow(_node_handle) != true && overflow(_node_handle) != true)
102 return false;
103
104 // tightly update window_min_ & window_max_
105 int none_zero_pos;
106 for (none_zero_pos=int(buffer_size()-1); none_zero_pos >= 0; --none_zero_pos)
107 {
108 if (buffer_[none_zero_pos] != 0) break;
109 }
110 window_max_ = buffer_min_ + none_zero_pos + 1;
111 for(none_zero_pos=0; none_zero_pos < int(buffer_size()); ++none_zero_pos)
112 {
113 if (buffer_[none_zero_pos] != 0) break;
114 }
115 window_min_ = buffer_min_ + none_zero_pos;
116
117 assert(window_min_ < window_max_);
118
119 while (underflow(_node_handle) == true) buffer_min_ /= 2;
120 while (overflow(_node_handle) == true)
121 {
122 buffer_max_ *= 2;
123 if (buffer_max_ > vhierarchy_->num_nodes() / 8)
124 buffer_max_ = 1 + vhierarchy_->num_nodes() / 8;
125 }
126
127 unsigned char *new_buffer = (unsigned char *) malloc(buffer_size());
128 memset(new_buffer, 0, buffer_size());
129 memcpy(&(new_buffer[window_min_-buffer_min_]),
130 &(buffer_[none_zero_pos]),
131 window_size());
132 free(buffer_);
133 buffer_ = new_buffer;
134
135 return true;
136 }
137
138 void
139 VHierarchyWindow::init(VHierarchyNodeHandleContainer &_roots)
140 {
141 if (buffer_ != nullptr)
142 free(buffer_);
143
144 buffer_min_ = 0;
145 buffer_max_ = _roots.size() / 8;
146 if (_roots.size() % 8 > 0)
147 ++buffer_max_;
148
149 buffer_ = (unsigned char *) malloc(buffer_size());
150 memset(buffer_, 0, buffer_size());
151
152 window_min_ = 0;
153 window_max_= 0;
154 current_pos_ = 0;
155 n_shift_ = 0;
156
157 for (unsigned int i=0; i<_roots.size(); i++)
158 {
159 activate(VHierarchyNodeHandle((int) i));
160 }
161 }
162
163
164 void
165 VHierarchyWindow::
166 update_with_vsplit(VHierarchyNodeHandle _parent_handle)
167 {
168 VHierarchyNodeHandle
169 lchild_handle = vhierarchy_->lchild_handle(_parent_handle),
170 rchild_handle = vhierarchy_->rchild_handle(_parent_handle);
171
172 assert(is_active(_parent_handle) == true);
173 assert(is_active(lchild_handle) != true);
174 assert(is_active(rchild_handle) != true);
175
176 inactivate(_parent_handle);
177 activate(rchild_handle);
178 activate(lchild_handle);
179 }
180
181 void
182 VHierarchyWindow::
183 update_with_ecol(VHierarchyNodeHandle _parent_handle)
184 {
185 VHierarchyNodeHandle
186 lchild_handle = vhierarchy_->lchild_handle(_parent_handle),
187 rchild_handle = vhierarchy_->rchild_handle(_parent_handle);
188
189 assert(is_active(_parent_handle) != true);
190 assert(is_active(lchild_handle) == true);
191 assert(is_active(rchild_handle) == true);
192
193 activate(_parent_handle);
194 inactivate(rchild_handle);
195 inactivate(lchild_handle);
196 }
197
198 //=============================================================================
199 } // namespace VDPM
200 } // namespace OpenMesh
201 //=============================================================================
OpenMesh
Definition: MeshItems.hh:59
OpenMesh::VDPM::VHierarchyNodeHandleContainer
std::vector< VHierarchyNodeHandle > VHierarchyNodeHandleContainer
Container for vertex hierarchy node handles.
Definition: VHierarchyNode.hh:183