Point Cloud Library (PCL)  1.14.1-dev
multi_grid_octree_data.h
1 /*
2 Copyright (c) 2006, Michael Kazhdan and Matthew Bolitho
3 All rights reserved.
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28 
29 #ifndef MULTI_GRID_OCTREE_DATA_INCLUDED
30 #define MULTI_GRID_OCTREE_DATA_INCLUDED
31 
32 #if defined __GNUC__
33 # pragma GCC system_header
34 #endif
35 
36 #define MISHA_DEBUG 1
37 
38 #define GRADIENT_DOMAIN_SOLUTION 1 // Given the constraint vector-field V(p), there are two ways to solve for the coefficients, x, of the indicator function
39 // with respect to the B-spline basis {B_i(p)}
40 // 1] Find x minimizing:
41 // || V(p) - \sum_i \nabla x_i B_i(p) ||^2
42 // which is solved by the system A_1x = b_1 where:
43 // A_1[i,j] = < \nabla B_i(p) , \nabla B_j(p) >
44 // b_1[i] = < \nabla B_i(p) , V(p) >
45 // 2] Formulate this as a Poisson equation:
46 // \sum_i x_i \Delta B_i(p) = \nabla \cdot V(p)
47 // which is solved by the system A_2x = b_2 where:
48 // A_2[i,j] = - < \Delta B_i(p) , B_j(p) >
49 // b_2[i] = - < B_i(p) , \nabla \cdot V(p) >
50 // Although the two system matrices should be the same (assuming that the B_i satisfy dirichlet/neumann boundary conditions)
51 // the constraint vectors can differ when V does not satisfy the Neumann boundary conditions:
52 // A_1[i,j] = \int_R < \nabla B_i(p) , \nabla B_j(p) >
53 // = \int_R [ \nabla \cdot ( B_i(p) \nabla B_j(p) ) - B_i(p) \Delta B_j(p) ]
54 // = \int_dR < N(p) , B_i(p) \nabla B_j(p) > + A_2[i,j]
55 // and the first integral is zero if either f_i is zero on the boundary dR or the derivative of B_i across the boundary is zero.
56 // However, for the constraints we have:
57 // b_1(i) = \int_R < \nabla B_i(p) , V(p) >
58 // = \int_R [ \nabla \cdot ( B_i(p) V(p) ) - B_i(p) \nabla \cdot V(p) ]
59 // = \int_dR < N(p) , B_i(p) V(p) > + b_2[i]
60 // In particular, this implies that if the B_i satisfy the Neumann boundary conditions (rather than Dirichlet),
61 // and V is not zero across the boundary, then the two constraints are different.
62 // Forcing the < V(p) , N(p) > = 0 on the boundary, by killing off the component of the vector-field in the normal direction
63 // (FORCE_NEUMANN_FIELD), makes the two systems equal, and the value of this flag should be immaterial.
64 // Note that under interpretation 1, we have:
65 // \sum_i b_1(i) = < \nabla \sum_ i B_i(p) , V(p) > = 0
66 // because the B_i's sum to one. However, in general, we could have
67 // \sum_i b_2(i) \neq 0.
68 // This could cause trouble because the constant functions are in the kernel of the matrix A, so CG will misbehave if the constraint
69 // has a non-zero DC term. (Again, forcing < V(p) , N(p) > = 0 along the boundary resolves this problem.)
70 
71 #define FORCE_NEUMANN_FIELD 1 // This flag forces the normal component across the boundary of the integration domain to be zero.
72 // This should be enabled if GRADIENT_DOMAIN_SOLUTION is not, so that CG doesn't run into trouble.
73 
74 
75 #include <unordered_map>
76 
77 #include "bspline_data.h"
78 
79 
80 namespace pcl
81 {
82  namespace poisson
83  {
84 
85  typedef float Real;
86  typedef float BSplineDataReal;
88 
89 
90 
91  class RootInfo
92  {
93  public:
94  const TreeOctNode* node;
95  int edgeIndex;
96  long long key;
97  };
98 
99  class VertexData
100  {
101  public:
102  static long long EdgeIndex( const TreeOctNode* node , int eIndex , int maxDepth , int index[DIMENSION] );
103  static long long EdgeIndex( const TreeOctNode* node , int eIndex , int maxDepth );
104  static long long FaceIndex( const TreeOctNode* node , int fIndex , int maxDepth,int index[DIMENSION] );
105  static long long FaceIndex( const TreeOctNode* node , int fIndex , int maxDepth );
106  static long long CornerIndex( int depth , const int offSet[DIMENSION] , int cIndex , int maxDepth , int index[DIMENSION] );
107  static long long CornerIndex( const TreeOctNode* node , int cIndex , int maxDepth , int index[DIMENSION] );
108  static long long CornerIndex( const TreeOctNode* node , int cIndex , int maxDepth );
109  static long long CenterIndex( int depth , const int offSet[DIMENSION] , int maxDepth , int index[DIMENSION] );
110  static long long CenterIndex( const TreeOctNode* node , int maxDepth , int index[DIMENSION] );
111  static long long CenterIndex( const TreeOctNode* node , int maxDepth );
112  static long long CornerIndexKey( const int index[DIMENSION] );
113  };
115  {
116  public:
118  int *nodeCount;
119  int maxDepth;
120  SortedTreeNodes( void );
121  ~SortedTreeNodes( void );
122  void set( TreeOctNode& root );
124  {
125  int idx[pcl::poisson::Cube::CORNERS] = {-1, -1, -1, -1, -1, -1, -1, -1};
126  CornerIndices( void ) = default;
127  int& operator[] ( int i ) { return idx[i]; }
128  const int& operator[] ( int i ) const { return idx[i]; }
129  };
131  {
132  CornerTableData( void ) { cCount=0; }
133  ~CornerTableData( void ) { clear(); }
134  void clear( void ) { cTable.clear() ; cCount = 0; }
135  CornerIndices& operator[] ( const TreeOctNode* node );
136  const CornerIndices& operator[] ( const TreeOctNode* node ) const;
137  CornerIndices& cornerIndices( const TreeOctNode* node );
138  const CornerIndices& cornerIndices( const TreeOctNode* node ) const;
139  int cCount;
140  std::vector< CornerIndices > cTable;
141  std::vector< int > offsets;
142  };
143  void setCornerTable( CornerTableData& cData , const TreeOctNode* rootNode , int depth , int threads ) const;
144  void setCornerTable( CornerTableData& cData , const TreeOctNode* rootNode , int threads ) const { setCornerTable( cData , rootNode , maxDepth-1 , threads ); }
145  void setCornerTable( CornerTableData& cData , int threads ) const { setCornerTable( cData , treeNodes[0] , maxDepth-1 , threads ); }
146  int getMaxCornerCount( const TreeOctNode* rootNode , int depth , int maxDepth , int threads ) const ;
147  struct EdgeIndices
148  {
149  int idx[pcl::poisson::Cube::EDGES] = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
150  EdgeIndices( void ) = default;
151  int& operator[] ( int i ) { return idx[i]; }
152  const int& operator[] ( int i ) const { return idx[i]; }
153  };
155  {
156  EdgeTableData( void ) { eCount=0; }
157  ~EdgeTableData( void ) { clear(); }
158  void clear( void ) { eTable.clear() , eCount=0; }
159  EdgeIndices& operator[] ( const TreeOctNode* node );
160  const EdgeIndices& operator[] ( const TreeOctNode* node ) const;
161  EdgeIndices& edgeIndices( const TreeOctNode* node );
162  const EdgeIndices& edgeIndices( const TreeOctNode* node ) const;
163  int eCount;
164  std::vector< EdgeIndices > eTable;
165  std::vector< int > offsets;
166  };
167  void setEdgeTable( EdgeTableData& eData , const TreeOctNode* rootNode , int depth , int threads );
168  void setEdgeTable( EdgeTableData& eData , const TreeOctNode* rootNode , int threads ) { setEdgeTable( eData , rootNode , maxDepth-1 , threads ); }
169  void setEdgeTable( EdgeTableData& eData , int threads ) { setEdgeTable( eData , treeNodes[0] , maxDepth-1 , threads ); }
170  int getMaxEdgeCount( const TreeOctNode* rootNode , int depth , int threads ) const ;
171  };
172 
174  {
175  public:
176  static int UseIndex;
178  union
179  {
180  int mcIndex;
181  struct
182  {
185  };
186  };
189 
190  TreeNodeData(void);
191  ~TreeNodeData(void);
192  };
193 
194  template< int Degree >
195  class Octree
196  {
197  SortedTreeNodes _sNodes;
198  int _minDepth;
199  bool _constrainValues;
200  std::vector< int > _pointCount;
201  struct PointData
202  {
204  Real weight;
205  Real value;
206  PointData( pcl::poisson::Point3D< Real > p , Real w , Real v=0 ) { position = p , weight = w , value = v; }
207  };
208  std::vector< PointData > _points;
209  TreeOctNode::NeighborKey3 neighborKey;
210  TreeOctNode::ConstNeighborKey3 neighborKey2;
211 
212  Real radius;
213  int width;
214  Real GetLaplacian( const int index[DIMENSION] ) const;
215  // Note that this is a slight misnomer. We're only taking the diveregence/Laplacian in the weak sense, so there is a change of sign.
216  Real GetLaplacian( const TreeOctNode* node1 , const TreeOctNode* node2 ) const;
217  Real GetDivergence( const TreeOctNode* node1 , const TreeOctNode* node2 , const pcl::poisson::Point3D<Real>& normal1 ) const;
218  Real GetDivergenceMinusLaplacian( const TreeOctNode* node1 , const TreeOctNode* node2 , Real value1 , const pcl::poisson::Point3D<Real>& normal1 ) const;
219  struct PointInfo
220  {
221  float splineValues[3][3];
222  float weightedValue;
223  };
224  Real GetValue( const PointInfo points[3][3][3] , const bool hasPoints[3][3] , const int d[3] ) const;
225 
226  class AdjacencyCountFunction
227  {
228  public:
229  int adjacencyCount;
230  void Function(const TreeOctNode* node1,const TreeOctNode* node2);
231  };
232  class AdjacencySetFunction{
233  public:
234  int *adjacencies,adjacencyCount;
235  void Function(const TreeOctNode* node1,const TreeOctNode* node2);
236  };
237 
238  class RefineFunction{
239  public:
240  int depth;
241  void Function(TreeOctNode* node1,const TreeOctNode* node2);
242  };
243  class FaceEdgesFunction
244  {
245  public:
246  int fIndex , maxDepth;
247  std::vector< std::pair< RootInfo , RootInfo > >* edges;
248  std::unordered_map< long long , std::pair< RootInfo , int > >* vertexCount;
249  void Function( const TreeOctNode* node1 , const TreeOctNode* node2 );
250  };
251 
252  int SolveFixedDepthMatrix( int depth , const SortedTreeNodes& sNodes , Real* subConstraints , bool showResidual , int minIters , double accuracy );
253  int SolveFixedDepthMatrix( int depth , const SortedTreeNodes& sNodes , Real* subConstraints , int startingDepth , bool showResidual , int minIters , double accuracy );
254 
255  void SetMatrixRowBounds( const TreeOctNode* node , int rDepth , const int rOff[3] , int& xStart , int& xEnd , int& yStart , int& yEnd , int& zStart , int& zEnd ) const;
256  int GetMatrixRowSize( const TreeOctNode::Neighbors5& neighbors5 ) const;
257  int GetMatrixRowSize( const TreeOctNode::Neighbors5& neighbors5 , int xStart , int xEnd , int yStart , int yEnd , int zStart , int zEnd ) const;
258  int SetMatrixRow( const TreeOctNode::Neighbors5& neighbors5 , pcl::poisson::MatrixEntry< float >* row , int offset , const double stencil[5][5][5] ) const;
259  int SetMatrixRow( const TreeOctNode::Neighbors5& neighbors5 , pcl::poisson::MatrixEntry< float >* row , int offset , const double stencil[5][5][5] , int xStart , int xEnd , int yStart , int yEnd , int zStart , int zEnd ) const;
260  void SetDivergenceStencil( int depth , pcl::poisson::Point3D< double > *stencil , bool scatter ) const;
261  void SetLaplacianStencil( int depth , double stencil[5][5][5] ) const;
262  template< class C , int N > struct Stencil{ C values[N][N][N]; };
263  void SetLaplacianStencils( int depth , Stencil< double , 5 > stencil[2][2][2] ) const;
264  void SetDivergenceStencils( int depth , Stencil< pcl::poisson::Point3D< double > , 5 > stencil[2][2][2] , bool scatter ) const;
265  void SetEvaluationStencils( int depth , Stencil< double , 3 > stencil1[8] , Stencil< double , 3 > stencil2[8][8] ) const;
266 
267  static void UpdateCoarserSupportBounds( const TreeOctNode* node , int& startX , int& endX , int& startY , int& endY , int& startZ , int& endZ );
268  void UpdateConstraintsFromCoarser( const TreeOctNode::NeighborKey5& neighborKey5 , TreeOctNode* node , Real* metSolution , const Stencil< double , 5 >& stencil ) const;
269  void SetCoarserPointValues( int depth , const SortedTreeNodes& sNodes , Real* metSolution );
270  Real WeightedCoarserFunctionValue( const TreeOctNode::NeighborKey3& neighborKey3 , const TreeOctNode* node , Real* metSolution ) const;
271  void UpSampleCoarserSolution( int depth , const SortedTreeNodes& sNodes , pcl::poisson::Vector< Real >& solution ) const;
272  void DownSampleFinerConstraints( int depth , SortedTreeNodes& sNodes ) const;
273  template< class C > void DownSample( int depth , const SortedTreeNodes& sNodes , C* constraints ) const;
274  template< class C > void UpSample( int depth , const SortedTreeNodes& sNodes , C* coefficients ) const;
275  int GetFixedDepthLaplacian( pcl::poisson::SparseSymmetricMatrix<float>& matrix , int depth , const SortedTreeNodes& sNodes , Real* subConstraints );
276  int GetRestrictedFixedDepthLaplacian( pcl::poisson::SparseSymmetricMatrix<float>& matrix , int depth , const int* entries , int entryCount , const TreeOctNode* rNode, Real radius , const SortedTreeNodes& sNodes , Real* subConstraints );
277 
278  void SetIsoCorners( Real isoValue , TreeOctNode* leaf , SortedTreeNodes::CornerTableData& cData , char* valuesSet , Real* values , TreeOctNode::ConstNeighborKey3& nKey , const Real* metSolution , const Stencil< double , 3 > stencil1[8] , const Stencil< double , 3 > stencil2[8][8] );
279  static int IsBoundaryFace( const TreeOctNode* node , int faceIndex , int subdivideDepth );
280  static int IsBoundaryEdge( const TreeOctNode* node , int edgeIndex , int subdivideDepth );
281  static int IsBoundaryEdge( const TreeOctNode* node , int dir , int x , int y , int subidivideDepth );
282 
283  // For computing the iso-surface there is a lot of re-computation of information across shared geometry.
284  // For function values we don't care so much.
285  // For edges we need to be careful so that the mesh remains water-tight
286  struct RootData : public SortedTreeNodes::CornerTableData , public SortedTreeNodes::EdgeTableData
287  {
288  // Edge to iso-vertex map
289  std::unordered_map< long long , int > boundaryRoots;
290  // Vertex to ( value , normal ) map
291  std::unordered_map< long long , std::pair< Real , pcl::poisson::Point3D< Real > > > *boundaryValues;
292  int* interiorRoots;
293  Real *cornerValues;
294  pcl::poisson::Point3D< Real >* cornerNormals;
295  char *cornerValuesSet , *cornerNormalsSet , *edgesSet;
296  };
297 
298  int SetBoundaryMCRootPositions( int sDepth , Real isoValue , RootData& rootData , pcl::poisson::CoredMeshData* mesh , int nonLinearFit );
299  int SetMCRootPositions( TreeOctNode* node , int sDepth , Real isoValue , TreeOctNode::ConstNeighborKey5& neighborKey5 , RootData& rootData ,
300  std::vector< pcl::poisson::Point3D< float > >* interiorPositions , pcl::poisson::CoredMeshData* mesh , const Real* metSolution , int nonLinearFit );
301 #if MISHA_DEBUG
302  int GetMCIsoTriangles( TreeOctNode* node , pcl::poisson::CoredMeshData* mesh , RootData& rootData ,
303  std::vector< pcl::poisson::Point3D< float > >* interiorPositions , int offSet , int sDepth , bool polygonMesh , std::vector< pcl::poisson::Point3D< float > >* barycenters );
304  static int AddTriangles( pcl::poisson::CoredMeshData* mesh , std::vector<pcl::poisson::CoredPointIndex>& edges , std::vector<pcl::poisson::Point3D<float> >* interiorPositions , int offSet , bool polygonMesh , std::vector< pcl::poisson::Point3D< float > >* barycenters );
305 #else // !MISHA_DEBUG
306  int GetMCIsoTriangles( TreeOctNode* node , pcl::poisson::CoredMeshData* mesh , RootData& rootData ,
307  std::vector< pcl::poisson::Point3D< float > >* interiorPositions , int offSet , int sDepth , bool addBarycenter , bool polygonMesh );
308  static int AddTriangles( pcl::poisson::CoredMeshData* mesh , std::vector<CoredPointIndex>& edges , std::vector<Point3D<float> >* interiorPositions , int offSet , bool addBarycenter , bool polygonMesh );
309 #endif // MISHA_DEBUG
310 
311 
312  void GetMCIsoEdges( TreeOctNode* node , int sDepth , std::vector< std::pair< RootInfo , RootInfo > >& edges );
313  static int GetEdgeLoops( std::vector< std::pair< RootInfo , RootInfo > >& edges , std::vector< std::vector< std::pair< RootInfo , RootInfo > > >& loops);
314  static int InteriorFaceRootCount( const TreeOctNode* node , const int &faceIndex , int maxDepth );
315  static int EdgeRootCount( const TreeOctNode* node , int edgeIndex , int maxDepth );
316  static void GetRootSpan( const RootInfo& ri , pcl::poisson::Point3D< float >& start , pcl::poisson::Point3D< float >& end );
317  int GetRoot( const RootInfo& ri , Real isoValue , TreeOctNode::ConstNeighborKey5& neighborKey5 , pcl::poisson::Point3D<Real> & position , RootData& rootData , int sDepth , const Real* metSolution , int nonLinearFit );
318  static int GetRootIndex( const TreeOctNode* node , int edgeIndex , int maxDepth , RootInfo& ri );
319  static int GetRootIndex( const TreeOctNode* node , int edgeIndex , int maxDepth , int sDepth , RootInfo& ri );
320  static int GetRootIndex( const RootInfo& ri , RootData& rootData , pcl::poisson::CoredPointIndex& index );
321  static int GetRootPair( const RootInfo& root , int maxDepth , RootInfo& pair );
322 
323  int NonLinearUpdateWeightContribution(TreeOctNode* node,const pcl::poisson::Point3D<Real>& position,Real weight=Real(1.0));
324  Real NonLinearGetSampleWeight(TreeOctNode* node,const pcl::poisson::Point3D<Real>& position);
325  void NonLinearGetSampleDepthAndWeight(TreeOctNode* node,const pcl::poisson::Point3D<Real>& position,Real samplesPerNode,Real& depth,Real& weight);
326  int NonLinearSplatOrientedPoint(TreeOctNode* node,const pcl::poisson::Point3D<Real>& point,const pcl::poisson::Point3D<Real>& normal);
327  Real NonLinearSplatOrientedPoint(const pcl::poisson::Point3D<Real>& point,const pcl::poisson::Point3D<Real>& normal , int kernelDepth , Real samplesPerNode , int minDepth , int maxDepth);
328 
329  int HasNormals(TreeOctNode* node,Real epsilon);
330  Real getCornerValue( const TreeOctNode::ConstNeighborKey3& neighborKey3 , const TreeOctNode* node , int corner , const Real* metSolution );
331  pcl::poisson::Point3D< Real > getCornerNormal( const TreeOctNode::ConstNeighborKey5& neighborKey5 , const TreeOctNode* node , int corner , const Real* metSolution );
332  Real getCornerValue( const TreeOctNode::ConstNeighborKey3& neighborKey3 , const TreeOctNode* node , int corner , const Real* metSolution , const double stencil1[3][3][3] , const double stencil2[3][3][3] );
333  Real getCenterValue( const TreeOctNode::ConstNeighborKey3& neighborKey3 , const TreeOctNode* node );
334  public:
335  int threads;
336  static double maxMemoryUsage;
337  static double MemoryUsage( void );
338  std::vector< pcl::poisson::Point3D<Real> >* normals;
342  Octree( void );
343 
344  void setBSplineData( int maxDepth , Real normalSmooth=-1 , bool reflectBoundary=false );
345  void finalize( void );
346  void RefineBoundary( int subdivisionDepth );
347  Real* GetWeightGrid( int& res , int depth=-1 );
348  Real* GetSolutionGrid( int& res , float isoValue=0.f , int depth=-1 );
349 
350  template<typename PointNT> int
351  setTree(typename pcl::PointCloud<PointNT>::ConstPtr input_ , int maxDepth , int minDepth ,
352  int kernelDepth , Real samplesPerNode , Real scaleFactor , Point3D<Real>& center , Real& scale ,
353  int useConfidence , Real constraintWeight , bool adaptiveWeights );
354 
355  void SetLaplacianConstraints(void);
356  void ClipTree(void);
357  int LaplacianMatrixIteration( int subdivideDepth , bool showResidual , int minIters , double accuracy );
358 
359  Real GetIsoValue(void);
360  void GetMCIsoTriangles( Real isoValue , int subdivideDepth , pcl::poisson::CoredMeshData* mesh , int fullDepthIso=0 , int nonLinearFit=1 , bool addBarycenter=false , bool polygonMesh=false );
361  };
362 
363 
364  }
365 }
366 
367 
368 
369 
370 #include "multi_grid_octree_data.hpp"
371 #endif // MULTI_GRID_OCTREE_DATA_INCLUDED
shared_ptr< const PointCloud< PointT > > ConstPtr
Definition: point_cloud.h:414
void RefineBoundary(int subdivisionDepth)
void setBSplineData(int maxDepth, Real normalSmooth=-1, bool reflectBoundary=false)
static double MemoryUsage(void)
int LaplacianMatrixIteration(int subdivideDepth, bool showResidual, int minIters, double accuracy)
Real * GetSolutionGrid(int &res, float isoValue=0.f, int depth=-1)
std::vector< pcl::poisson::Point3D< Real > > * normals
Real * GetWeightGrid(int &res, int depth=-1)
pcl::poisson::BSplineData< Degree, BSplineDataReal > fData
int setTree(typename pcl::PointCloud< PointNT >::ConstPtr input_, int maxDepth, int minDepth, int kernelDepth, Real samplesPerNode, Real scaleFactor, Point3D< Real > &center, Real &scale, int useConfidence, Real constraintWeight, bool adaptiveWeights)
void setEdgeTable(EdgeTableData &eData, const TreeOctNode *rootNode, int depth, int threads)
void setCornerTable(CornerTableData &cData, const TreeOctNode *rootNode, int threads) const
void setEdgeTable(EdgeTableData &eData, const TreeOctNode *rootNode, int threads)
int getMaxEdgeCount(const TreeOctNode *rootNode, int depth, int threads) const
void setCornerTable(CornerTableData &cData, int threads) const
int getMaxCornerCount(const TreeOctNode *rootNode, int depth, int maxDepth, int threads) const
void setEdgeTable(EdgeTableData &eData, int threads)
void setCornerTable(CornerTableData &cData, const TreeOctNode *rootNode, int depth, int threads) const
static long long CenterIndex(int depth, const int offSet[DIMENSION], int maxDepth, int index[DIMENSION])
static long long CornerIndex(int depth, const int offSet[DIMENSION], int cIndex, int maxDepth, int index[DIMENSION])
static long long FaceIndex(const TreeOctNode *node, int fIndex, int maxDepth, int index[DIMENSION])
static long long CornerIndexKey(const int index[DIMENSION])
static long long EdgeIndex(const TreeOctNode *node, int eIndex, int maxDepth, int index[DIMENSION])
pcl::poisson::OctNode< class TreeNodeData, Real > TreeOctNode
Definition: sparse_matrix.h:46
CornerIndices & operator[](const TreeOctNode *node)
CornerIndices & cornerIndices(const TreeOctNode *node)
EdgeIndices & operator[](const TreeOctNode *node)
EdgeIndices & edgeIndices(const TreeOctNode *node)