DGtal::CellGeometryFunctions< TKSpace, i, N > Struct Template Reference

#include <DGtal/geometry/volumes/CellGeometry.h>

Public Types
typedef TKSpace	KSpace
typedef KSpace::Space	Space
typedef KSpace::Cell	Cell
typedef KSpace::Point	Point

Public Member Functions
	BOOST_CONCEPT_ASSERT ((concepts::CCellularGridSpaceND< TKSpace >))

Static Public Member Functions
template<typename PointelIterator >
static std::unordered_set< typename KSpace::Cell >	getIncidentCellsToPointels (const KSpace &K, PointelIterator itB, PointelIterator itE)
template<typename PointIterator >
static std::unordered_set< typename KSpace::Cell >	getIncidentCellsToPoints (const KSpace &K, PointIterator itB, PointIterator itE)
template<typename PointIterator >
static UnorderedSetByBlock< typename KSpace::Point, Splitter< typename KSpace::Point, uint64_t > >	getIncidentKPointsToPoints (const KSpace &K, PointIterator itB, PointIterator itE)

Detailed Description

template<typename TKSpace, int i, int N>
struct DGtal::CellGeometryFunctions< TKSpace, i, N >

Utility class gathering some useful functions related to cell geometry and digital or cell convexity. It is meant to be specialized for low dimensions.

Template Parameters

TKSpace	an arbitrary model of CCellularGridSpaceND.
i	the integer specifying the dimension of cells.
N	the integer specifying the dimension of the digital space.

Definition at line 441 of file CellGeometry.h.

Member Typedef Documentation

Cell

template<typename TKSpace , int i, int N>

typedef KSpace::Cell DGtal::CellGeometryFunctions< TKSpace, i, N >::Cell

Definition at line 446 of file CellGeometry.h.

KSpace

template<typename TKSpace , int i, int N>

typedef TKSpace DGtal::CellGeometryFunctions< TKSpace, i, N >::KSpace

Definition at line 444 of file CellGeometry.h.

Point

template<typename TKSpace , int i, int N>

typedef KSpace::Point DGtal::CellGeometryFunctions< TKSpace, i, N >::Point

Definition at line 447 of file CellGeometry.h.

Space

template<typename TKSpace , int i, int N>

typedef KSpace::Space DGtal::CellGeometryFunctions< TKSpace, i, N >::Space

Definition at line 445 of file CellGeometry.h.

Member Function Documentation

BOOST_CONCEPT_ASSERT()

template<typename TKSpace , int i, int N>

DGtal::CellGeometryFunctions< TKSpace, i, N >::BOOST_CONCEPT_ASSERT

(

(concepts::CCellularGridSpaceND< TKSpace >)

)

getIncidentCellsToPointels()

template<typename TKSpace , int i, int N>

template<typename PointelIterator >

static std::unordered_set< typename KSpace::Cell > DGtal::CellGeometryFunctions< TKSpace, i, N >::getIncidentCellsToPointels ( const KSpace &  K, PointelIterator  itB, PointelIterator  itE  )

inlinestatic

Template Parameters

PointelIterator

any model of forward iterator on pointels.

Parameters

K	a valid cellular grid space large enough to hold the cells.
itB	the start of a range of pointels.
itE	past the end of a range of pointels.

Returns

the incident i-cells to the given range of pointels [itB, itE).

Note

General method. Note as efficient as specializations.

Definition at line 458 of file CellGeometry.h.

    {
      std::unordered_set<typename KSpace::Cell> cells;
      if ( i == 0 )
        for ( auto it = itB; it != itE; ++it )
          cells.insert( *it );
      else
        for ( auto it = itB; it != itE; ++it )
          {
            auto pointel = *it;
            auto cofaces = K.uCoFaces( pointel );
            for ( auto&& f : cofaces )
              if ( K.uDim( f ) == i ) cells.insert( f );
          }
      return cells;
    }

References K.

getIncidentCellsToPoints()

template<typename TKSpace , int i, int N>

template<typename PointIterator >

static std::unordered_set< typename KSpace::Cell > DGtal::CellGeometryFunctions< TKSpace, i, N >::getIncidentCellsToPoints ( const KSpace &  K, PointIterator  itB, PointIterator  itE  )

inlinestatic

Template Parameters

PointIterator

any model of forward iterator on points.

Parameters

K	a valid cellular grid space large enough to hold the cells.
itB	the start of a range of points.
itE	past the end of a range of points.

Returns

the incident i-cells to the given range of points [itB, itE).

Note

General method. Note as efficient as specializations.

Definition at line 485 of file CellGeometry.h.

    {
      std::unordered_set<typename KSpace::Cell> cells;
      if ( i == 0 )
        for ( auto it = itB; it != itE; ++it )
          cells.insert( K.uPointel( *it ) );
      else
        for ( auto it = itB; it != itE; ++it )
          {
            auto pointel = K.uPointel( *it );
            auto cofaces = K.uCoFaces( pointel );
            for ( auto&& f : cofaces )
              if ( K.uDim( f ) == i ) cells.insert( f );
          }
      return cells;
    }

References K.

getIncidentKPointsToPoints()

template<typename TKSpace , int i, int N>

template<typename PointIterator >

static UnorderedSetByBlock< typename KSpace::Point, Splitter< typename KSpace::Point, uint64_t > > DGtal::CellGeometryFunctions< TKSpace, i, N >::getIncidentKPointsToPoints ( const KSpace &  K, PointIterator  itB, PointIterator  itE  )

inlinestatic

Template Parameters

PointIterator

any model of forward iterator on points.

Parameters

K	a valid cellular grid space large enough to hold the cells.
itB	the start of a range of points.
itE	past the end of a range of points.

Returns

the incident i-kpoints to the given range of points [itB, itE).

Note

General method. Note as efficient as specializations.

Definition at line 513 of file CellGeometry.h.

    {
      UnorderedSetByBlock< typename KSpace::Point,
                           Splitter< typename KSpace::Point, uint64_t > > kpoints;
      if ( i == 0 )
        for ( auto it = itB; it != itE; ++it )
          kpoints.insert( K.uKCoords( K.uPointel( *it ) ) );
      else
        for ( auto it = itB; it != itE; ++it )
          {
            auto pointel = K.uPointel( *it );
            auto cofaces = K.uCoFaces( pointel );
            for ( auto&& f : cofaces )
              if ( K.uDim( f ) == i ) kpoints.insert( K.uKCoords( f ) );
          }
      return kpoints;
    }

References K.

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The documentation for this struct was generated from the following file:

• CellGeometry.h