DGtal::CellGeometryFunctions< TKSpace, 2, 2 > Struct Template Reference

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

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

Public Member Functions
	BOOST_CONCEPT_ASSERT ((concepts::CCellularGridSpaceND< TKSpace >))
	BOOST_STATIC_ASSERT (TKSpace::dimension==2)

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>
struct DGtal::CellGeometryFunctions< TKSpace, 2, 2 >

Specialization for 2-cells in 2D.

Template Parameters

TKSpace

an arbitrary model of CCellularGridSpaceND.

Definition at line 714 of file CellGeometry.h.

Member Typedef Documentation

Cell

template<typename TKSpace >

typedef KSpace::Cell DGtal::CellGeometryFunctions< TKSpace, 2, 2 >::Cell

Definition at line 720 of file CellGeometry.h.

KSpace

template<typename TKSpace >

typedef TKSpace DGtal::CellGeometryFunctions< TKSpace, 2, 2 >::KSpace

Definition at line 718 of file CellGeometry.h.

Space

template<typename TKSpace >

typedef KSpace::Space DGtal::CellGeometryFunctions< TKSpace, 2, 2 >::Space

Definition at line 719 of file CellGeometry.h.

Member Function Documentation

BOOST_CONCEPT_ASSERT()

template<typename TKSpace >

DGtal::CellGeometryFunctions< TKSpace, 2, 2 >::BOOST_CONCEPT_ASSERT

(

(concepts::CCellularGridSpaceND< TKSpace >)

)

BOOST_STATIC_ASSERT()

template<typename TKSpace >

DGtal::CellGeometryFunctions< TKSpace, 2, 2 >::BOOST_STATIC_ASSERT

(

TKSpace::dimension

= =2

)

getIncidentCellsToPointels()

template<typename TKSpace >

template<typename PointelIterator >

static std::unordered_set< typename KSpace::Cell > DGtal::CellGeometryFunctions< TKSpace, 2, 2 >::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 2-cells to the given range of pointels [itB, itE).

Definition at line 730 of file CellGeometry.h.

    {
      std::unordered_set<typename KSpace::Cell> cells;
      for ( auto it = itB; it != itE; ++it )
        {
          auto pointel = *it;
          auto linelxp = K.uIncident( pointel, 0, true );
          auto linelxm = K.uIncident( pointel, 0, false );
          cells.insert( K.uIncident( linelxp, 1, true ) );
          cells.insert( K.uIncident( linelxp, 1, false ) );
          cells.insert( K.uIncident( linelxm, 1, true ) );
          cells.insert( K.uIncident( linelxm, 1, false ) );
        }
      return cells;
    }

References K.

getIncidentCellsToPoints()

template<typename TKSpace >

template<typename PointIterator >

static std::unordered_set< typename KSpace::Cell > DGtal::CellGeometryFunctions< TKSpace, 2, 2 >::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 2-cells to the given range of points [itB, itE).

Note

General method. Note as efficient as specializations.

Definition at line 756 of file CellGeometry.h.

    {
      std::cout << "<2,2> specialization" << std::endl;
      std::unordered_set<typename KSpace::Cell> cells;
      for ( auto it = itB; it != itE; ++it )
        {
          auto pointel = K.uPointel( *it );
          auto linelxp = K.uIncident( pointel, 0, true );
          auto linelxm = K.uIncident( pointel, 0, false );
          cells.insert( K.uIncident( linelxp, 1, true ) );
          cells.insert( K.uIncident( linelxp, 1, false ) );
          cells.insert( K.uIncident( linelxm, 1, true ) );
          cells.insert( K.uIncident( linelxm, 1, false ) );
        }
      return cells;
    }

References K.

getIncidentKPointsToPoints()

template<typename TKSpace >

template<typename PointIterator >

static UnorderedSetByBlock< typename KSpace::Point, Splitter< typename KSpace::Point, uint64_t > > DGtal::CellGeometryFunctions< TKSpace, 2, 2 >::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 2-kpoints to the given range of points [itB, itE).

Definition at line 783 of file CellGeometry.h.

    {
      UnorderedSetByBlock< typename KSpace::Point,
                           Splitter< typename KSpace::Point, uint64_t> > kpoints;
      for ( auto it = itB; it != itE; ++it )
        {
          auto kp = K.uKCoords( K.uPointel( *it ) );
          kpoints.emplace( kp[ 0 ] - 1, kp[ 1 ] - 1 );
          kpoints.emplace( kp[ 0 ] + 1, kp[ 1 ] - 1 );
          kpoints.emplace( kp[ 0 ] - 1, kp[ 1 ] + 1 );
          kpoints.emplace( kp[ 0 ] + 1, kp[ 1 ] + 1 );
        }
      return kpoints;
    }

References K.

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

• CellGeometry.h