DGtal  1.3.beta
Public Types | Public Member Functions | Static Public Member Functions
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::CellgetIncidentCellsToPointels (const KSpace &K, PointelIterator itB, PointelIterator itE)
 
template<typename PointIterator >
static std::unordered_set< typename KSpace::CellgetIncidentCellsToPoints (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
TKSpacean arbitrary model of CCellularGridSpaceND.

Definition at line 706 of file CellGeometry.h.

Member Typedef Documentation

◆ Cell

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

Definition at line 712 of file CellGeometry.h.

◆ KSpace

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

Definition at line 710 of file CellGeometry.h.

◆ Space

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

Definition at line 711 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
PointelIteratorany model of forward iterator on pointels.
Parameters
Ka valid cellular grid space large enough to hold the cells.
itBthe start of a range of pointels.
itEpast the end of a range of pointels.
Returns
the incident 2-cells to the given range of pointels [itB, itE).

Definition at line 722 of file CellGeometry.h.

724  {
725  std::unordered_set<typename KSpace::Cell> cells;
726  for ( auto it = itB; it != itE; ++it )
727  {
728  auto pointel = *it;
729  auto linelxp = K.uIncident( pointel, 0, true );
730  auto linelxm = K.uIncident( pointel, 0, false );
731  cells.insert( K.uIncident( linelxp, 1, true ) );
732  cells.insert( K.uIncident( linelxp, 1, false ) );
733  cells.insert( K.uIncident( linelxm, 1, true ) );
734  cells.insert( K.uIncident( linelxm, 1, false ) );
735  }
736  return cells;
737  }

References K, and DGtal::KhalimskySpaceND< dim, TInteger >::uIncident().

◆ 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
PointIteratorany model of forward iterator on points.
Parameters
Ka valid cellular grid space large enough to hold the cells.
itBthe start of a range of points.
itEpast 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 748 of file CellGeometry.h.

750  {
751  std::cout << "<2,2> specialization" << std::endl;
752  std::unordered_set<typename KSpace::Cell> cells;
753  for ( auto it = itB; it != itE; ++it )
754  {
755  auto pointel = K.uPointel( *it );
756  auto linelxp = K.uIncident( pointel, 0, true );
757  auto linelxm = K.uIncident( pointel, 0, false );
758  cells.insert( K.uIncident( linelxp, 1, true ) );
759  cells.insert( K.uIncident( linelxp, 1, false ) );
760  cells.insert( K.uIncident( linelxm, 1, true ) );
761  cells.insert( K.uIncident( linelxm, 1, false ) );
762  }
763  return cells;
764  }

References K, DGtal::KhalimskySpaceND< dim, TInteger >::uIncident(), and DGtal::KhalimskySpaceND< dim, TInteger >::uPointel().

◆ 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
PointIteratorany model of forward iterator on points.
Parameters
Ka valid cellular grid space large enough to hold the cells.
itBthe start of a range of points.
itEpast the end of a range of points.
Returns
the incident 2-kpoints to the given range of points [itB, itE).

Definition at line 775 of file CellGeometry.h.

777  {
778  UnorderedSetByBlock< typename KSpace::Point,
779  Splitter< typename KSpace::Point, uint64_t> > kpoints;
780  for ( auto it = itB; it != itE; ++it )
781  {
782  auto kp = K.uKCoords( K.uPointel( *it ) );
783  kpoints.emplace( kp[ 0 ] - 1, kp[ 1 ] - 1 );
784  kpoints.emplace( kp[ 0 ] + 1, kp[ 1 ] - 1 );
785  kpoints.emplace( kp[ 0 ] - 1, kp[ 1 ] + 1 );
786  kpoints.emplace( kp[ 0 ] + 1, kp[ 1 ] + 1 );
787  }
788  return kpoints;
789  }

References K, DGtal::KhalimskySpaceND< dim, TInteger >::uKCoords(), and DGtal::KhalimskySpaceND< dim, TInteger >::uPointel().


The documentation for this struct was generated from the following file:
K
KSpace K
Definition: testCubicalComplex.cpp:62
DGtal::KhalimskySpaceND::Point
PointVector< dim, Integer > Point
Definition: KhalimskySpaceND.h:425
DGtal::KhalimskySpaceND::uKCoords
const Point & uKCoords(const Cell &c) const
Return its Khalimsky coordinates.
DGtal::KhalimskySpaceND::uIncident
Cell uIncident(const Cell &c, Dimension k, bool up) const
Return the forward or backward unsigned cell incident to [c] along axis [k], depending on [up].
DGtal::KhalimskySpaceND::uPointel
Cell uPointel(Point p) const
From the digital coordinates of a point in Zn, builds the corresponding pointel (cell of dimension 0)...