CGAL::Point_set_with_structure< Kernel > Class Template Reference

#include <CGAL/structure_point_set.h>

Definition

A 3D point set with structure information based on a set of detected planes.

Given a point set in 3D space along with a set of fitted planes, this class stores a simplified and structured version of the point set. Each output point is assigned to one, two or more primitives (depending whether it belongs to a planar section, an edge or a if it is a vertex). The implementation follow [6].

Template Parameters

Kernel

a model of EfficientRANSACTraits that must provide in addition a function Intersect_3 intersection_3_object() const and a functor Intersect_3 with: boost::optional< boost::variant< Traits::Plane_3, Traits::Line_3 > > operator()(typename Traits::Plane_3, typename Traits::Plane_3) boost::optional< boost::variant< Traits::Line_3, Traits::Point_3 > > operator()(typename Traits::Line_3, typename Traits::Plane_3)

Public Types
enum	Coherence_type {   INCOHERENT = -1, FREEFORM = 0, VERTEX = 1, CREASE = 2,   PLANAR = 3 }
	Tag classifying the coherence of a triplet of points with respect to an inferred surface. More...
typedef Kernel::Point_3	Point
typedef Kernel::Vector_3	Vector
typedef Kernel::Plane_3	Plane

Public Member Functions
template<typename PointRange , typename PlaneRange , typename NamedParameters >
	Point_set_with_structure (const PointRange &points, const PlaneRange &planes, double epsilon, const NamedParameters &np)
	Constructs a structured point set based on the input points and the associated shape detection object. More...
std::size_t	size () const
std::pair< Point, Vector >	operator[] (std::size_t i) const
const Point &	point (std::size_t i) const
const Vector &	normal (std::size_t i) const
template<typename OutputIterator >
void	adjacency (std::size_t i, OutputIterator output) const
	Returns all Plane_shape objects that are adjacent to the point with index i. More...
Coherence_type	facet_coherence (const std::array< std::size_t, 3 > &f) const
	Computes the coherence of a facet between the 3 points indexed by f with respect to the underlying structure.

Member Enumeration Documentation

Coherence_type

template<typename Kernel >

enum CGAL::Point_set_with_structure::Coherence_type

Tag classifying the coherence of a triplet of points with respect to an inferred surface.

Enumerator
INCOHERENT	Incoherent (facet violates the underlying structure)
FREEFORM	Free-form coherent (facet is between 3 free-form points)
VERTEX	Structure coherent, facet adjacent to a vertex.
CREASE	Structure coherent, facet adjacent to an edge.
PLANAR	Structure coherent, facet inside a planar section.

Constructor & Destructor Documentation

Point_set_with_structure()

template<typename Kernel >

template<typename PointRange , typename PlaneRange , typename NamedParameters >

CGAL::Point_set_with_structure< Kernel >::Point_set_with_structure	(	const PointRange &	points,
		const PlaneRange &	planes,
		double	epsilon,
		const NamedParameters &	np
	)

Constructs a structured point set based on the input points and the associated shape detection object.

Template Parameters

PointRange	is a model of ConstRange. The value type of its iterator is the key type of the named parameter point_map.
PlaneRange	is a model of ConstRange. The value type of its iterator is the key type of the named parameter plane_map.

Parameters

points	input point range.
planes	input plane range.
epsilon	size parameter.
np	an optional sequence of Named Parameters among the ones listed below

Optional Named Parameters

point_map a property map associating points to the elements of the point set points Type: a model of ReadablePropertyMap whose key type is the value type of the iterator of PointRange and whose value type is geom_traits::Point_3 Default: CGAL::Identity_property_map<geom_traits::Point_3>
normal_map a property map associating normals to the elements of the point set points Type: a model of ReadablePropertyMap whose key type is the value type of the iterator of PointRange and whose value type is geom_traits::Vector_3
plane_index_map a property map associating the index of a point in the input range to the index of plane (-1 if the point is not assigned to a plane) Type: a class model of ReadablePropertyMap with std::size_t as key type and int as value type Default: unused
plane_map a property map containing the planes associated to the elements of the plane range planes Type: a class model of ReadablePropertyMap with PlaneRange::iterator::value_type as key type and geom_traits::Plane_3 as value type Default: CGAL::Identity_property_map<Kernel::Plane_3>
attraction_factor multiple of a tolerance epsilon used to connect simplices Type: floating scalar value Default: 3

Member Function Documentation

adjacency()

template<typename Kernel >

template<typename OutputIterator >

void CGAL::Point_set_with_structure< Kernel >::adjacency	(	std::size_t	i,
		OutputIterator	output
	)		const

Returns all Plane_shape objects that are adjacent to the point with index i.

Note

Points not adjacent to any plane are free-form points, points adjacent to 1 plane are planar points, points adjacent to 2 planes are edge points and points adjacent to 3 or more planes are vertices.