CGAL 6.1 - Classification

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CGAL::Classification::Cluster< ItemRange, ItemMap > Class Template Reference
Reference Manual » Cluster Classification

`#include <CGAL/Classification/Cluster.h>`

## Definition

template<typename ItemRange, typename ItemMap>
class CGAL::Classification::Cluster< ItemRange, ItemMap >

Class that represent a cluster of items to be classified as a single atomic object.

A cluster is a set of indices of items inside an input range with random access.

Template Parameters

  ItemRange | model of `ConstRange`. Its iterator type is `RandomAccessIterator`. Its value type depends on the data that is classified (for example, `CGAL::Point_3` or `CGAL::Triangle_3`).
  ItemMap | model of `ReadablePropertyMap` whose key type is the value type of the iterator of `ItemRange` and value type is the type of item to classify (for example, `CGAL::Point_3`).

## Public Types
using | Item = typename boost::property_traits< ItemMap >::value_type

## Constructor
| Cluster (const ItemRange &range, ItemMap item_map)
| Constructs an empty cluster of items.

## Modifications
void | clear ()
| Clears the cluster.
void | insert (std::size_t idx)
| inserts element of index `idx` in the cluster.

## Access
std::size_t | size () const
| returns the number of items in the cluster.
std::size_t | index (std::size_t i) const
| returns the index (in the input range) of the i^{th} element of the cluster.
const Item & | operator[] (std::size_t i) const
| returns the i^{th} item of the cluster.
const CGAL::Bbox_3 & | bbox () const
| returns the bounding box of the cluster.

## Classification
int | training () const
| returns the input classification value used for training.
int & | training ()
| returns a reference to the input classification value used for training.
int | label () const
| returns the output classification value.
int & | label ()
| returns a reference to the output classification value.

## Constructor & Destructor Documentation

## ◆ Cluster()

template<typename ItemRange , typename ItemMap >

CGAL::Classification::Cluster< ItemRange, ItemMap >::Cluster | ( | const ItemRange & | range,
|  | ItemMap | item_map
| ) |  |

Constructs an empty cluster of items.

Items in the clusters will be subsets of `range`.

Parameters

  range | input range.
  item_map | property map to access the input items.