Base class for all cluster tree constructors based on geometry data.

#include <TBSPCTBuilder.hh>

Inheritance diagram for TGeomCTBuilder:

Classes
struct	data_t
	Datatype for internal argument transfer. More...

class	TOptClusterSize
	Controls optimal cluster size per tree level. More...

Public Member Functions
	TGeomCTBuilder (const uint n_min=CFG::Cluster::nmin, const uint min_leaf_lvl=0)
	construct cluster tree builder

virtual std::unique_ptr< TClusterTree >	build (const TCoordinate *coord, const idx_t idx_ofs=0) const

virtual std::unique_ptr< TGeomCluster >	divide (const TNodeSet &dofs, const uint lvl, const TBBox &bbox, const TOptClusterSize &csize, const idx_t index_ofs, data_t &data) const =0
	recursively build cluster tree for indices in dofs

void	adjust_bb (const bool b)
	set flag for adjusting bounding box

void	sort_wrt_size (const bool b)
	set flag for sorting son cluster wrt. size

Protected Member Functions
virtual std::unique_ptr< TGeomCluster >	build_leaf (const TNodeSet &dofs, const uint lvl, const idx_t index_ofs, const TBBox &bbox, data_t &data) const
	create a leaf in a clustertree containing indices in dofs

virtual TBBox	compute_bb (const TNodeSet &dofs, const data_t &data) const
	compute bounding box of index set defined by dofs

virtual void	update_bb (const TNodeSet &dofs, TBBox &bbox, const data_t &data) const
	update bounding box of index set defined by dofs

virtual void	check_bb (TBBox &bbox, const data_t &data) const
	check and update bbox in case of degenerate axis, e.g. very small length

Protected Attributes
uint	_n_min
	minimal size of a cluster, i.e. not smaller than this

uint	_min_leaf_lvl
	minimal level on which leaves may occur

bool	_adjust_bb
	flag for adjusting bounding boxes of nodes

bool	_sort_wrt_size
	flag for sorting sub clusters w.r.t. size

Member Function Documentation

◆ build()

virtual std::unique_ptr< TClusterTree > build	(	const TCoordinate *	coord,
		const idx_t	idx_ofs = `0`
	)		const

virtual

build cluster tree out of given coordinate set

Parameters

coord	: geometry information for each index
idx_ofs	: start renumbering indices from idx_ofs