Eigen::BlockIndex Struct Reference

List of integer intervals. More...

#include <hpp/constraints/matrix-view.hh>

Public Types
typedef hpp::constraints::size_type	size_type
	Index of vector or matrix. More...
typedef std::pair< size_type, size_type >	segment_t
	Interval of indices [first, first + second - 1]. More...
typedef std::vector< segment_t >	segments_t
	vector of segments More...

Static Public Member Functions
static size_type	cardinal (const segments_t &a)
	Return the number of indices in the vector of segments. More...
template<typename Derived >
static segments_t	fromLogicalExpression (const Eigen::ArrayBase< Derived > &array)
	Build a vector of segments from an array of Boolean. More...
static void	sort (segments_t &a)
	Sort segments in increasing order. More...
static void	shrink (segments_t &a)
	Build a sequence of non overlapping segments. More...
static bool	overlap (const segment_t &a, const segment_t &b)
	Whether two segments overlap. More...
static segments_t	sum (const segment_t &a, const segment_t &b)
	Compute the union of tws segments. More...
static void	add (segments_t &a, const segment_t &b)
	In place addition of a segment_t to segments_t. More...
static void	add (segments_t &a, const segments_t &b)
	In place addition of segments_t to segments_t. More...
static segments_t	difference (const segment_t &a, const segment_t &b)
	Compute the set difference between two segments. More...
static segments_t	difference (const segments_t &a, const segment_t &b)
	Compute the set difference between a vector of segments and a segment. More...
static segments_t	difference (const segment_t &a, const segments_t &b)
	Compute the set difference between a segment and a vector of segments. More...
static segments_t	difference (const segments_t &a, const segments_t &b)
	Compute the set difference between two vectors of segments. More...
static segments_t	split (segments_t &segments, const size_type &cardinal)
	Split a set of segment into two sets of segments. More...
static segments_t	extract (const segments_t &segments, size_type start, size_type cardinal)
	Extract a subset of a set of segments. More...

Detailed Description

List of integer intervals.

Used to select blocks in a vector or in a matrix.

Member Typedef Documentation

segment_t

typedef std::pair<size_type, size_type> Eigen::BlockIndex::segment_t

Interval of indices [first, first + second - 1].

segments_t

typedef std::vector<segment_t> Eigen::BlockIndex::segments_t

vector of segments

size_type

typedef hpp::constraints::size_type Eigen::BlockIndex::size_type

Index of vector or matrix.

Member Function Documentation

add() [1/2]

static void Eigen::BlockIndex::add ( segments_t &  a, const segment_t &  b  )

static

In place addition of a segment_t to segments_t.

add() [2/2]

static void Eigen::BlockIndex::add ( segments_t &  a, const segments_t &  b  )

static

In place addition of segments_t to segments_t.

cardinal()

static size_type Eigen::BlockIndex::cardinal ( const segments_t &  a )

static

Return the number of indices in the vector of segments.

Parameters

a	vector of segments

difference() [1/4]

static segments_t Eigen::BlockIndex::difference ( const segment_t &  a, const segment_t &  b  )

static

Compute the set difference between two segments.

difference() [2/4]

static segments_t Eigen::BlockIndex::difference ( const segments_t &  a, const segment_t &  b  )

static

Compute the set difference between a vector of segments and a segment.

Note

assumes a is sorted

difference() [3/4]

static segments_t Eigen::BlockIndex::difference ( const segment_t &  a, const segments_t &  b  )

static

Compute the set difference between a segment and a vector of segments.

Note

assume b is sorted

difference() [4/4]

static segments_t Eigen::BlockIndex::difference ( const segments_t &  a, const segments_t &  b  )

static

Compute the set difference between two vectors of segments.

Note

assume a and b are sorted

extract()

static segments_t Eigen::BlockIndex::extract ( const segments_t &  segments, size_type  start, size_type  cardinal  )

static

Extract a subset of a set of segments.

Parameters

segments	input set of segments
start	beginning of extracted set of segments (cardinal of subset left behind in input set of segments)
cardinal	cardinal of extracted set of segments,

Returns

subset of segments.

Referenced by Eigen::MatrixBlocksBase< MatrixBlocks< _allRows, _allCols > >::block(), Eigen::MatrixBlocksBase< MatrixBlocks< _allRows, _allCols > >::middleCols(), and Eigen::MatrixBlocksBase< MatrixBlocks< _allRows, _allCols > >::middleRows().

fromLogicalExpression()

template<typename Derived >

BlockIndex::segments_t Eigen::BlockIndex::fromLogicalExpression ( const Eigen::ArrayBase< Derived > &  array )

static

Build a vector of segments from an array of Boolean.

Parameters

array

array of Boolean values

Returns

the vector of segments corresponding to true values in the input.

overlap()

static bool Eigen::BlockIndex::overlap ( const segment_t &  a, const segment_t &  b  )

static

Whether two segments overlap.

shrink()

static void Eigen::BlockIndex::shrink ( segments_t &  a )

static

Build a sequence of non overlapping segments.

Parameters

a	a vector of segments

Note

assumes a is sorted

sort()

static void Eigen::BlockIndex::sort ( segments_t &  a )

static

Sort segments in increasing order.

Compare lower bounds of intervals and lengths if lower bounds are equal.

Referenced by Eigen::MatrixBlocks< false, false >::MatrixBlocks().

split()

static segments_t Eigen::BlockIndex::split ( segments_t &  segments, const size_type &  cardinal  )

static

Split a set of segment into two sets of segments.

Parameters

segments	input set of segments,
cardinal	cardinal of the first set of segments,

Returns

the first set of segments.

The second set is stored in the input set of segments.

sum()

static segments_t Eigen::BlockIndex::sum ( const segment_t &  a, const segment_t &  b  )

static

Compute the union of tws segments.