CGAL::Dynamic_matrix< M > Class Template Reference

#include <CGAL/Dynamic_matrix.h>

Definition

template<typename M>
class CGAL::Dynamic_matrix< M >

The class Dynamic_matrix is an adaptor for an arbitrary matrix class M to provide the dynamic operations needed for monotone matrix search.

Template Parameters

M	is a model of BasicMatrix.

Is model of

MonotoneMatrixSearchTraits

BasicMatrix

See also

CGAL::monotone_matrix_search()

MonotoneMatrixSearchTraits

BasicMatrix

Implementation

All operations take constant time except for extract_all_even_rows() which needs time linear in the number of rows.

Creation
	Dynamic_matrix (const M &m)
	initializes the dynamic matrix to m.

Operations
int	number_of_columns () const
	returns the number of columns.
int	number_of_rows () const
	returns the number of rows.
Entry	operator() (int row, int column) const
	returns the entry at position (row, column).
void	replace_column (int old, int new)
	replace column old with column number new.
Matrix *	extract_all_even_rows () const
	returns a new matrix consisting of all rows of the dynamic matrix with even index, (i.e. first row is row \( 0\) of the dynamic matrix, second row is row \( 2\) of the dynamic matrix, etc.).
void	shrink_to_quadratic_size ()
	deletes the rightmost columns, such that the dynamic matrix becomes quadratic.

Constructor & Destructor Documentation

Dynamic_matrix()

template<typename M >

CGAL::Dynamic_matrix< M >::Dynamic_matrix

(

const M &

m

)

initializes the dynamic matrix to m.

m is not copied, we only store a reference.

Member Function Documentation

extract_all_even_rows()

template<typename M >

Matrix * CGAL::Dynamic_matrix< M >::extract_all_even_rows

(

)

const

returns a new matrix consisting of all rows of the dynamic matrix with even index, (i.e. first row is row \( 0\) of the dynamic matrix, second row is row \( 2\) of the dynamic matrix, etc.).

Precondition

number_of_rows() \( > 0\).

operator()()

template<typename M >

Entry CGAL::Dynamic_matrix< M >::operator()	(	int	row,
		int	column
	)		const

returns the entry at position (row, column).

Precondition

\( 0 \le\) row \( <\) number_of_rows(), and \( 0 \le\) column \( <\) number_of_columns().

replace_column()

template<typename M >

void CGAL::Dynamic_matrix< M >::replace_column	(	int	old,
		int	new
	)

replace column old with column number new.

Precondition

\( 0 \le\) old, new \( <\) number_of_columns().

shrink_to_quadratic_size()

template<typename M >

void CGAL::Dynamic_matrix< M >::shrink_to_quadratic_size

(

)

deletes the rightmost columns, such that the dynamic matrix becomes quadratic.

Precondition

number_of_columns() \( \ge\) number_of_rows().

Postcondition

number_of_rows() \( ==\) number_of_columns().