CGAL::Stream_lines_2< VectorField_2, Integrator_2 > Class Template Reference

#include <CGAL/Stream_lines_2.h>

Definition

The class Stream_lines_2 generates a placement of streamlines in a 2D domain according to a bidimensional vector field.

The class places streamlines according to a specified density and gives access to the generated streamlines via two iterators over a container of iterators that provide access to the streamline points.

Template Parameters

VectorField_2	must be a model of the concept VectorField_2.
Integrator_2	is a function object and must be a model of the concept Integrator_2.

Examples:

Stream_lines_2/stl_regular_field.cpp, and Stream_lines_2/stl_triangular_field.cpp.

Public Member Functions
	Stream_lines_2 (VectorField_2 vector_field_2, Integrator_2 integrator_2, FT separating_distance, FT saturation_ratio)
	Constructor which generates a streamline placement.

Types
typedef VectorField_2::Geom_traits	Geom_traits
	the traits class.
typedef VectorField_2::FT	FT
	the scalar type.
typedef VectorField_2::Point_2	Point_2
	the point type.
typedef VectorField_2::Vector_2	Vector_2
	the vector type.

Streamline Iterators
typedef unspecified_type	Point_iterator_2
	iterator of points with value type Point_2.
typedef unspecified_type	Stream_line_iterator_2
	an iterator to visit the streamlines with value type std::pair<Point_iterator_2, Point_iterator_2>.
Stream_line_iterator	begin () const
	Starts at the first streamline.
Stream_line_iterator	end () const
	Past-the-end iterator.

Modifiers
void	set_separating_distance (FT new_value)
	Modify the separating distance.
void	set_saturation_ratio (FT new_value)
	Modify the saturation ratio.
void	update ()
	Update the placement after changing the separating distance or the saturation ratio.

Access Functions
FT	get_separating_distance () const
	returns the separating distance.
FT	get_saturation_ratio () const
	returns the saturation ratio.
void	print_stream_lines (std::ofstream &fw)
	prints the streamlines to an ASCII file: line by line, and point by point.