CGAL::Regular_grid_2< StreamLinesTraits_2 > Class Template Reference

#include <CGAL/Regular_grid_2.h>

Definition

This class provides a 2D vector field specified by a set of sample points defined on a regular grid, with a bilinear interpolation scheme over its cells (i.e. for each point p in a cell c, the vector value is interpolated from the vertices of c).

Template Parameters

StreamLinesTraits_2

has to instantiated by a model of the concept StreamLinesTraits_2.

Is Model Of:

VectorField_2

See also

Triangular_field_2<StreamLinesTraits_2>

Examples:

Stream_lines_2/stl_regular_field.cpp.

Types
typedef StreamLinesTraits_2::FT	FT
	the scalar type.
typedef StreamLinesTraits_2::Point_2	Point_2
	the point type.
typedef StreamLinesTraits_2::Vector_2	Vector_2
	the vector type.

Creation
	Regular_grid_2 (int x_samples, int y_samples, FT x_size, FT y_size)
	Generate a regular grid whose size is x_size by y_size, while x_samples and y_samples specify the number of samples on x and y.

Modifiers
In addition to the minimum interface required by the concept definition, the class Regular_grid_2 provides the following function to fill the vector field with the user data.
void	set_xy (int i, int j, Vector_2 v)
	Attribute the vector v to the position (i,j) on the regular grid.

Access Functions
std::pair< int, int >	get_dimension ()
	returns the dimension of the grid.
std::pair< FT, FT >	get_size ()
	returns the size of the grid.