CGAL 4.7 - 2D Placement of Streamlines: CGAL::Regular_grid_2< StreamLinesTraits_2 > Class Template Reference

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CGAL 4.7 - 2D Placement of Streamlines

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CGAL::Regular_grid_2< StreamLinesTraits_2 > Class Template Reference
2D Placement of Streamlines 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.