Boost::Geometry::Utils - Bindings for the Boost Geometry library

version 0.07

use Boost::Geometry::Utils qw(polygon linestring polygon_linestring_intersection);
my $square = [ # ccw
[10, 10],
[20, 10],
[20, 20],
[10, 20],
];
my $hole_in_square = [ # cw
[14, 14],
[14, 16],
[16, 16],
[16, 14],
];
my $polygon = polygon($square, $hole_in_square);
my $linestring = linestring([ [5, 15], [30, 15] ]);
my $intersection = polygon_linestring_intersection($polygon, $linestring);
# $intersection is:
# [
# [ [10, 15], [14, 15] ],
# [ [16, 15], [20, 15] ],
# ]

This module provides bindings to perform some geometric operations using the
Boost Geometry library. It does not aim at providing full bindings for such
library, and that's why I left the

*Boost::Geometry* namespace free. I'm
unsure about the optimal architectural for providing full bindings, but I'm
interested in such a project -- so, if you have ideas please get in touch with
me.

**Warning:** the API could change in the future.

Performs an intersection between the supplied polygon and linestring, and
returns an arrayref of linestrings (represented as arrayrefs of points). Note
that such an intersection is also called

*clipping*.

Same as

*polygon_linestring_intersection* but it accepts a multilinestring
object to perform multiple clippings in a single batch.

Same as

*polygon_multi_linestring_intersection* but it accepts a
multipolygon object to perform multiple clippings in a single batch.

Performs a difference between the supplied multilinestring and the supplied
multipolygon. It returns a multilinestring object.

Converts one or more arrayref(s) of points to a WKT representation of a polygon
(with holes).

Converts an arrayref of points to a WKT representation of a multilinestring.

Parses a MULTILINESTRING back to a Perl data structure.

Accepts an arrayref of points representing a linestring and a numeric tolerance
and returns an arrayref of points representing the simplified linestring.

Accepts an arrayref of arrayrefs of points representing a multilinestring and a
numeric tolerance and returns an arrayref of arrayrefs of points representing
the simplified linestrings.

Accepts a point and an arrayref of points representing a polygon and returns
true or false according to the 'cover_by' strategy.

Same as above but accepts a multipolygon arrayref.

Accepts a point and an arrayref of points representing a polygon and returns
true or false according to the 'within' strategy.

Same as above but accepts a multipolygon arrayref.

Returns length of a linestring.

Returns the centroid point of a given polygon.

Returns the centroid point of a given linestring.

Returns the centroid point of a given multi_linestring.

Corrects the orientation(s) of the given polygon.

Corrects the orientation(s) of the given multi_polygon.

Returns the area of the given polygon.

Thanks to mauke and mst (Matt S. Trout (cpan:MSTROUT)
<mst@shadowcat.co.uk>) for their valuable help in getting this to
compile under Windows (MinGW) too. Thanks to Mark Hindness for his work on
data types conversion.

Alessandro Ranellucci <aar@cpan.org>

This software is copyright (c) 2013 by Alessandro Ranellucci.

This is free software; you can redistribute it and/or modify it under the same
terms as the Perl 5 programming language system itself.