use Boost::Geometry::Utils qw(polygon linestring polygon_linestring_intersection);
my $square = [ # ccw
my $hole_in_square = [ # cw
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] ],
ABSTRACTThis 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.
polygon_linestring_intersectionPerforms 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.
polygon_multi_linestring_intersectionSame as polygon_linestring_intersection but it accepts a multilinestring object to perform multiple clippings in a single batch.
multi_polygon_multi_linestring_intersectionSame as polygon_multi_linestring_intersection but it accepts a multipolygon object to perform multiple clippings in a single batch.
multi_linestring_multi_polygon_differencePerforms a difference between the supplied multilinestring and the supplied multipolygon. It returns a multilinestring object.
polygon_to_wktConverts one or more arrayref(s) of points to a WKT representation of a polygon (with holes).
linestring_to_wktConverts an arrayref of points to a WKT representation of a multilinestring.
wkt_to_multilinestringParses a MULTILINESTRING back to a Perl data structure.
linestring_simplifyAccepts an arrayref of points representing a linestring and a numeric tolerance and returns an arrayref of points representing the simplified linestring.
multi_linestring_simplifyAccepts 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.
point_covered_by_polygonAccepts a point and an arrayref of points representing a polygon and returns true or false according to the 'cover_by' strategy.
point_covered_by_multi_polygonSame as above but accepts a multipolygon arrayref.
point_within_polygonAccepts a point and an arrayref of points representing a polygon and returns true or false according to the 'within' strategy.
point_within_multi_polygonSame as above but accepts a multipolygon arrayref.
linestring_lengthReturns length of a linestring.
polygon_centroidReturns the centroid point of a given polygon.
linestring_centroidReturns the centroid point of a given linestring.
multi_linestring_centroidReturns the centroid point of a given multi_linestring.
correct_polygonCorrects the orientation(s) of the given polygon.
correct_multi_polygonCorrects the orientation(s) of the given multi_polygon.
polygon_areaReturns the area of the given polygon.
ACKNOWLEDGEMENTSThanks to mauke and mst (Matt S. Trout (cpan:MSTROUT) <[email protected]>) for their valuable help in getting this to compile under Windows (MinGW) too. Thanks to Mark Hindness for his work on data types conversion.
AUTHORAlessandro Ranellucci <[email protected]>
COPYRIGHT AND LICENSEThis 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.