NAME

Image::GeoTIFF::Tiled::ShapePart

DESCRIPTION

This class is used by Image::GeoTIFF::Tiled::Shape to represent a single "part" of a shape (a line between two points), shapes being made up of multiple parts.

Whenever the start or end points are set, the linear interpolation along integer y-values are calculated and stored. Interpolation is done at the middle of the pixel latitude.

METHODS

CONSTRUCTOR

new($start,$end)

Starting and ending points are required during construction. Points are 2D array references [ $x, $y ].

ACCESSORS

start

Returns, optionally sets, the starting point. Setting causes the intermediate points between the ending point to be re-interpolated and therefore shouldn't be done.

end

Returns, optionally sets, the ending point. Setting causes the intermediate points between the starting point to be re-interpolated and therefore shouldn't be done.

upper

Returns the start or end point, whichever has the smaller latitude.

lower

Returns the start or end point, whichever has the larger latitude.

str

Returns a string representation of the object (debugging only).

GET POINTS

get_point($y)

Returns the [ $x, $y ] interpolated point located at (integer) pixel latitude $y, or undef if there's no point along the given $y.

get_x($y)

Returns just the $x value of get_point, or undef if there's no point along the given $y.

COPYRIGHT & LICENSE

Copyright 2010 Blake Willmarth.

This program is free software; you can redistribute it and/or modify it under the terms of either:

• the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version, or

• the Artistic License version 2.0.