NAME

Math::PlanePath::Rows -- points in fixed-width rows

SYNOPSIS

 use Math::PlanePath::Rows;
 my $path = Math::PlanePath::Rows->new (width => 20);
 my ($x, $y) = $path->n_to_xy (123);

DESCRIPTION

This path is rows of a given fixed width. For example width 7 is

                                  width=7
                                    ^
    ...                             |
      3  |  22 ...
      2  |  15  16  17  18  19  20  21
      1  |   8   9  10  11  12  13  14
    y=0  |   1   2   3   4   5   6   7
          -------------------------------
           x=0   1   2   3   4   5   6

FUNCTIONS

$path = Math::PlanePath::Rows->new (width => $w)

Create and return a new path object. A width parameter must be supplied.

($x,$y) = $path->n_to_xy ($n)

Return the x,y coordinates of point number $n in the path.

$n = $path->xy_to_n ($x,$y)

Return the point number for coordinates $x,$y.

$x and $y are rounded to the nearest integers, which has the effect of treating each point in the path as a square of side 1, so a column -0.5 <= x < width+0.5 and y>=-0.5 is covered.

SEE ALSO

Math::PlanePath, Math::PlanePath::Columns

HOME PAGE

http://user42.tuxfamily.org/math-planepath/index.html

LICENSE

Math-PlanePath is Copyright 2010 Kevin Ryde

Math-PlanePath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

Math-PlanePath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Math-PlanePath. If not, see <http://www.gnu.org/licenses/>.