Math::PlanePath::Base::Generic -- various path helpers
use Math::PlanePath::Base::Generic 'round_nearest'; $x = round_nearest($x);
This is a few generic helper functions for the PlanePath code. They're designed to work on plain Perl integers and floats and in some cases there's some special support for Math::BigInt
.
Nothing is exported by default but each function below can be as in the usual Exporter style,
use Math::PlanePath::Base::Generic 'round_nearest';
(But not parameter_info_nstart0()
and parameter_info_nstart1()
, for the reason described below.)
$x = round_nearest ($x)
Return $x
rounded to the nearest integer. If $x
is half way, such as 2.5 then it's round upwards to 3.
$x = round_nearest($x);
$href = Math::PlanePath::Base::Generic::parameter_info_nstart0()
$href = Math::PlanePath::Base::Generic::parameter_info_nstart1()
Return an n_start
parameter hashref suitable for use in a parameter_info_array()
, with default either 0 or 1. For example,
# alone package Math::PlanePath::MySubclass; use constant parameter_info_array => [ Math::PlanePath::Base::Generic::parameter_info_nstart1() ]; # or with other parameters too package Math::PlanePath::MySubclass; use constant parameter_info_array => [ { name => 'something', type => 'integer', default => '123', }, Math::PlanePath::Base::Generic::parameter_info_nstart1(), ];
This function is not exportable since it's meant for a one-off call in an initializer and so no need to import it for repeated use.
Math::PlanePath, Math::PlanePath::Base::Digits, Math::PlanePath::Base::NSEW
http://user42.tuxfamily.org/math-planepath/index.html
Copyright 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Kevin Ryde
This file is part of Math-PlanePath.
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/>.