Math::PlanePath::Base::Generic(3) various path helpers

SYNOPSIS


use Math::PlanePath::Base::Generic 'round_nearest';
$x = round_nearest($x);

DESCRIPTION

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".

EXPORTS

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.)

FUNCTIONS

Generic

"$x = round_nearest ($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.

HOME PAGE

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

LICENSE

Copyright 2010, 2011, 2012, 2013, 2014, 2015, 2016 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/>.

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