# NAME

Math::PlanePath::Base::NSEW -- multi-inheritance mixin for North, South, East, West unit steps

# SYNOPSIS

```
package Math::PlanePath::Foo;
use Math::PlanePath;
use Math::PlanePath::Base::NSEW;
@ISA = ('Math::PlanePath::Base::NSEW', 'Math::PlanePath');
```

# DESCRIPTION

This is a multi-inheritance mixin for paths which take only steps North, South, East and West by distance 1 each time. This includes for example the `SquareSpiral`

and also things like the `DragonCurve`

or `CCurve`

.

The following path descriptive methods are provided

```
value
dx_minimum() -1
dx_maximum() 1
dy_minimum() -1
dy_maximum() 1
dsumxy_minimum() -1
dsumxy_maximum() 1
ddiffxy_minimum() -1
ddiffxy_maximum() 1
dir_maximum_dxdy() 0,-1 # maximum South
```

# SEE ALSO

Math::PlanePath, Math::PlanePath::Base::Generic

# HOME PAGE

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

# LICENSE

Copyright 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/>.