# NAME

Algorithm::Easing - Calculate eased translations between two positive whole integer values over time

# SYNOPSIS

```
## with mediator
use Algorithm::Easing;
use Algorithm::Easing::Mediator;
use Algorithm::Easing::Bounce;
# this example produces traditional 'bounce' output;
my $translation_mediator = Algorithm::Easing::Mediator->new(Algorithm::Easing::Bounce->new);
# total time for eased translation as a real positive integer value
my $d = 2.5;
# begin
my $b = 0;
# change
my $c = 0;
# time passed in seconds as a real positive integer between each frame
my $frame_time = 0.0625;
my @p = [319,0];
for(my $t = 0; $t < 2.5; $t += 0.0625) {
$p[1] = $translation_mediator->ease_out($t,$b,$c,$d)
# plot
...
}
```

# INTRODUCTION

Commonly used in animation, Penner's easing functions are beautiful translations between two positive whole integer values.

The included easing functions in Algorithm::Easing are :

```
Exponential
Bounce
Linear
Cubic
Quadratic
Quartinion
Quintonion
Sinusoidal
Backdraft
Circular
```

For ease of use, there is an included Mediator class. The Mediator class permits the programmer to select from the spread of easing functions through a single class name.

# METHODS

## ease_none usage :

```
Parameters :
Let t be time,
Let b be begin,
Let c be change,
Let d be duration,
Results :
Let p be position,
my $p = $obj->ease_none($t,$b,$c,$d);
```

This method is used for a linear translation between two positive real whole integers using a positive real integer as the parameter for time.

## ease_in usage :

```
Parameters :
Let t be time,
Let b be begin,
Let c be change,
Let d be duration,
Results :
Let p be position,
my $p = $obj->ease_in($t,$b,$c,$d);
```

This method is used to ease in between two positive real whole integers using a positive real integer as the parameter for time in the specified fashion.

## ease_out usage :

```
Parameters :
Let t be time,
Let b be begin,
Let c be change,
Let d be duration,
Results :
Let p be position,
my $p = $obj->ease_out($t,$b,$c,$d);
```

This method is used to ease out between two positive real whole integers using a positive real integer as the parameter for time in the specified fashion.

## ease_both usage :

```
Parameters :
Let t be time,
Let b be begin,
Let c be change,
Let d be duration,
Results :
Let p be position,
my $p = $obj->ease_both($t,$b,$c,$d);
```

This method is used to ease both in then out between two positive real whole integers using a positive real integer as the parameter for time in the specified fashion.

# AUTHOR

Jason McVeigh, <jmcveigh@outlook.com>

# COPYRIGHT AND LICENSE

Copyright 2016 by Jason McVeigh

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.