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Kaleidoscope/README.md

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# Kaleidoscope-LED-Stalker
![status][st:experimental] [![Build Status][travis:image]][travis:status]
[travis:image]: https://travis-ci.org/keyboardio/Kaleidoscope-LED-Stalker.svg?branch=master
[travis:status]: https://travis-ci.org/keyboardio/Kaleidoscope-LED-Stalker
[st:stable]: https://img.shields.io/badge/stable-✔-black.png?style=flat&colorA=44cc11&colorB=494e52
[st:broken]: https://img.shields.io/badge/broken-X-black.png?style=flat&colorA=e05d44&colorB=494e52
[st:experimental]: https://img.shields.io/badge/experimental----black.png?style=flat&colorA=dfb317&colorB=494e52
The `StalkerEffect` plugin provides an interesting new typing experience: the
LEDs light up as you tap keys, and play one of the selected effects: a haunting
trail of ghostly white lights, or a blazing trail of fire.
## Using the plugin
To use the plugin, one needs to include the header, and select the effect.
```c++
#include <Kaleidoscope.h>
#include <Kaleidoscope-LED-Stalker.h>
void setup () {
Kaleidoscope.setup ();
StalkerEffect.configure (STALKER (Haunt, {0xff, 0, 0}));
USE_PLUGINS (&StalkerEffect);
StalkerEffect.activate ();
}
```
It is recommended to place the activation of the plugin (the `USE_PLUGINS` call)
as early as possible, so the plugin can catch all relevant key presses. The
configuration can happen at any time, but using the `STALKER` macro is highly
recommended.
## Plugin methods
The plugin provides the `StalkerEffect` object, which has the following
method:
### `.configure(effect)`
> Set the effect to use with the plugin. See below for a list.
>
> It is recommended to use the `STALKER` macro to declare the effect itself.
### `.stepLength`
> The length - in milliseconds - of each step of the animation. An animation
> lasts 256 steps.
>
> Not a method itself, but a changeable value.
>
> Defaults to 50.
## Plugin helpers
### `STALKER(effect, params...)`
> Returns an effect, to be used by the `.configure` method of the
> `StalkerEffect` object. Any arguments given to the macro, are also passed on
> to the effect. If the effect takes no arguments, use `NULL`.
## Plugin effects
The plugin provides the following effects:
### `Haunt([color])`
> A ghostly haunt effect, that trails the key taps with a ghostly white color
> (or any other color, if specified).
### `BlazingTrail()`
> A blazing trail of fire will follow our fingers!
## Further reading
Starting from the [example][plugin:example] is the recommended way of getting
started with the plugin.
[plugin:example]: https://github.com/keyboardio/Kaleidoscope-LED-Stalker/blob/master/examples/LED-Stalker/LED-Stalker.ino