Caleidenticon

Caleidenticon creates caleidoscope-like identicons.

It is based on RubyIdenticon by Chris Branson which in turn was based on go-identicon by Damian Gryski.

Usage

require 'caleidenticon'

Create an identicon png and save it to a path:

Caleidenticon.create_and_save(user.email, user.identicon_path, {salt: my_salt})

create_and_save takes 3 parameters:

input     # a string on which to base the identicon (usually an email or username)
save_path # the storage path for the resulting identicon png file
options   # a Hash (not required)

Options

complexity:      # Integer (2..n)  number of elements per image. affects image size.
scale:           # Integer (1..n)  resolution of each element. affects image size.
density:         # Integer (2..10) how densely the image is covered with elements
spikiness:       # Integer (1..n)  higher values produce a more pointy overall shape
corner_sprinkle: # Integer (0..n)  decorates bare corners if spikiness is > 0 
colors:          # Array of 4 arrays with 3 Integers (0..255) each.
salt:            # String of 21 alphanumeric chars, used for hashing the input.
debug:           # Bool - if true, the gem will print a lot of debug information.

Using your own salt is optional, but it is recommended, as it ensures that the mapping from input to identicon will be unique to your application.

With the colors: option you can make the identicons fit in more closely with the color scheme of your app. E.g. if your app has bright green and blue colors you could do something like:

options = {salt: my_salt, colors: [[80,255,100], [80,100,255], [0,200,255], [0,255,200]]}
Caleidenticon.create_and_save(user.email, user.identicon_path, options)

Which will produce Identicons like these:

Higher values for complexity, density and scale make the generation more expensive, but the results look better at a large scale:

More complex and dense →

To test your settings, create a large number of identicons by running:

Caleidenticon.run_test(my_output_dir, number_of_identicons, my_options)