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#!/usr/bin/env ruby
require 'term/ansicolor'
require 'tins/go'
include Tins::GO
class SnowFlake
include Term::ANSIColor
extend Term::ANSIColor
def initialize(x, y, shape: %w[ ❄ ❅ ❆ • • · · . . ])
@x, @y, @shape = x, y, Array(shape).sample
@shape.size != 1 and raise ArgumentError, "#@shape needs to be a character"
end
attr_accessor :x
attr_accessor :y
attr_accessor :shape
def to_s
move_to(y, x) { white on_black @shape }
end
end
opts = go 'n:s:'
new_snowflakes = (opts[?n] || 3).to_i
sleep_duration = (opts[?s] || 0.2).to_f
flakes = []
cycles = 0
wind = 0.5
loop do
print SnowFlake.hide_cursor, SnowFlake.on_black, SnowFlake.clear_screen
at_exit do
print SnowFlake.reset, SnowFlake.clear_screen, SnowFlake.move_home, SnowFlake.show_cursor
end
if cycles % (SnowFlake.terminal_lines / 3) == 0
wind, cycles = rand, 0
end
cycles += 1
flakes.reject! do |sf|
if rand > wind
sf.x -= 1
if sf.x <= 0
sf.x = SnowFlake.terminal_columns
end
else
sf.x += 1
if sf.x > SnowFlake.terminal_columns
sf.x = 1
end
end
sf.y += 1
sf.y > SnowFlake.terminal_lines
end
new_snowflakes.times do
flakes << SnowFlake.new(rand(1..SnowFlake.terminal_columns), 1)
end
print(*flakes)
sleep sleep_duration
rescue Interrupt
exit
end
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