random_plot.lua
local colors = require("ansicolors")
local assertions = require("luatypechecks.assertions")
local Plot = require("luaplot.plot")
local function print_plot(plot, vertical_step)
assertions.is_instance(plot, Plot)
assertions.is_number(vertical_step)
local text = ""
for height = 1, 0, -vertical_step do
for _, point in ipairs(plot) do
local delta = math.abs(point - height)
local symbol = delta < vertical_step / 2
and colors("%{cyan}*%{reset}")
or "."
text = text .. symbol
end
text = text .. "\n"
end
print(text)
end
local function sleep(seconds)
assertions.is_number(seconds)
local start = os.clock()
while os.clock() - start < seconds do end
end
local SPEED = 0.25
local WIDTH = 40
local HEIGHT = 10
local VERTICAL_STEP = 1 / HEIGHT
local PRINT_DELAY = 1 / (SPEED * WIDTH)
local FACTOR = 1.5 * PRINT_DELAY
math.randomseed(os.time())
local plot = Plot:new(WIDTH, 0.5)
while true do
plot:shift()
plot:push_with_random_factor(FACTOR)
print_plot(plot, VERTICAL_STEP)
sleep(PRINT_DELAY)
end