#!/usr/bin/env python2

from math import *
import os
import time


### Classy plasma ############################################

class Plasma:

  width, height = 60, 40
  i = 1

  def dim(_, val):
    greyscale = "@MBHENR#KWXDFPQASUZbdehx*8Gm&04LOVYkpq5Tagns69owz$CIu23Jcfry%1v7l+it[]{}?j|()=~!-/<>\\\"^_';,:`. "
    return greyscale[int(min(1.0,max(0.0,val))*(len(greyscale)-1))]

  def update(_):
    _.i += 1

  def render(_):
    i = _.i

    i = i/1000.0

    for y in range(0, _.height):
      line = ""
      for x in range(0, _.width):
        #line += _.dim((sin(x*(i/(cos(y))))*tan(y*i))*(i/(x+1)))
        #line += _.dim(((sin(y*(i/(cos(x))))*tan(x*i))*(i/(x+1)))*(i*(y+1)))
        #line += _.dim(i/((x*y/20)+1))
        #line += _.dim(sin((i/2)/((sin(x*i)*cos(y*i)/200)+1)))
        #line += _.dim(sin((i/2)/((sin(x*i)*(y*i)/200)+1)))
        line += _.dim(sin(tan(cos(x*y*(i/4)))))
      print(line)


  def run(_):
    clear()
    while True:
      home()

      _.render()
      _.update()

      time.sleep(0.01)


### Utilities ###############################################

def clear():
  print('\x1b[2J')

def home():
  print('\x1b[H')

def main():
  return '__main__' == __name__


### Main ####################################################

if main():
  Plasma().run()