plasma.py

#!/usr/bin/env python
# awesome information here:
# http://lodev.org/cgtutor/plasma.html

import time
import math
import random


def get_color(w, h, s=8):
    return (128.0 + (128.0 * math.sin(x / s))
            + 128.0 + (128.0 * math.sin(y / s))
            + 128.0 + (128.0 * math.sin((x*x + y*y) / s))
            + 128.0 + (128.0 * math.sin(math.sqrt(x * x + y * y + time.clock()*(float(s)/10.0)) / s))
    ) / s*1.5


def put_char(colors=(0,0,0), x=0, y=0):
    colors = map(lambda c: 255 if c <=0 or c >= 255 else c, map(int, colors))
    color = "\033[48;2;{r};{g};{b}m".format(r=colors[0], g=colors[1], b=colors[2])
    text = "\033[{y};{x}f{chr}".format(x=x, y=y, chr=" ")
    print(color+text)


def clear():
    print("\033[2J")


w = 80
h = 25
s = 4
f = 1

clear()
while 1:
    for x in range(w):
        for y in range(h):
            colors = [get_color(w, h, s) for c in range(3)]
            put_char(colors, x, y)
    if f:
        s+=0.1
    else:
        s-=0.1

    if s >= 16:
        f = 0
    elif s <= 4:
        f = 1
    time.sleep(1.0/12)