# Tk_tri_wave.py

# Tk_tri_wave.py

from itertools import permutations

L = range(0,255,10)
L[-1] = 255
combos = [z for z in permutations(L, 4)]

from PIL import Image, ImageTk, ImageDraw
from Tkinter import *
import PIL
import math

ww = 120
hh = 120
waves = {}
ppp = list('abc')
for i in (69,123,299):
    incr = (360.0/i)
    xy = {}
    p = ppp.pop()
    waves[p] = []
    z = 0
    while z < 360:
        s = math.cos(math.radians(z))*(hh/2-20)+(hh/2)
        xy[len(xy)] = min(600,int(s))
        z += incr
    t = [xy[z] for z in range(len(xy))]
    waves[p].extend(t)
0
a,b,c = waves
a2 = len(waves[a])
b2 = len(waves[b])
c2 = len(waves[c])

zzz = 0
root=Tk()
canvas = Canvas(root,width=ww,height=hh,bg='black')
canvas.grid(row=0,column=0,sticky=N+S+E+W)

def high():
    aa = waves[a][zzz%a2]
    bb = waves[b][zzz%b2]
    cc = waves[c][zzz%c2]
    return (aa+bb+cc)/3
0

wide = []
while zzz != ww+2:
    wide.append(high())
    zzz += 1

def plot():
    color = oRGB(rgb)
    x = xx+2
    canvas.create_line((x, 0, x, yy), fill=color)
0
def oRGB(rgb):
    r,g,b = rgb
    return "#%02x%02x%02x" % (r,g,b)
0
while 1:
    canvas.delete('all')
    for xx in range(0,ww):
        yy = wide[xx]
        rgb = 255,255,0
        plot()
    canvas.update()
    wide.append(high())
    wide.pop(0)
    zzz += 1