# Tk_blobs.py

# Tk_blob.py

from tkinter import *
import math
from random import shuffle, randint as rnd

root = Tk()

ww = 520
hh = 520
r = (min(ww,hh)-5)/2

canvas = Canvas(root,width=ww,height=hh)
canvas.pack()

rainbow = []
def rgb():
    rainbow.append('#{:02x}{:02x}{:02x}'.format(r,g,b))

def wave(z,amp):
    return abs(amp-math.cos(math.radians(z))*amp)/2

def wave_animate(amplitude):
    waves = {}
    for amp in range(3,amplitude+1):
        waves[amp] = []
        for z in range(0,3600,int(3600/(amp+30))):
            z *= 0.1
            zzz = int(wave(z,amp+1))
            if zzz == amp:
                waves[amp] += waves[amp][::-1][1:]
                break
            else:
                waves[amp] += [zzz+1]
    return waves

WAVES = wave_animate(100)

r, g, b = 255, 0, 0
for g in range(256):
    rgb()
for r in range(255, -1, -1):
    rgb()
for b in range(256):
    rgb()
for g in range(255, -1, -1):
    rgb()
for r in range(256):
    rgb()
for b in range(255, -1, -1):
    rgb()

p = len(rainbow)/360.0
r360 = [rainbow[int(z*p)] for z in range(360)]

points = []
circ = int((math.pi * r**2) / 500)
p = 360.0/circ

for z in range(0,ww,2):
    canvas.create_line((0,z,z+ww,z),fill='black')
    canvas.create_line((z,0,z,z+hh),fill='black')

ANGLES = list(range(0,circ,3))

def find_xy(t):
    t *= p
    wave = of_waves[int(t)]
    x = math.sin(math.radians(t))
    y = math.cos(math.radians(t))
    x,y = [z*(150+wave)+r-5 for z in (x,y)]
    return x,y

while 1:
    of_circ = []
    of_waves = dict((z,[]) for z in range(circ+1))
    L = rnd(9,30)
    of_angles = ANGLES[:]
    shuffle(of_angles)
    while len(of_circ) < L+1:
        period = of_angles.pop()
        amp = rnd(10,30)
        of_circ.append((period,amp))
    for i in range(L):
        period,amp = of_circ[i]
        for j in WAVES[amp]:
            of_waves[period%(360+1)].append(j)
            period += 1

    of_waves = [sum(of_waves[z]) for z in range(circ)]
    canvas.delete('blob')
    px,py = find_xy(0)
    x0,y0 = px,py
    for t in range(1,circ):
        x,y = find_xy(t)
        # angle = math.degrees(math.atan2(x,y))
        color = r360[int(t*p)]
        canvas.create_line((px,py,x,y),fill=color,width=5,tag='blob')
        px,py = x,y
    color = r360[int(t*p)]
    canvas.create_line((x,y,x0,y0),fill=color,width=5,tag='blob')
    canvas.update()