## Maurer-Rosen
## mit Zufallsfarben

########################################
## Größe des Fensters mit r0 = setzen ##
########################################

import random
from Tkinter import *
import math

r0 = 350.0
mx = r0+25
my = r0+25
w0 = 2*int(r0)+30
h0 = 2*int(r0)+30

def die(event=0): sys.exit(0)

def color():
    col="#"
    for i in range(3):
        c = random.randrange(200)
        if random.random()<0.5: c /= 2
        col=col+"%02x"%(c)
    return col

        
def calc(phi,n):
    p1 = phi%360
    p2 = (n*phi)%360
    w = math.pi*p1/180.0
    r = r0*math.sin(math.pi*p2/180.0)
    return (int(r*math.cos(w)+0.5),int(r*math.sin(w)+0.5))
    

def rose():
    global root,lines
    
    n = random.randrange(1,360)
    d = random.randrange(1,360)
    values=cv.create_text(62,22,
                   text="n="+str(n)+" d="+str(d),font=("Arial",10),
                   fill="#000000", justify=LEFT)
    farbe = color()
    t = 0
    c = 0
    while c<=360:
        theta=t
        oldx,oldy = calc(theta,n)
        while 1:
            theta = (theta+d)%360
            newx,newy = calc(theta,n)
            cv.itemconfigure(lines[c],fill=farbe)
            cv.coords(lines[c],mx+oldx,my+oldy,mx+newx,my+newy)
            # cv.update()
            c = c+1
            if c>=360: break 
            if theta==t: break
            oldx,oldy=newx,newy
        cv.update()
        t=t+1
    cv.delete(values)
            
def start():
    global root,cv,lines
    root = Tk()
    root.title("Maurer-Rosen")
    cv = Canvas(root,width=w0,height=h0,borderwidth=10,background="#b0b0b0")
    root.bind("<Escape>",die)
    cv.pack(expand=1,fill=NONE)
    cv.create_rectangle(10,10,2*mx+10,2*my+10,fill="#e8e8e8", outline="")
    root.update()
    lines = 361*[0]
    for l in range(361): lines[l]=cv.create_line(0,0,0,0)
    while 1:
        rose()
        cv.after(2000)
        root.update()

    root.update()
    root.after(1000)    
    root.update()
    root.destroy()
 
start()