# Tk_basic_vectoring.py

# Tk_basic_vectoring.py

from Tkinter import *
import random
import math
import time

WW = 1200
HH = 680
root = Tk()
root.geometry(str(WW)+"x"+str(HH)+"+5+5")
canvas = Canvas(root, width=WW, height=HH)
canvas.pack()

r = 300
vectors = 1000
midx,midy = 600,360
TWO_PI = math.pi*2

def radial_ref(angles=360): # 2500
    d = {}
    d2bn = 0
    if angles:
        d2bn = 360.0/angles
    for angle in range(angles):
        a = angle
        a = a*d2bn
        x = math.sin(math.radians(a))
        y = math.cos(math.radians(a))
        d[angle] = x,y
    print len(d)
    return d

class Slider:
    def __init__(self, master=None, label='', value=0.0, min=0.0, max=100):
        slist.append(0)
        slist[-1] = DoubleVar()
        s = Scale(  master,
                    label=label,
                    variable=slist[-1],
                    from_=min*1.0,
                    to=max*1.0,
                    orient=HORIZONTAL,
                    length=max)
        slist[-1].set(value)
        s.place(x=(len(slist)-1)*120,y=0)

slist = []
Slider(canvas, label='vector points', max=100, min=3)
Slider(canvas, label='radius', max=1000, min=10)

timer = 0
p = p2 = 0
while 1:
    vectors = int(slist[0].get())
    radius = int(slist[1].get())
    if p <> [vectors,radius]:
        timer = time.time()+0.3
        p = [vectors,radius]
    if p2 <> vectors and timer < time.time():
        PERIM = radial_ref(vectors)
        canvas.delete('all')
        points = []
        for i in range(vectors):
            x,y = PERIM[i]
            x *= radius
            y *= radius
            points += [WW-320+x,midy+y]
        canvas.create_line(points+[points[:2]],fill='blue')
        canvas.create_rectangle(midx-70,midy-20,midx+70,midy+20,outline='yellow',fill='yellow')
        canvas.create_text(midx,midy,text=vectors,font='arial 30',fill='blue')
        p2 = [vectors,radius]
    canvas.update()