polymerchm

# coding: utf-8

import math
import ui

def getAngle(a,b): # a = start, b = finish
	theta =  math.atan2(b[1]-a[1], b[0]-a[0])
	if theta < 0:
		theta -= math.pi/2
	elif theta >= 0:

polymerchm

# coding: utf-8

import math
import ui

def getAngle(a,b): # a = start, b = finish
	theta =  math.atan2(b[1]-a[1], b[0]-a[0])
	if theta < 0:
		theta -= math.pi/2
	elif theta >= 0: