#!/usr/bin/env python
from bezmisc import *
from ffgeom import *

def maxdist(((p0x,p0y),(p1x,p1y),(p2x,p2y),(p3x,p3y))):
	p0 = Point(p0x,p0y)
	p1 = Point(p1x,p1y)
	p2 = Point(p2x,p2y)
	p3 = Point(p3x,p3y)

	s1 = Segment(p0,p3)
	return max(s1.distanceToPoint(p1),s1.distanceToPoint(p2))
	

def cspsubdiv(csp,flat):
	for sp in csp:
		subdiv(sp,flat)

def subdiv(sp,flat,i=1):
	p0 = sp[i-1][1]
	p1 = sp[i-1][2]
	p2 = sp[i][0]
	p3 = sp[i][1]
	
	b = (p0,p1,p2,p3)
	m = maxdist(b)
	if m <= flat:
		try:
			subdiv(sp,flat,i+1)
		except IndexError:
			pass
	else:
		one, two = beziersplitatt(b,0.5)
		sp[i-1][2] = one[1]
		sp[i][0] = two[2]
		p = [one[2],one[3],two[1]]
		sp[i:1] = [p]	
		subdiv(sp,flat,i)
		
