###############################################################################

#                                                                             #

# This file is part of a style sheet example from the Freestyle application   #

# Copyright (C) 2001-2004  Stephane Grabli (Stephane.Grabli@imag.fr)          #

#                                                                             #

# http://artis.imag.fr/Software/Freestyle                                     #

#                                                                             #

###############################################################################




from Freestyle import *
from Functions0D import *


class pyHigherCurvature2DAngleUP0D(UnaryPredicate0D):

	def __init__(self,a):

		UnaryPredicate0D.__init__(self)

		self._a = a

			

	def getName(self):

		return "HigherCurvature2DAngleUP0D"



	def __call__(self, inter):

		func = Curvature2DAngleF0D()

		a = func(inter)

		return ( a > self._a)



class pyUEqualsUP0D(UnaryPredicate0D):

	def __init__(self,u, w):

		UnaryPredicate0D.__init__(self)

		self._u = u

		self._w = w

			

	def getName(self):

		return "UEqualsUP0D"



	def __call__(self, inter):

		func = pyCurvilinearLengthF0D()

		u = func(inter)

		return ( ( u > (self._u-self._w) ) and ( u < (self._u+self._w) ) )



class pyVertexNatureUP0D(UnaryPredicate0D):

	def __init__(self,nature):

		UnaryPredicate0D.__init__(self)

		self._nature = nature

			

	def getName(self):

		return "pyVertexNatureUP0D"



	def __call__(self, inter):

		v = inter.getObject()

		nat = v.getNature()

		if(nat & self._nature):

			return 1;

		return 0



## check whether an Interface0DIterator

## is a TVertex and is the one that is 

## hidden (inferred from the context)

class pyBackTVertexUP0D(UnaryPredicate0D):

	def __init__(self):

		UnaryPredicate0D.__init__(self)

		self._getQI = QuantitativeInvisibilityF0D()

	def getName(self):

		return "pyBackTVertexUP0D"

	def __call__(self, iter):

		v = iter.getObject()

		nat = v.getNature()

		if(nat & T_VERTEX == 0):

			return 0

		next = iter

		if(next.isEnd()):

			return 0

		if(self._getQI(next) != 0):

			return 1

		return 0



class pyParameterUP0DGoodOne(UnaryPredicate0D):

	def __init__(self,pmin,pmax):

		UnaryPredicate0D.__init__(self)

		self._m = pmin

		self._M = pmax

		

	def getName(self):

		return "pyCurvilinearAbscissaHigherThanUP0D"



	def __call__(self, inter):

		u = inter.u()

		return ((u>=self._m) and (u<=self._M))



class pyParameterUP0D(UnaryPredicate0D):

	def __init__(self,pmin,pmax):

		UnaryPredicate0D.__init__(self)

		self._m = pmin

		self._M = pmax

		self._func = Curvature2DAngleF0D()

	def getName(self):

		return "pyCurvilinearAbscissaHigherThanUP0D"



	def __call__(self, inter):

		c = self._func(inter)

		b1 = (c>0.1)

		u = inter.u()

		b = ((u>=self._m) and (u<=self._M))

		return b and b1