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#  Filename : apriori_density.py
#  Author   : Stephane Grabli
#  Date     : 04/08/2005
#  Purpose  : Draws lines having a high a priori density

from freestyle import ChainPredicateIterator, ConstantColorShader, ConstantThicknessShader, Operators, \
    QuantitativeInvisibilityUP1D, TrueBP1D, TrueUP1D
from PredicatesU1D import pyHighViewMapDensityUP1D
from logical_operators import AndUP1D, NotUP1D

Operators.select(AndUP1D(QuantitativeInvisibilityUP1D(0), pyHighViewMapDensityUP1D(0.1,5)))
bpred = TrueBP1D()
upred = AndUP1D(QuantitativeInvisibilityUP1D(0), pyHighViewMapDensityUP1D(0.0007,5))
Operators.bidirectional_chain(ChainPredicateIterator(upred, bpred), NotUP1D(QuantitativeInvisibilityUP1D(0)))
shaders_list = 	[
		ConstantThicknessShader(2), 
		ConstantColorShader(0.0, 0.0, 0.0,1)
		]
Operators.create(TrueUP1D(), shaders_list)
