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# SPDX-License-Identifier: GPL-2.0-or-later
# Filename : qi2.py
# Author : Stephane Grabli
# Date : 04/08/2005
# Purpose : Draws lines hidden by two surfaces.
# *** Quantitative Invisibility must have been
# enabled in the options dialog to use this style module ****
from freestyle.chainingiterators import ChainSilhouetteIterator
from freestyle.predicates import (
NotUP1D,
QuantitativeInvisibilityUP1D,
TrueUP1D,
)
from freestyle.shaders import (
ConstantColorShader,
ConstantThicknessShader,
SamplingShader,
)
from freestyle.types import Operators
Operators.select(QuantitativeInvisibilityUP1D(2))
Operators.bidirectional_chain(ChainSilhouetteIterator(), NotUP1D(QuantitativeInvisibilityUP1D(2)))
shaders_list = [
SamplingShader(10),
ConstantThicknessShader(1.5),
ConstantColorShader(0.7, 0.7, 0.7, 1),
]
Operators.create(TrueUP1D(), shaders_list)
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