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# SPDX-License-Identifier: GPL-2.0-or-later
# Filename : invisible_lines.py
# Author : Stephane Grabli
# Date : 04/08/2005
# Purpose : Draws all lines whose Quantitative Invisibility
# is different from 0
from freestyle.chainingiterators import ChainSilhouetteIterator
from freestyle.predicates import (
NotUP1D,
QuantitativeInvisibilityUP1D,
TrueUP1D,
)
from freestyle.shaders import (
ConstantColorShader,
ConstantThicknessShader,
SamplingShader,
)
from freestyle.types import Operators
upred = NotUP1D(QuantitativeInvisibilityUP1D(0))
Operators.select(upred)
Operators.bidirectional_chain(ChainSilhouetteIterator(), NotUP1D(upred))
shaders_list = [
SamplingShader(5.0),
ConstantThicknessShader(3.0),
ConstantColorShader(0.7, 0.7, 0.7),
]
Operators.create(TrueUP1D(), shaders_list)
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