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# SPDX-License-Identifier: GPL-2.0-or-later
# Filename : contour.py
# Author : Stephane Grabli
# Date : 04/08/2005
# Purpose : Draws each object's visible contour
from freestyle.chainingiterators import ChainPredicateIterator
from freestyle.predicates import (
AndUP1D,
ContourUP1D,
NotUP1D,
QuantitativeInvisibilityUP1D,
SameShapeIdBP1D,
TrueUP1D,
)
from freestyle.shaders import (
ConstantThicknessShader,
IncreasingColorShader,
)
from freestyle.types import Operators
Operators.select(AndUP1D(QuantitativeInvisibilityUP1D(0), ContourUP1D()))
bpred = SameShapeIdBP1D()
upred = AndUP1D(QuantitativeInvisibilityUP1D(0), ContourUP1D())
Operators.bidirectional_chain(ChainPredicateIterator(upred, bpred), NotUP1D(QuantitativeInvisibilityUP1D(0)))
shaders_list = [
ConstantThicknessShader(5.0),
IncreasingColorShader(0.8, 0, 0, 1, 0.1, 0, 0, 1),
]
Operators.create(TrueUP1D(), shaders_list)
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