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# SPDX-License-Identifier: GPL-2.0-or-later
# Filename : suggestive.py
# Author : Stephane Grabli
# Date : 04/08/2005
# Purpose : Draws the suggestive contours.
# ***** The suggestive contours must be enabled
# in the options dialog *****
from freestyle.chainingiterators import ChainSilhouetteIterator
from freestyle.predicates import (
AndUP1D,
NotUP1D,
QuantitativeInvisibilityUP1D,
TrueUP1D,
pyNatureUP1D,
)
from freestyle.shaders import (
ConstantColorShader,
IncreasingThicknessShader,
)
from freestyle.types import Nature, Operators
upred = AndUP1D(pyNatureUP1D(Nature.SUGGESTIVE_CONTOUR), QuantitativeInvisibilityUP1D(0))
Operators.select(upred)
Operators.bidirectional_chain(ChainSilhouetteIterator(), NotUP1D(upred))
shaders_list = [
IncreasingThicknessShader(1, 3),
ConstantColorShader(0.2, 0.2, 0.2, 1),
]
Operators.create(TrueUP1D(), shaders_list)
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