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# SPDX-License-Identifier: GPL-2.0-or-later
# Filename : nature.py
# Author : Stephane Grabli
# Date : 04/08/2005
# Purpose : Uses the NatureUP1D predicate to select the lines
# of a given type (among Nature.SILHOUETTE, Nature.CREASE, Nature.SUGGESTIVE_CONTOURS,
# Nature.BORDERS).
# The suggestive contours must have been enabled in the
# options dialog to appear in the View Map.
from freestyle.chainingiterators import ChainSilhouetteIterator
from freestyle.predicates import (
NotUP1D,
TrueUP1D,
pyNatureUP1D,
)
from freestyle.shaders import (
IncreasingColorShader,
IncreasingThicknessShader,
)
from freestyle.types import Operators, Nature
Operators.select(pyNatureUP1D(Nature.SILHOUETTE))
Operators.bidirectional_chain(ChainSilhouetteIterator(), NotUP1D(pyNatureUP1D(Nature.SILHOUETTE)))
shaders_list = [
IncreasingThicknessShader(3, 10),
IncreasingColorShader(0.0, 0.0, 0.0, 1, 0.8, 0, 0, 1),
]
Operators.create(TrueUP1D(), shaders_list)
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