42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
# SPDX-FileCopyrightText: 2008-2023 Blender Authors
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Author : Fredo Durand
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# Date : 12/08/2004
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# Purpose : Smooth lines using an anisotropic diffusion scheme
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from freestyle.chainingiterators import ChainPredicateIterator
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from freestyle.predicates import (
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AndUP1D,
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ExternalContourUP1D,
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NotUP1D,
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QuantitativeInvisibilityUP1D,
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TrueBP1D,
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TrueUP1D,
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)
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from freestyle.shaders import (
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ConstantThicknessShader,
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IncreasingColorShader,
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SamplingShader,
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pyDiffusion2Shader,
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)
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from freestyle.types import Operators, Stroke
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# pyDiffusion2Shader parameters
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offset = 0.25
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nbIter = 30
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upred = AndUP1D(QuantitativeInvisibilityUP1D(0), ExternalContourUP1D())
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Operators.select(upred)
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bpred = TrueBP1D()
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Operators.bidirectional_chain(ChainPredicateIterator(upred, bpred), NotUP1D(upred))
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shaders_list = [
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ConstantThicknessShader(4),
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SamplingShader(2),
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pyDiffusion2Shader(offset, nbIter),
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IncreasingColorShader(1, 0, 0, 1, 0, 1, 0, 1),
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]
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Operators.create(TrueUP1D(), shaders_list)
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