Differential D163 Diff 474 release/scripts/freestyle/styles/anisotropic_diffusion.py

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release/scripts/freestyle/styles/anisotropic_diffusion.py

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				# ##### BEGIN GPL LICENSE BLOCK #####
				#
				# This program is free software; you can redistribute it and/or
				# modify it under the terms of the GNU General Public License
				# as published by the Free Software Foundation; either version 2
				# of the License, or (at your option) any later version.
				#
				# This program is distributed in the hope that it will be useful,
				# but WITHOUT ANY WARRANTY; without even the implied warranty of
				# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
				# GNU General Public License for more details.
				#
				# You should have received a copy of the GNU General Public License
				# along with this program; if not, write to the Free Software Foundation,
				# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
				#
				# ##### END GPL LICENSE BLOCK #####

				# Filename : anisotropic_diffusion.py
				# Author : Fredo Durand
				# Date : 12/08/2004
				# Purpose : Smoothes lines using an anisotropic diffusion scheme

				from freestyle.chainingiterators import ChainPredicateIterator
				from freestyle.predicates import (
				AndUP1D,
				ExternalContourUP1D,
				NotUP1D,
				Operators,
				QuantitativeInvisibilityUP1D,
				TrueBP1D,
				TrueUP1D,
				)
				from freestyle.shaders import (
				ConstantThicknessShader,
				IncreasingColorShader,
				SamplingShader,
				StrokeTextureShader,
				pyDiffusion2Shader,
				)
				from freestyle.types import Operators, Stroke


				# pyDiffusion2Shader parameters
				offset = 0.25
				nbIter = 30

				upred = AndUP1D(QuantitativeInvisibilityUP1D(0), ExternalContourUP1D())
				Operators.select(upred)
				bpred = TrueBP1D()
				Operators.bidirectional_chain(ChainPredicateIterator(upred, bpred), NotUP1D(upred))
				shaders_list = [
				ConstantThicknessShader(4),
				StrokeTextureShader("smoothAlpha.bmp", Stroke.OPAQUE_MEDIUM, False),
				SamplingShader(2),
				pyDiffusion2Shader(offset, nbIter),
				IncreasingColorShader(1, 0, 0, 1, 0, 1, 0, 1),
				]
				Operators.create(TrueUP1D(), shaders_list)