forked from bartvdbraak/blender
75 lines
2.4 KiB
Python
75 lines
2.4 KiB
Python
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#
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# Filename : anisotropic_diffusion.py
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# Author : Fredo Durand
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# Date : 12/08/2004
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# Purpose : Smoothes lines using an anisotropic diffusion scheme
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#
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#############################################################################
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#
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# Copyright (C) : Please refer to the COPYRIGHT file distributed
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# with this source distribution.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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#############################################################################
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from freestyle_init import *
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from logical_operators import *
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from PredicatesB1D import *
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from shaders import *
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from PredicatesU0D import *
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from math import *
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## thickness modifiers
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normalInfo=Normal2DF0D()
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curvatureInfo=Curvature2DAngleF0D()
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def edgestopping(x, sigma):
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return exp(- x*x/(2*sigma*sigma))
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class pyDiffusion2Shader(StrokeShader):
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def __init__(self, lambda1, nbIter):
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StrokeShader.__init__(self)
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self._lambda = lambda1
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self._nbIter = nbIter
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def getName(self):
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return "pyDiffusionShader"
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def shade(self, stroke):
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for i in range (1, self._nbIter):
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it = stroke.strokeVerticesBegin()
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while it.isEnd() == 0:
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v=it.getObject()
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p1 = v.getPoint()
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p2 = normalInfo(it.castToInterface0DIterator())*self._lambda*curvatureInfo(it.castToInterface0DIterator())
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v.setPoint(p1+p2)
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it.increment()
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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.bidirectionalChain(ChainPredicateIterator(upred, bpred), NotUP1D(upred) )
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shaders_list = [
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ConstantThicknessShader(4),
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StrokeTextureShader("smoothAlpha.bmp", Stroke.OPAQUE_MEDIUM, 0),
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SamplingShader(2),
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pyDiffusion2Shader(-0.03, 30),
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IncreasingColorShader(1.0,0.0,0.0,1, 0, 1, 0, 1)
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]
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Operators.create(TrueUP1D(), shaders_list)
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