Reverted all changes (i.e., deletion) in release/scripts/freestyle.

release/scripts/freestyle/style_modules/anisotropic_diffusion.py

@@ -0,0 +1,74 @@
+#
+#  Filename : anisotropic_diffusion.py
+#  Author   : Fredo Durand
+#  Date     : 12/08/2004
+#  Purpose  : Smoothes lines using an anisotropic diffusion scheme
+#
+#############################################################################  
+#
+#  Copyright (C) : Please refer to the COPYRIGHT file distributed 
+#  with this source distribution. 
+#
+#  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+#############################################################################
+
+from freestyle_init import *
+from logical_operators import *
+from PredicatesB1D import *
+from shaders import *
+from PredicatesU0D import *
+from math import *
+
+## thickness modifiers
+
+normalInfo=Normal2DF0D()
+curvatureInfo=Curvature2DAngleF0D()
+
+def edgestopping(x, sigma): 
+	return exp(- x*x/(2*sigma*sigma))
+
+class pyDiffusion2Shader(StrokeShader):
+	def __init__(self, lambda1, nbIter):
+		StrokeShader.__init__(self)
+		self._lambda = lambda1
+		self._nbIter = nbIter
+	def getName(self):
+		return "pyDiffusionShader"
+	def shade(self, stroke):
+		for i in range (1, self._nbIter):
+			it = stroke.strokeVerticesBegin()
+			while it.isEnd() == 0:
+				v=it.getObject()
+				p1 = v.getPoint()
+				p2 = normalInfo(it.castToInterface0DIterator())*self._lambda*curvatureInfo(it.castToInterface0DIterator())
+				v.setPoint(p1+p2)
+				it.increment()
+
+upred = AndUP1D(QuantitativeInvisibilityUP1D(0), ExternalContourUP1D())
+Operators.select( upred )
+bpred = TrueBP1D();
+Operators.bidirectionalChain(ChainPredicateIterator(upred, bpred), NotUP1D(upred) )
+shaders_list = 	[
+		ConstantThicknessShader(4),
+		StrokeTextureShader("smoothAlpha.bmp", Stroke.OPAQUE_MEDIUM, 0),
+		SamplingShader(2),
+		pyDiffusion2Shader(-0.03, 30), 
+		IncreasingColorShader(1.0,0.0,0.0,1, 0, 1, 0, 1)
+		]
+Operators.create(TrueUP1D(), shaders_list)
+
+
+