1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
#
# 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 import *
from logical_operators import *
from PredicatesB1D import *
from shaders import *
from vector 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)
|
