52 lines
2.1 KiB
Python
52 lines
2.1 KiB
Python
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#
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# Filename : multiple_parameterization.py
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# Author : Stephane Grabli
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# Date : 04/08/2005
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# Purpose : The thickness and the color of the strokes vary continuously
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# independently from occlusions although only
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# visible lines are actually drawn. This is equivalent
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# to assigning the thickness using a parameterization covering
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# the complete silhouette (visible+invisible) and drawing
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# the strokes using a second parameterization that only
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# covers the visible portions.
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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 ChainingIterators import *
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from shaders import *
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Operators.select(QuantitativeInvisibilityUP1D(0))
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## Chain following the same nature, but without the restriction
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## of staying inside the selection (0).
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Operators.bidirectionalChain(ChainSilhouetteIterator(0))
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shaders_list = [
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SamplingShader(20),
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IncreasingThicknessShader(1.5, 30),
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ConstantColorShader(0.0,0.0,0.0),
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IncreasingColorShader(1,0,0,1,0,1,0,1),
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TextureAssignerShader(-1),
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pyHLRShader() ## this shader draws only visible portions
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]
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Operators.create(TrueUP1D(), shaders_list)
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