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#
# Filename : thickness_fof_depth_discontinuity.py
# Author : Stephane Grabli
# Date : 04/08/2005
# Purpose : Assigns to strokes a thickness that depends on the depth discontinuity
#
#############################################################################
#
# 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 ChainingIterators import *
from shaders import *
class pyDepthDiscontinuityThicknessShader(StrokeShader):
def __init__(self, min, max):
StrokeShader.__init__(self)
self.__min = float(min)
self.__max = float(max)
self.__func = ZDiscontinuityF0D()
def getName(self):
return "pyDepthDiscontinuityThicknessShader"
def shade(self, stroke):
it = stroke.strokeVerticesBegin()
z_min=0.0
z_max=1.0
a = (self.__max - self.__min)/(z_max-z_min)
b = (self.__min*z_max-self.__max*z_min)/(z_max-z_min)
it = stroke.strokeVerticesBegin()
while it.isEnd() == 0:
z = self.__func(it.castToInterface0DIterator())
thickness = a*z+b
it.getObject().attribute().setThickness(thickness, thickness)
it.increment()
Operators.select(QuantitativeInvisibilityUP1D(0))
Operators.bidirectionalChain(ChainSilhouetteIterator(), NotUP1D(QuantitativeInvisibilityUP1D(0)))
shaders_list = [
SamplingShader(1),
ConstantThicknessShader(3),
ConstantColorShader(0.0,0.0,0.0),
pyDepthDiscontinuityThicknessShader(0.8, 6)
]
Operators.create(TrueUP1D(), shaders_list)
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