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# ##### BEGIN GPL LICENSE BLOCK #####
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# Filename : haloing.py
# Author : Stephane Grabli
# Date : 04/08/2005
# Purpose : This style module selects the lines that
# are connected (in the image) to a specific
# object and trims them in order to produce
# a haloing effect around the target shape
from Freestyle import ChainSilhouetteIterator, Id, IncreasingColorShader, IncreasingThicknessShader, \
Operators, QuantitativeInvisibilityUP1D, SamplingShader, TipRemoverShader, TrueUP1D
from PredicatesU1D import pyIsOccludedByUP1D
from logical_operators import AndUP1D, NotUP1D
from shaders import pyTVertexRemoverShader
# id corresponds to the id of the target object
# (accessed by SHIFT+click)
id = Id(3,0)
upred = AndUP1D(QuantitativeInvisibilityUP1D(0), pyIsOccludedByUP1D(id))
Operators.select(upred)
Operators.bidirectional_chain(ChainSilhouetteIterator(), NotUP1D(upred))
shaders_list = [
IncreasingThicknessShader(3, 5),
IncreasingColorShader(1,0,0, 1,0,1,0,1),
SamplingShader(1.0),
pyTVertexRemoverShader(),
TipRemoverShader(3.0),
]
Operators.create(TrueUP1D(), shaders_list)
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