forked from bartvdbraak/blender
69 lines
2.9 KiB
Python
69 lines
2.9 KiB
Python
# ##### 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 : long_anisotropically_dense.py
|
|
# Author : Stephane Grabli
|
|
# Date : 04/08/2005
|
|
# Purpose : Selects the lines that are long and have a high anisotropic
|
|
# a priori density and uses causal density
|
|
# to draw without cluttering. Ideally, half of the
|
|
# selected lines are culled using the causal density.
|
|
#
|
|
# ********************* WARNING *************************************
|
|
# ******** The Directional a priori density maps must ******
|
|
# ******** have been computed prior to using this style module ******
|
|
|
|
from freestyle import ChainSilhouetteIterator, ConstantColorShader, ConstantThicknessShader, DensityF1D, \
|
|
IntegrationType, Operators, QuantitativeInvisibilityUP1D, SamplingShader, UnaryPredicate1D
|
|
from PredicatesB1D import pyLengthBP1D
|
|
from PredicatesU1D import pyHighDensityAnisotropyUP1D, pyHigherLengthUP1D
|
|
from logical_operators import NotUP1D
|
|
|
|
## custom density predicate
|
|
class pyDensityUP1D(UnaryPredicate1D):
|
|
def __init__(self, wsize, threshold, integration=IntegrationType.MEAN, sampling=2.0):
|
|
UnaryPredicate1D.__init__(self)
|
|
self._wsize = wsize
|
|
self._threshold = threshold
|
|
self._integration = integration
|
|
self._func = DensityF1D(self._wsize, self._integration, sampling)
|
|
self._func2 = DensityF1D(self._wsize, IntegrationType.MAX, sampling)
|
|
def __call__(self, inter):
|
|
c = self._func(inter)
|
|
m = self._func2(inter)
|
|
if c < self._threshold:
|
|
return 1
|
|
if m > 4*c:
|
|
if c < 1.5*self._threshold:
|
|
return 1
|
|
return 0
|
|
|
|
Operators.select(QuantitativeInvisibilityUP1D(0))
|
|
Operators.bidirectional_chain(ChainSilhouetteIterator(),NotUP1D(QuantitativeInvisibilityUP1D(0)))
|
|
Operators.select(pyHigherLengthUP1D(40))
|
|
## selects lines having a high anisotropic a priori density
|
|
Operators.select(pyHighDensityAnisotropyUP1D(0.3,4))
|
|
Operators.sort(pyLengthBP1D())
|
|
shaders_list = [
|
|
SamplingShader(2.0),
|
|
ConstantThicknessShader(2),
|
|
ConstantColorShader(0.2,0.2,0.25,1),
|
|
]
|
|
## uniform culling
|
|
Operators.create(pyDensityUP1D(3.0,2.0e-2, IntegrationType.MEAN, 0.1), shaders_list)
|