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release/scripts/freestyle/styles/long_anisotropically_dense.py
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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 : 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.chainingiterators import ChainSilhouetteIterator | |||||
| from freestyle.functions import DensityF1D | |||||
| from freestyle.predicates import ( | |||||
| NotUP1D, | |||||
| QuantitativeInvisibilityUP1D, | |||||
| UnaryPredicate1D, | |||||
| pyHighDensityAnisotropyUP1D, | |||||
| pyHigherLengthUP1D, | |||||
| pyLengthBP1D, | |||||
| ) | |||||
| from freestyle.shaders import ( | |||||
| ConstantColorShader, | |||||
| ConstantThicknessShader, | |||||
| SamplingShader, | |||||
| ) | |||||
| from freestyle.types import IntegrationType, Operators | |||||
| ## 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) | |||||