forked from bartvdbraak/blender
5841d1c814
Suggested by Sergey Sharybin through a code review of the branch. The information was mostly recovered from the AUTHORS file [1] of the stand-alone Freestyle package version 2.2.0. [1] http://freestyle.cvs.sourceforge.net/viewvc/freestyle/freestyle/AUTHORS.TXT
106 lines
3.9 KiB
Python
106 lines
3.9 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 : Functions0D.py
|
|
# Authors : Fredo Durand, Stephane Grabli, Francois Sillion, Emmanuel Turquin
|
|
# Date : 30/06/2005
|
|
# Purpose : Functions (functors) to be used for 0D elements
|
|
|
|
from Freestyle import Curvature2DAngleF0D, CurvePoint, ReadCompleteViewMapPixelF0D, \
|
|
ReadSteerableViewMapPixelF0D, UnaryFunction0DDouble, UnaryFunction0DMaterial, \
|
|
UnaryFunction0DVec2f
|
|
from Freestyle import ContextFunctions as CF
|
|
|
|
import math
|
|
import mathutils
|
|
|
|
class CurveMaterialF0D(UnaryFunction0DMaterial):
|
|
# A replacement of the built-in MaterialF0D for stroke creation.
|
|
# MaterialF0D does not work with Curves and Strokes.
|
|
def __call__(self, inter):
|
|
cp = inter.object
|
|
assert(isinstance(cp, CurvePoint))
|
|
fe = cp.first_svertex.get_fedge(cp.second_svertex)
|
|
assert(fe is not None)
|
|
return fe.material if fe.is_smooth else fe.material_left
|
|
|
|
class pyInverseCurvature2DAngleF0D(UnaryFunction0DDouble):
|
|
def __call__(self, inter):
|
|
func = Curvature2DAngleF0D()
|
|
c = func(inter)
|
|
return (3.1415 - c)
|
|
|
|
class pyCurvilinearLengthF0D(UnaryFunction0DDouble):
|
|
def __call__(self, inter):
|
|
cp = inter.object
|
|
assert(isinstance(cp, CurvePoint))
|
|
return cp.t2d
|
|
|
|
## estimate anisotropy of density
|
|
class pyDensityAnisotropyF0D(UnaryFunction0DDouble):
|
|
def __init__(self,level):
|
|
UnaryFunction0DDouble.__init__(self)
|
|
self.IsoDensity = ReadCompleteViewMapPixelF0D(level)
|
|
self.d0Density = ReadSteerableViewMapPixelF0D(0, level)
|
|
self.d1Density = ReadSteerableViewMapPixelF0D(1, level)
|
|
self.d2Density = ReadSteerableViewMapPixelF0D(2, level)
|
|
self.d3Density = ReadSteerableViewMapPixelF0D(3, level)
|
|
def __call__(self, inter):
|
|
c_iso = self.IsoDensity(inter)
|
|
c_0 = self.d0Density(inter)
|
|
c_1 = self.d1Density(inter)
|
|
c_2 = self.d2Density(inter)
|
|
c_3 = self.d3Density(inter)
|
|
cMax = max(max(c_0,c_1), max(c_2,c_3))
|
|
cMin = min(min(c_0,c_1), min(c_2,c_3))
|
|
if c_iso == 0:
|
|
v = 0
|
|
else:
|
|
v = (cMax-cMin)/c_iso
|
|
return v
|
|
|
|
## Returns the gradient vector for a pixel
|
|
## l
|
|
## the level at which one wants to compute the gradient
|
|
class pyViewMapGradientVectorF0D(UnaryFunction0DVec2f):
|
|
def __init__(self, l):
|
|
UnaryFunction0DVec2f.__init__(self)
|
|
self._l = l
|
|
self._step = math.pow(2,self._l)
|
|
def __call__(self, iter):
|
|
p = iter.object.point_2d
|
|
gx = CF.read_complete_view_map_pixel(self._l, int(p.x+self._step), int(p.y)) - \
|
|
CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y))
|
|
gy = CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y+self._step)) - \
|
|
CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y))
|
|
return mathutils.Vector([gx, gy])
|
|
|
|
class pyViewMapGradientNormF0D(UnaryFunction0DDouble):
|
|
def __init__(self, l):
|
|
UnaryFunction0DDouble.__init__(self)
|
|
self._l = l
|
|
self._step = math.pow(2,self._l)
|
|
def __call__(self, iter):
|
|
p = iter.object.point_2d
|
|
gx = CF.read_complete_view_map_pixel(self._l, int(p.x+self._step), int(p.y)) - \
|
|
CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y))
|
|
gy = CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y+self._step)) - \
|
|
CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y))
|
|
grad = mathutils.Vector([gx, gy])
|
|
return grad.length
|