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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 #####
"""
Functions operating on vertices (0D elements) and polylines (1D
elements). Also intended to be a collection of examples for predicate
definition in Python.
"""
# module members
from _freestyle import (
ChainingTimeStampF1D,
Curvature2DAngleF0D,
Curvature2DAngleF1D,
CurveNatureF0D,
CurveNatureF1D,
DensityF0D,
DensityF1D,
GetCompleteViewMapDensityF1D,
GetCurvilinearAbscissaF0D,
GetDirectionalViewMapDensityF1D,
GetOccludeeF0D,
GetOccludeeF1D,
GetOccludersF0D,
GetOccludersF1D,
GetParameterF0D,
GetProjectedXF0D,
GetProjectedXF1D,
GetProjectedYF0D,
GetProjectedYF1D,
GetProjectedZF0D,
GetProjectedZF1D,
GetShapeF0D,
GetShapeF1D,
GetSteerableViewMapDensityF1D,
GetViewMapGradientNormF0D,
GetViewMapGradientNormF1D,
GetXF0D,
GetXF1D,
GetYF0D,
GetYF1D,
GetZF0D,
GetZF1D,
IncrementChainingTimeStampF1D,
LocalAverageDepthF0D,
LocalAverageDepthF1D,
MaterialF0D,
Normal2DF0D,
Normal2DF1D,
Orientation2DF1D,
Orientation3DF1D,
QuantitativeInvisibilityF0D,
QuantitativeInvisibilityF1D,
ReadCompleteViewMapPixelF0D,
ReadMapPixelF0D,
ReadSteerableViewMapPixelF0D,
ShapeIdF0D,
TimeStampF1D,
VertexOrientation2DF0D,
VertexOrientation3DF0D,
ZDiscontinuityF0D,
ZDiscontinuityF1D,
)
# constructs for function definition in Python
from freestyle.types import (
CurvePoint,
IntegrationType,
UnaryFunction0DDouble,
UnaryFunction0DMaterial,
UnaryFunction0DVec2f,
UnaryFunction1DDouble,
)
from freestyle.utils import ContextFunctions as CF
from freestyle.utils import integrate
from mathutils import Vector
# -- Functions for 0D elements (vertices) -- #
class CurveMaterialF0D(UnaryFunction0DMaterial):
"""
A replacement of the built-in MaterialF0D for stroke creation.
MaterialF0D does not work with Curves and Strokes. Line color
priority is used to pick one of the two materials at material
boundaries.
Note: expects instances of CurvePoint to be iterated over
"""
def __call__(self, inter):
fe = inter.object.fedge
assert(fe is not None), "CurveMaterialF0D: fe is None"
if fe.is_smooth:
return fe.material
else:
right, left = fe.material_right, fe.material_left
return right if (right.priority > left.priority) else 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
class pyDensityAnisotropyF0D(UnaryFunction0DDouble):
"""Estimates the anisotropy of density."""
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))
return 0 if (c_iso == 0) else (cMax - cMin) / c_iso
class pyViewMapGradientVectorF0D(UnaryFunction0DVec2f):
"""Returns the gradient vector for a pixel.
:arg level: the level at which to compute the gradient
:type level: int
"""
def __init__(self, level):
UnaryFunction0DVec2f.__init__(self)
self._l = level
self._step = 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 Vector((gx, gy))
class pyViewMapGradientNormF0D(UnaryFunction0DDouble):
def __init__(self, l):
UnaryFunction0DDouble.__init__(self)
self._l = l
self._step = 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 Vector((gx, gy)).length
# -- Functions for 1D elements (curves) -- #
class pyGetInverseProjectedZF1D(UnaryFunction1DDouble):
def __call__(self, inter):
func = GetProjectedZF1D()
z = func(inter)
return (1.0 - z)
class pyGetSquareInverseProjectedZF1D(UnaryFunction1DDouble):
def __call__(self, inter):
func = GetProjectedZF1D()
z = func(inter)
return (1.0 - pow(z, 2))
class pyDensityAnisotropyF1D(UnaryFunction1DDouble):
def __init__(self, level, integrationType=IntegrationType.MEAN, sampling=2.0):
UnaryFunction1DDouble.__init__(self, integrationType)
self._func = pyDensityAnisotropyF0D(level)
self._integration = integrationType
self._sampling = sampling
def __call__(self, inter):
v = integrate(self._func, inter.points_begin(self._sampling), inter.points_end(self._sampling), self._integration)
return v
class pyViewMapGradientNormF1D(UnaryFunction1DDouble):
def __init__(self, l, integrationType, sampling=2.0):
UnaryFunction1DDouble.__init__(self, integrationType)
self._func = pyViewMapGradientNormF0D(l)
self._integration = integrationType
self._sampling = sampling
def __call__(self, inter):
v = integrate(self._func, inter.points_begin(self._sampling), inter.points_end(self._sampling), self._integration)
return v
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