def shade(self, stroke):
delta_t = self.thickness_max - self.thickness_min
fac = pow(self.k2 - self.k1, -1)
for svert in stroke:
curvatures = svert.first_svertex.curvatures
c1 = abs(curvatures[4]) if curvatures is not None else None
curvatures = svert.second_svertex.curvatures
c2 = abs(curvatures[4]) if curvatures is not None else None
if (c1 or c2) is None:
svert.attribute.thickness = (0.0, 0.0)
continue
if None not in {c1, c2}:
Kr = c1 + svert.t2d * (c2 - c1)
else:
Kr = c1 if c1 is not None else c2
if self.thickness_min <= Kr <= self.thickness_max:
self.thickness_min + delta_t * (Kr - self.k1) * fac
else:
bound(self.thickness_min, Kr, self.thickness_max)
svert.attribute.thickness = (Kr / 2, Kr / 2)
def curvature(self, stroke):
for K in stroke_curvature(iter(stroke)):
K = bound(-5, x, 5) / 3
t = (1.0 - K) * self.thickness.min + K * self.thickness.max
t = 0.0 if t < 1e-6 else t
if t < 1:
t /= 10
yield round(1.0 - t, 5)
def shade(self, stroke):
it = Interface0DIterator(stroke)
delta_threshold = self.threshold_max - self.threshold_min
delta_thickness = self._thicknessMax - self._thicknessMin
for svert in it:
c = self._func(it)
c = bound(self.threshold_min, c, self.threshold_max)
t = (self.threshold_max - c) / delta_threshold * delta_thickness + self._thicknessMin
svert.attribute.thickness = (t / 2.0, t / 2.0)
def shade(self, stroke):
it = Interface0DIterator(stroke)
delta_threshold = self.threshold_max - self.threshold_min
delta_thickness = self._thicknessMax - self._thicknessMin
for svert in it:
c = self._func(it)
c = bound(self.threshold_min, c, self.threshold_max)
t = (self.threshold_max - c) / delta_threshold * delta_thickness + self._thicknessMin
svert.attribute.thickness = (t / 2.0, t / 2.0)
def __call__(self, i1, i2):
sv1a = i1.first_fedge.first_svertex.point_2d
sv1b = i1.last_fedge.second_svertex.point_2d
sv2a = i2.first_fedge.first_svertex.point_2d
sv2b = i2.last_fedge.second_svertex.point_2d
if (sv1a - sv2a).length < 1e-6:
dir1 = sv1a - sv1b
dir2 = sv2b - sv2a
elif (sv1b - sv2b).length < 1e-6:
dir1 = sv1b - sv1a
dir2 = sv2a - sv2b
elif (sv1a - sv2b).length < 1e-6:
dir1 = sv1a - sv1b
dir2 = sv2a - sv2b
elif (sv1b - sv2a).length < 1e-6:
dir1 = sv1b - sv1a
dir2 = sv2b - sv2a
else:
return False
denom = dir1.length * dir2.length
if denom < 1e-6:
return False
x = (dir1 * dir2) / denom
return acos(bound(-1.0, x, 1.0)) > self.angle
def __call__(self, i1, i2):
sv1a = i1.first_fedge.first_svertex.point_2d
sv1b = i1.last_fedge.second_svertex.point_2d
sv2a = i2.first_fedge.first_svertex.point_2d
sv2b = i2.last_fedge.second_svertex.point_2d
if (sv1a - sv2a).length < 1e-6:
dir1 = sv1a - sv1b
dir2 = sv2b - sv2a
elif (sv1b - sv2b).length < 1e-6:
dir1 = sv1b - sv1a
dir2 = sv2a - sv2b
elif (sv1a - sv2b).length < 1e-6:
dir1 = sv1a - sv1b
dir2 = sv2a - sv2b
elif (sv1b - sv2a).length < 1e-6:
dir1 = sv1b - sv1a
dir2 = sv2b - sv2a
else:
return False
denom = dir1.length * dir2.length
if denom < 1e-6:
return False
x = (dir1 * dir2) / denom
return acos(bound(-1.0, x, 1.0)) > self.angle
def shade(self, stroke):
for svert in stroke:
alpha = svert.attribute.alpha
alpha = bound(self.__min, alpha * svert.point.y * 0.0025,
self.__max)
svert.attribute.alpha = alpha
def shade(self, stroke):
for svert in stroke:
alpha = svert.attribute.alpha
alpha = bound(self.__min, alpha * svert.point.y * 0.0025, self.__max)
svert.attribute.alpha = alpha
