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fixed bug for reduce_across_dimension for mobs with empty submobs

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This commit is contained in:
Ben Hambrecht
2018-05-09 18:22:30 +02:00
parent fd002c13e6
commit 7ce5674126
1 changed files with 7 additions and 1 deletions
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8
mobject/mobject.py
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@ -467,6 +467,8 @@ class Mobject(Container):
# Background rectangle # Background rectangle
def add_background_rectangle(self, color=BLACK, opacity=0.75, **kwargs): def add_background_rectangle(self, color=BLACK, opacity=0.75, **kwargs):
# TODO, this does not behave well when the mobject has points,
# since it gets displayed on top
from mobject.shape_matchers import BackgroundRectangle from mobject.shape_matchers import BackgroundRectangle
self.background_rectangle = BackgroundRectangle( self.background_rectangle = BackgroundRectangle(
self, color=color, self, color=color,
@ -621,13 +623,17 @@ class Mobject(Container):
values = [] values = []
values += [ values += [
mob.reduce_across_dimension(points_func, reduce_func, dim) mob.reduce_across_dimension(points_func, reduce_func, dim)
for mob in self.submobjects for mob in self.nonempty_submobjects()
] ]
try: try:
return reduce_func(values) return reduce_func(values)
except: except:
return 0 return 0
def nonempty_submobjects(self):
return [submob for submob in self.submobjects
if len(submob.submobjects) != 0 or len(submob.points) != 0]
def get_merged_array(self, array_attr): def get_merged_array(self, array_attr):
result = None result = None
for mob in self.family_members_with_points(): for mob in self.family_members_with_points():