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little improvement to Mobject.scale

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TonyCrane
2021-08-03 15:25:13 +08:00
parent 9df58e4ddf
commit 3d5642f3d7
1 changed files with 13 additions and 6 deletions
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19
manimlib/mobject/mobject.py
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@ -561,7 +561,7 @@ class Mobject(object):
) )
return self return self
def scale(self, scale_factor, min_scale_factor=1e-8, **kwargs): def scale(self, scale_factor, min_scale_factor=1e-8, about_point=None, about_edge=ORIGIN, recurse=True):
""" """
Default behavior is to scale about the center of the mobject. Default behavior is to scale about the center of the mobject.
The argument about_edge can be a vector, indicating which side of The argument about_edge can be a vector, indicating which side of
@ -572,11 +572,18 @@ class Mobject(object):
respect to that point. respect to that point.
""" """
scale_factor = max(scale_factor, min_scale_factor) scale_factor = max(scale_factor, min_scale_factor)
self.apply_points_function( if about_point is None and about_edge is not None:
lambda points: scale_factor * points, about_point = self.get_bounding_box_point(about_edge)
works_on_bounding_box=True, if recurse:
**kwargs for submob in self.submobjects:
) submob.scale(scale_factor, about_point=about_point, recurse=True)
if not self.submobjects:
self.apply_points_function(
lambda points: scale_factor * points,
works_on_bounding_box=True,
about_point=about_point,
about_edge=about_edge
)
return self return self
def stretch(self, factor, dim, **kwargs): def stretch(self, factor, dim, **kwargs):