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Add error message for ApplyFunction

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Grant Sanderson 2019-12-15 08:44:57 -08:00
parent 5cce05fc46
commit c74cfa3c5d
1 changed files with 4 additions and 1 deletions
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5
manimlib/animation/transform.py
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@ -230,7 +230,10 @@ class ApplyFunction(Transform):
super().__init__(mobject, **kwargs) super().__init__(mobject, **kwargs)
def create_target(self): def create_target(self):
return self.function(self.mobject.copy()) target = self.function(self.mobject.copy())
if not isinstance(target, Mobject):
raise Exception("Functions passed to ApplyFunction must return object of type Mobject")
return target
class ApplyMatrix(ApplyPointwiseFunction): class ApplyMatrix(ApplyPointwiseFunction):