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position_endpoint_ot

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This commit is contained in:
Grant Sanderson 2016-02-21 15:44:54 -08:00
parent 85d2c2173d
commit 9c2bb850fe
1 changed files with 15 additions and 1 deletions
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16
mobject/mobject.py
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@ -322,6 +322,20 @@ class Mobject(object):
self.center().shift(mobject.get_center()) self.center().shift(mobject.get_center())
return self return self
def position_endpoints_on(self, start, end):
curr_vect = self.points[-1] - self.points[0]
if np.all(curr_vect == 0):
raise Exception("Cannot position endpoints of closed loop")
target_vect = end - start
self.scale(np.linalg.norm(target_vect)/np.linalg.norm(curr_vect))
self.rotate(
angle_of_vector(target_vect) - \
angle_of_vector(curr_vect)
)
self.shift(start-self.points[0])
return self
def apply_complex_function(self, function): def apply_complex_function(self, function):
return self.apply_function( return self.apply_function(
lambda (x, y, z) : complex_to_R3(function(complex(x, y))) lambda (x, y, z) : complex_to_R3(function(complex(x, y)))
@ -509,7 +523,7 @@ class Mobject(object):
#TODO #TODO
Mobject.align_data(mobject1, mobject2) Mobject.align_data(mobject1, mobject2)
for attr in self.get_array_attrs(): for attr in self.get_array_attrs():
setattr(target_mobject, attr, interpolate( setattr(self, attr, interpolate(
getattr(mobject1, attr), getattr(mobject1, attr),
getattr(mobject2, attr), getattr(mobject2, attr),
alpha)) alpha))