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Corrected get_arc_center()

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Ben Hambrecht 2018-01-19 17:30:39 -08:00
parent b7bbc75b98
commit 7598f469c0
1 changed files with 24 additions and 5 deletions
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29
topics/geometry.py
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@ -11,7 +11,7 @@ class Arc(VMobject):
"anchors_span_full_range" : True, "anchors_span_full_range" : True,
} }
def __init__(self, angle, **kwargs): def __init__(self, angle, **kwargs):
digest_locals(self) self.angle = angle
VMobject.__init__(self, **kwargs) VMobject.__init__(self, **kwargs)
def generate_points(self): def generate_points(self):
@ -113,12 +113,31 @@ class AnnularSector(VMobject):
self.add_control_points(arc2.points[1:]) self.add_control_points(arc2.points[1:])
self.add_control_points(a2_to_a1_points[1:]) self.add_control_points(a2_to_a1_points[1:])
def get_arc_center(self):
first_point = self.points[0]
last_point = self.points[-2]
v = last_point - first_point
radial_unit_vector = v/np.linalg.norm(v)
arc_center = first_point - self.inner_radius * radial_unit_vector
# radial_unit_vector = np.array([np.cos(self.start_angle),
# np.sin(self.start_angle), 0])
# arc_center = inner_arc_start_point - inner_arc.radius * radial_unit_vector
return arc_center
class Sector(AnnularSector): class Sector(AnnularSector):
def __init__(self, radius = 1, **kwargs): CONFIG = {
self.radius = radius "outer_radius" : 1,
self.inner_radius = 0 "inner_radius" : 0
AnnularSector.__init__(self,**kwargs) }
@property @property
def radius(self): def radius(self):