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Fixed PiCreature.look

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This commit is contained in:
Grant Sanderson 2018-08-11 18:01:50 -07:00
parent fb08fc0401
commit ab0dfe7854
1 changed files with 25 additions and 13 deletions
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38
for_3b1b_videos/pi_creature.py
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@ -1,5 +1,6 @@
import numpy as np
import warnings
import operator as op
from constants import *
@ -97,9 +98,24 @@ class PiCreature(SVGMobject):
self.mouth.set_fill(BLACK, opacity=1)
self.body.set_fill(self.color, opacity=1)
self.pupils.set_fill(BLACK, opacity=1)
self.pupils.set_stroke(DARK_GREY, width=1)
self.add_pupil_light_spot(self.pupils)
self.eyes.set_fill(WHITE, opacity=1)
return self
def add_pupil_light_spot(self, pupils):
# Purely an artifact of how the SVGs were drawn.
# In a perfect world, this wouldn't be needed
for pupil in pupils:
index = 16
sub_points = pupil.points[:index]
pupil.points = pupil.points[index + 2:]
circle = VMobject()
circle.points = sub_points
circle.set_stroke(width=0)
circle.set_fill(WHITE, 1)
pupil.add(circle)
def copy(self):
copy_mobject = SVGMobject.copy(self)
copy_mobject.name_parts()
@ -135,19 +151,15 @@ class PiCreature(SVGMobject):
direction /= norm
self.purposeful_looking_direction = direction
for pupil, eye in zip(self.pupils.split(), self.eyes.split()):
pupil_radius = pupil.get_width() / 2.
eye_radius = eye.get_width() / 2.
pupil.move_to(eye)
if direction[1] < 0:
pupil.shift(pupil_radius * DOWN / 3)
pupil.shift(direction * (eye_radius - pupil_radius))
bottom_diff = eye.get_bottom()[1] - pupil.get_bottom()[1]
if bottom_diff > 0:
pupil.shift(bottom_diff * UP)
# TODO, how to handle looking up...
# top_diff = eye.get_top()[1]-pupil.get_top()[1]
# if top_diff < 0:
# pupil.shift(top_diff*UP)
c = eye.get_center()
right = eye.get_right() - c
up = eye.get_top() - c
vect = direction[0] * right + direction[1] * up
v_norm = np.linalg.norm(vect)
p_radius = 0.5 * pupil.get_width()
vect *= (v_norm - p_radius) / v_norm
pupil.move_to(c + vect)
self.pupils[1].align_to(self.pupils[0], DOWN)
return self
def look_at(self, point_or_mobject):