mirror of
https://github.com/3b1b/manim.git
synced 2025-08-05 16:49:03 +00:00
100 lines
2.5 KiB
Python
100 lines
2.5 KiB
Python
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from mobject.tex_mobject import TexMobject
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from mobject import Mobject
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from mobject.image_mobject import ImageMobject
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from mobject.vectorized_mobject import VMobject
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from animation.animation import Animation
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from animation.transform import *
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from animation.simple_animations import *
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from animation.playground import *
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from topics.geometry import *
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from topics.characters import *
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from topics.functions import *
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from topics.number_line import *
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from topics.combinatorics import *
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from scene import Scene
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from camera import Camera
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from mobject.svg_mobject import *
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from mobject.tex_mobject import *
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from mobject.vectorized_mobject import *
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from eola.matrix import *
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from eola.two_d_space import *
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class OpeningQuote(Scene):
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def construct(self):
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words = TextMobject("""
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Mathematics requires a small dose, not of genius, \\\\
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but of an imaginative freedom which, in a larger \\\\
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dose, would be insanity.
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""")
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words.to_edge(UP)
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for mob in words.submobjects[49:49+18]:
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mob.highlight(GREEN)
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words.show()
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author = TextMobject("-Angus K. Rodgers")
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author.highlight(YELLOW)
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author.next_to(words, DOWN, buff = 0.5)
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self.play(FadeIn(words))
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self.dither(3)
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self.play(Write(author, run_time = 3))
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self.dither()
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class CoordinatesWereFamiliar(TeacherStudentsScene):
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def construct(self):
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self.setup()
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self.student_says("I know this already")
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self.random_blink()
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self.teacher_says("Ah, but there is a subtlety")
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self.random_blink()
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self.dither()
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class CoordinatesAsScalars(VectorScene):
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def construct(self):
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self.add_axes()
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vector = self.add_vector([3, -2])
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array, x_line, y_line = self.vector_to_coords(vector)
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self.add(array)
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self.dither()
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self.general_idea_of_scalars(array)
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def general_idea_of_scalars(self, array):
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starting_mobjects = self.get_mobjects()
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starting_mobjects.remove(array)
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title = TextMobject("Think of each coordinate as a scalar")
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title.to_edge(UP)
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x, y = array.get_mob_matrix().flatten()
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new_x = x.copy().scale(2).highlight(X_COLOR)
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new_x.move_to(3*LEFT+2*UP)
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new_y = y.copy().scale(2).highlight(Y_COLOR)
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new_y.move_to(3*RIGHT+2*UP)
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self.play(
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FadeOut(*starting_mobjects)
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Transform(x, new_x),
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Transform(y, new_y),
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Write(title),
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)
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