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Add to OpeningManimExample

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This commit is contained in:
Grant Sanderson
2021-01-07 16:38:08 -08:00
parent 7db1f7786a
commit 488387f1de
1 changed files with 29 additions and 11 deletions
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40
example_scenes.py
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@ -1,5 +1,3 @@
#!/usr/bin/env python
from manimlib.imports import * from manimlib.imports import *
# To watch one of these scenes, run the following: # To watch one of these scenes, run the following:
@ -32,11 +30,15 @@ class OpeningManimExample(Scene):
) )
self.wait() self.wait()
fade_comment = TextMobject(""" fade_comment = TextMobject(
You probably don't want to over use\\\\ """
You probably don't want to overuse\\\\
Transforms, though, a simple fade often\\\\ Transforms, though, a simple fade often\\\\
looks nicer. looks nicer.
""") """,
font_size=36,
color=GREY_B,
)
fade_comment.next_to( fade_comment.next_to(
transform_title, DOWN, transform_title, DOWN,
buff=LARGE_BUFF, buff=LARGE_BUFF,
@ -45,7 +47,7 @@ class OpeningManimExample(Scene):
self.play(FadeIn(fade_comment, shift=DOWN)) self.play(FadeIn(fade_comment, shift=DOWN))
self.wait(3) self.wait(3)
grid = NumberPlane() grid = NumberPlane((-10, 10), (-5, 5))
grid_title = TextMobject( grid_title = TextMobject(
"But manim is for illustrating math, not text", "But manim is for illustrating math, not text",
) )
@ -61,19 +63,35 @@ class OpeningManimExample(Scene):
) )
self.wait() self.wait()
matrix = [[1, 1], [0, 1]]
linear_transform_title = VGroup(
TextMobject("This is what the matrix"),
IntegerMatrix(matrix, include_background_rectangle=True),
TextMobject("looks like")
)
linear_transform_title.arrange(RIGHT)
linear_transform_title.to_edge(UP)
self.play(
FadeOut(grid_title),
FadeIn(linear_transform_title),
)
self.play(grid.apply_matrix, matrix, run_time=3)
self.wait()
grid_transform_title = TextMobject( grid_transform_title = TextMobject(
"This is a non-linear function applied to the grid" "And this is a nonlinear transformation"
) )
grid_transform_title.set_stroke(BLACK, 5, background=True) grid_transform_title.set_stroke(BLACK, 5, background=True)
grid_transform_title.to_edge(UP) grid_transform_title.to_edge(UP)
grid.prepare_for_nonlinear_transform() grid.prepare_for_nonlinear_transform(100)
self.play( self.play(
ApplyPointwiseFunction( ApplyPointwiseFunction(
lambda p: p + np.array([np.sin(p[1]), np.sin(p[0]), 0]), lambda p: p + np.array([np.sin(p[1]), np.sin(p[0]), 0]),
grid, grid,
run_time=5, run_time=5,
), ),
FadeOut(grid_title), FadeOut(linear_transform_title),
FadeIn(grid_transform_title), FadeIn(grid_transform_title),
) )
self.wait() self.wait()
@ -261,8 +279,8 @@ class SurfaceExample(Scene):
# the light. These can be either urls, or paths to a local file # the light. These can be either urls, or paths to a local file
# in whatever you've set as the iamge directory in # in whatever you've set as the iamge directory in
# the custom_defaults.yml file # the custom_defaults.yml file
day_texture = "https://upload.wikimedia.org/wikipedia/commons/4/4d/Whole_world_-_land_and_oceans.jpg" day_texture = "https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Whole_world_-_land_and_oceans.jpg/1280px-Whole_world_-_land_and_oceans.jpg"
night_texture = "https://upload.wikimedia.org/wikipedia/commons/b/ba/The_earth_at_night.jpg" night_texture = "https://upload.wikimedia.org/wikipedia/commons/thumb/b/ba/The_earth_at_night.jpg/1280px-The_earth_at_night.jpg"
surfaces = [ surfaces = [
TexturedSurface(surface, day_texture, night_texture) TexturedSurface(surface, day_texture, night_texture)
for surface in [sphere, torus1, torus2] for surface in [sphere, torus1, torus2]