mirror of
https://github.com/3b1b/videos.git
synced 2025-08-05 16:48:47 +00:00
60 lines
1.6 KiB
Python
60 lines
1.6 KiB
Python
|
from imports_3b1b import *
|
||
|
|
|
||
|
|
|
||
|
|
class EarthMorph(Scene):
|
||
|
|
CONFIG = {
|
||
|
|
"camera_config": {
|
||
|
|
"apply_depth_test": True,
|
||
|
|
"samples": 8,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
def construct(self):
|
||
|
|
torus1 = Torus(r1=1, r2=1)
|
||
|
|
torus2 = Torus(r1=3, r2=1)
|
||
|
|
sphere = Sphere(radius=3, resolution=torus1.resolution)
|
||
|
|
earths = [
|
||
|
|
TexturedSurface(surface, "EarthTextureMap", "NightEarthTextureMap")
|
||
|
|
for surface in [sphere, torus1, torus2]
|
||
|
|
]
|
||
|
|
for mob in earths:
|
||
|
|
mob.mesh = SurfaceMesh(mob)
|
||
|
|
mob.mesh.set_stroke(BLUE, 1, opacity=0.5)
|
||
|
|
|
||
|
|
earth = earths[0]
|
||
|
|
|
||
|
|
self.camera.frame.set_rotation(
|
||
|
|
theta=-30 * DEGREES,
|
||
|
|
phi=70 * DEGREES,
|
||
|
|
)
|
||
|
|
|
||
|
|
self.add(earth)
|
||
|
|
self.play(ShowCreation(earth.mesh, lag_ratio=0.01, run_time=3))
|
||
|
|
for mob in earths:
|
||
|
|
mob.add(mob.mesh)
|
||
|
|
earth.save_state()
|
||
|
|
self.play(Rotate(earth, PI / 2), run_time=2)
|
||
|
|
for mob in earths[1:]:
|
||
|
|
mob.rotate(PI / 2)
|
||
|
|
|
||
|
|
self.play(
|
||
|
|
Transform(earth, earths[1]),
|
||
|
|
run_time=3
|
||
|
|
)
|
||
|
|
|
||
|
|
light = self.camera.light_source
|
||
|
|
frame = self.camera.frame
|
||
|
|
|
||
|
|
self.play(
|
||
|
|
Transform(earth, earths[2]),
|
||
|
|
frame.increment_phi, -10 * DEGREES,
|
||
|
|
frame.increment_theta, -20 * DEGREES,
|
||
|
|
run_time=3
|
||
|
|
)
|
||
|
|
frame.add_updater(lambda m, dt: m.increment_theta(-0.1 * dt))
|
||
|
|
self.add(light)
|
||
|
|
light.save_state()
|
||
|
|
self.play(light.move_to, 3 * IN, run_time=5)
|
||
|
|
self.play(light.shift, 10 * OUT, run_time=5)
|
||
|
|
self.wait(4)
|