Learn 3D Games in Python | Ursina Engine | Part-7 Solar System Animation

from ursina import *

def update():
    for i in l:
        i.rotation_y += 2

def input(key):
    if key == '1':
        camera.position=(0,0,-20)
        camera.rotation_x = 0

    if key == '2':
        camera.position=(0,20,0)
        camera.rotation_x = 90

    if key == '3':
        camera.position=(0,10,-17)
        camera.rotation_x = 30

app = Ursina()

sun = Entity(model="sphere", color=color.yellow, scale=2, texture='sun.jpg')
earth = Entity(parent=sun, model="sphere", scale=0.4, position=(1,0,1), texture='earth.jpg')
moon = Entity(parent=earth, model="sphere", scale=0.3, position=(0.5,0,0.5), color=color.white)

l = [sun, earth, moon]

app.run()