-
Notifications
You must be signed in to change notification settings - Fork 0
/
solar.py
126 lines (102 loc) · 3.94 KB
/
solar.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
import pygame as pg
from pygame.locals import *
import sys
import math
pg.init()
WIDTH = 800
HEIGHT = 800
display = pg.display.set_mode((WIDTH, HEIGHT))
pg.display.set_caption("Solar System")
pg.mouse.set_visible(False)
font = pg.font.get_default_font()
FONT = pg.font.Font(font, 14)
clock = pg.time.Clock()
G = 6.6743e-11
AU = 1.496e11
TIMESTEP = 3600*24
SCALE = 50 / AU
class Planet():
def __init__(self, x, y, name, mass, radius, color, sun, initial_v_x):
self.x = x
self.y = y
self.name = name
self.mass = mass
self.radius = radius
self.color = color
self.sun = sun
self.dis_to_sun = 0
self.v = pg.Vector2()
self.v.x = initial_v_x
self.line_points = []
def calc_distance(self, p2):
d = math.sqrt((p2.x - self.x)**2 + (p2.y - self.y)**2)
if p2.sun:
self.dis_to_sun = d
return d
def calc_angle(self, p2):
dx = p2.x - self.x
dy = p2.y - self.y
angle = math.atan2(dy, dx)
return angle
def update_pos(self, planets):
total_fx, total_fy = 0,0
for planet in planets:
if planet == self:
continue
else:
d = self.calc_distance(planet)
angle = self.calc_angle(planet)
force = G * self.mass * planet.mass / d**2 # F = ma
fx = force * math.cos(angle)
fy = force * math.sin(angle)
total_fx += fx
total_fy += fy
self.v.x += total_fx / self.mass * TIMESTEP
self.v.y += total_fy / self.mass * TIMESTEP
self.x += self.v.x * TIMESTEP
self.y += self.v.y * TIMESTEP
self.line_points.append((self.x,self.y))
def draw(self):
x = self.x * SCALE + WIDTH / 2
y = self.y * SCALE + HEIGHT / 2
if len(self.line_points) > 2:
if len(self.line_points) > 15000:
self.line_points = self.line_points[1:]
scaled_points = []
for point in self.line_points:
px, py = point
px = px * SCALE + WIDTH / 2
py = py * SCALE + HEIGHT / 2
scaled_points.append((px,py))
pg.draw.lines(display, self.color, False, scaled_points, 2)
pg.draw.circle(display, self.color, (x, y), self.radius)
if not self.sun:
name_text = FONT.render(f"{self.name}", 1, (255,255,255))
distance_text = FONT.render(f"{round(self.dis_to_sun/1000, 1)}km", 1, (255,255,255))
display.blit(name_text, (x - name_text.get_width()/2, y - name_text.get_height()/2 - self.radius * 3))
display.blit(distance_text, (x - distance_text.get_width()/2, y + distance_text.get_height()/2 + self.radius))
def main():
running = True
planets = [Planet(0, 0, "Sun", 1.989e30, 15, (253, 184, 19), True, 0),
Planet(0, 1 * AU, "Earth", 5.972e24, 5, (107,147,214), False, 29.78e3),
Planet(0, 1.5 * AU, "Mars", 6.39e23, 3, (193,68,14), False, 24.08e3),
Planet(0, -0.7 * AU, "Venus", 4.867e24, 4, (165,124,27), False, -35.02e3),
Planet(0, -5.2 * AU, "Jupiter", 1.89813e27, 13, (227,220,203), False, -13.06e3)]
while running:
clock.tick(60)
keys = pg.key.get_pressed()
for event in pg.event.get():
if event.type == pg.QUIT:
running = False
pg.quit()
sys.exit()
if keys[K_ESCAPE]:
running = False
pg.quit()
sys.exit()
display.fill((0,0,0))
for planet in planets:
planet.update_pos(planets)
planet.draw()
pg.display.flip()
if __name__ == "__main__": main()