62 lines
1.6 KiB
Python
62 lines
1.6 KiB
Python
import matplotlib.animation as animation
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import matplotlib.cm as cm
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import matplotlib.pyplot as plt
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import numpy as np
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from physics import n_body
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def parse_csv(filename: str):
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with open(filename, 'r') as file:
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lines = file.read().strip().splitlines()
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pos = np.zeros((len(lines), 2))
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vel = np.zeros((len(lines), 2))
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rad = np.zeros((len(lines),))
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for i, [x, y, vx, vy, r] in enumerate(map(lambda l: map(float, l.split(',')), lines)):
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pos[i] = [x, y]
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vel[i] = [vx, vy]
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rad[i] = r
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return pos, vel, rad
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class Animator:
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def __init__(self, pos: np.ndarray, vel: np.ndarray, rad: np.ndarray):
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self.pos = pos
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self.vel = vel
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self.rad = rad
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self.mass = np.pi * 4 / 3 * rad ** 3
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self.scat = None
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self.colours = cm.rainbow(
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np.random.random(
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(len(self.rad),)
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)
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)
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self.fig, self.ax = plt.subplots()
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self.ani = animation.FuncAnimation(
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self.fig,
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self.update,
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interval=1000/120,
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init_func=self.setup_plot,
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blit=True,
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cache_frame_data=False
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)
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def setup_plot(self):
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self.scat = self.ax.scatter(
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self.pos[:, 0],
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self.pos[:, 1],
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c=self.colours,
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s=self.rad * 10
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)
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self.ax.axis([-950, 950, -500, 500])
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return self.scat,
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def update(self, *_args, **_kwargs):
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n_body(self.pos, self.vel, self.mass)
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self.scat.set_offsets(self.pos)
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return self.scat,
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def show(self):
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plt.show()
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