https://github.com/behrouzz/gravitational
https://github.com/behrouzz/gravitational
Last synced: 6 months ago
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- Host: GitHub
- URL: https://github.com/behrouzz/gravitational
- Owner: behrouzz
- License: mit
- Created: 2021-02-14T12:31:14.000Z (over 5 years ago)
- Default Branch: main
- Last Pushed: 2023-04-24T11:54:25.000Z (about 3 years ago)
- Last Synced: 2025-09-28T03:26:47.612Z (9 months ago)
- Language: Python
- Size: 122 KB
- Stars: 3
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
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README
**Author:** [Behrouz Safari](https://behrouzz.github.io/)
**License:** [MIT](https://opensource.org/licenses/MIT)
# gravitational
*A package for gravitational simulations*
## Installation
You can install the latest version of *gravitational* from [PyPI](https://pypi.org/project/gravitational/):
pip install gravitational
The only requirements are *numpy* and *matplotlib*.
## How to use
An example of simulating the inner planets:
```python
from gravitational.simulation import Simulation
from gravitational.solar_system import initial_state
from gravitational.constants import Constant
# Define the time as a datetime object or a string (default now)
t = '2021-02-17 04:26:00'
sim = Simulation(t)
c = Constant()
# Get initial states from Horizons API
p0_sun, v0_sun = initial_state('sun', t)
p0_venus, v0_venus = initial_state('venus', t)
p0_earth, v0_earth = initial_state('earth', t)
# Add bodies
s = sim.add_body(name='Sun', color='y', size=25, mass=c.m_sun,
position=p0_sun, velocity=v0_sun)
v = sim.add_body(name='Venus', color='k', size=8, mass=c.m_venus,
position=p0_venus, velocity=v0_venus)
e = sim.add_body(name='Earth', color='b', size=10, mass=c.m_earth,
position=p0_earth, velocity=v0_earth)
# Run and play the simulation
sim.play(path=True)
```