Gravity Simulation

This is a small python script made with pygame-ce and numpy to simulate Newton gravity. This originally started as a random project i just wanted to do. Now it hosts ~1000 lines of messy undocumented code that only 3am me is able to decipher. But it has turned out kind of nice. No bugs i think and i really love the ui/ux. I mean i hope its as intuitive as i think it is

Controls

button	action
Space	pause / unpause
R	reset simulation / velocity
H	toggle overlay
F11	toggle fullscreen
Esc	Exit
Mouse Left	change position
Mouse Right	change velocity
Mouse Left + Right	change radius
Wheel	change camera zoom / grid size
Wheel Click	add / remove ball
ctrl	snap to grid

Usage

If you are on Windows the fastest way is to head to the releases page on the right and download the lastest exe

Note that the .exes are made with autopytoexe and will trigger Defender for seeming malicous. This is a common issue i cant solve. https://www.reddit.com/r/learnpython/comments/e99bhe/why_does_pyinstaller_trigger_windows_defender/

If you are not on Windows or you just want to use the latest bleeding edge version, here are some steps:

• Dowload the repo git clone https://github.com/p1geondove/grav-sim
• Move into repo cd grav-sim
• create python env python -m venv .venv
• Optional: upgrade pip
  • Windows .venv\Scripts\python.exe -m pip install --upgrade pip
  • Linux .venv/bin/python.exe -m pip install --upgrade pip
• install requirements
  • Windows .venv\Scripts\pip.exe install -r requirements.txt
  • Linux .venv/bin/pip install -r requirements.txt
• launch
  • Windows .venv\Scripts\python.exe main.py
  • Linux .venv/bin/python main.py

I dont have a mac so i dont know what the process there is, but probably very similar

Sample Footage

TODO

Implement other solvers

Add more start orbits

Find and solve bugs