https://github.com/larsfriese/physics-engine-python

Explains the basics of a physics engine using python.
https://github.com/larsfriese/physics-engine-python

Last synced: 11 months ago
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Explains the basics of a physics engine using python.

• Host: GitHub
• URL: https://github.com/larsfriese/physics-engine-python
• Owner: larsfriese
• Created: 2023-06-13T19:05:36.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2023-11-28T01:18:33.000Z (about 2 years ago)
• Last Synced: 2025-01-05T08:55:15.569Z (about 1 year ago)
• Language: Python
• Size: 283 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# Physics engine basics in python

(Project is still in work)

This project is a summary of the key concepts I learned in the field of physics engines.

The code for this is done in python, using the [pygame](https://www.pygame.org/news) library for visualization. I use python because the syntax is easy to understand.

I summarised the theory in a series of PDFs, which can be found in the [pdfs](pdfs) folder.

#### Tutorial PDFS:

1. [Intro / Solving ODEs](pdfs/1_intro.pdf)

2. [Constraints](pdfs/2_constraints.pdf)

3. Rigid Bodies

## Examples of the physics engine in action:

All of these examples are interactable. You can click to create temporary springs that drag the particles around.

#### Triple Pendulum:

![Alt Text](recordings/triple_pendulum.gif)

- Triple pendulum simulation using constraints only

- Link: [pendulums/triple_pendulum.py](pendulums/triple_pendulum.py)

#### Chaotic behaviour of a double pendulum:

![Alt Text](recordings/chaotic_double_pendulum.gif)

- Visualization of how a slight change in initial conditions can lead to a completely different trajectory

in a double pendulum (also using constraints only)

- Link: [pendulums/chaotic_double_pendulum.py](pendulums/chaotic_double_pendulum.py)

#### Particles constrained to functions:

![Alt Text](recordings/particles_constrained_to_functions.gif)

- Particles constrained to "rails" which have the shape of a function

- In this Example f(x) = sin(x) and g(x) = x

- Link: [function_constraints.py](function_constraints.py)