# C4dynamics
**Repository Path**: RexHuang936/C4dynamics
## Basic Information
- **Project Name**: C4dynamics
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 0
- **Created**: 2026-07-19
- **Last Updated**: 2026-07-19
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
Published in the Journal of Open Source Software (JOSS)
# Tsipor Dynamics
## Algorithms Engineering and Development
Tsipor (bird) Dynamics (c4dynamics) is the Python framework for state-space modeling and algorithm development.
### **Stop starting from scratch every time you change systems**
**Same workflow. Different systems.**
> Most engineers rebuild everything.
> **c4dynamics keeps the structure fixed.**
---
## What is c4dynamics?
**c4dynamics** is a Python framework for building, simulating, estimating, and controlling physical systems
— without resetting your workflow every time the system changes.
It gives you one consistent way to:
* define a system
* simulate its evolution
* estimate its state
* design control
Across:
> robotics · aerospace · autonomous systems · navigation
---
---
## 🧪 Examples
**Real implementations of modeling, estimation, and control**
> These are not isolated demos.
> They all follow the same structure.
| [6-DOF Simulation](https://c4dynamics.github.io/c4dynamics/programs/pn_guidance/dof6sim.html) | [Extended Kalman Filter](https://c4dynamics.github.io/c4dynamics/programs/ballistic_ekf/ballistic_coefficient.html) | [YOLO + Kalman Filter](https://c4dynamics.github.io/c4dynamics/programs/car_tracker/car_tracker.html) | [Model Predictive Control](https://c4dynamics.github.io/c4dynamics/programs/mpc_steering/mpc_steering.html) | [Quadcopter Cascade PID](https://c4dynamics.github.io/c4dynamics/programs/pid_cascade/quadcopter_pid.html) |
|:-:|:-:|:-:|:-:|:-:|
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| Proportional navigation guidance | Ballistic coefficient estimation | Vehicle tracking | Vehicle steering | Figure-8 trajectory tracking |
---
## The switching problem
Switching systems shouldn’t feel like starting over.
But it does:
* new models
* new simulation structure
* new estimation logic
* new control pipeline
You don’t just learn new physics.
> **You rebuild everything.**
---
## The workflow
> **Keep the workflow. Change the physics.**
c4dynamics enforces a consistent structure:
```
define → simulate → estimate → control
```
So when the system changes:
> your thinking doesn’t.
---
## Core principle
> **Physics first. Programming second.**
* Code implements
* Models define reality
* Algorithms follow structure
---
## What you get
* state-based modeling primitives
* simulation infrastructure
* Kalman / Extended Kalman filters
* sensor and detection modules
* reinforcement learning environments
* OpenCV / Open3D integration
* Monte Carlo simulation support
---
## Who this is for
* control engineers
* robotics engineers
* aerospace engineers
* autonomy developers
Especially if you’ve felt:
> “I know this stuff… but I don’t use it.”
---
## Quickstart
```python
>>> import c4dynamics as c4d
```
# define system
```python
s = c4d.state(y=1, vy=0.5)
```
# simulate
```python
F = [[1, 1],
[0, 1]]
s.X += F @ s.X
s.store(t=1)
```
## Requirements
- 3.8 <= Python < 3.13
- Required packages are listed in [requirements.txt](requirements.txt)
---
## Installation
For detailed instructions on installing c4dynamics, including setup for virtual environments, Python version requirements, and troubleshooting, refer to the [c4dynamics setup guide](https://github.com/c4dynamics/c4dynamics/blob/main/docs/source/tutorials/setup_guide.ipynb).
* [PIP](https://pypi.org/project/c4dynamics/)
```
>>> pip install c4dynamics
```
* [GitHub](https://github.com/c4dynamics/c4dynamics)
To run the latest GitHub version, download the repo and install required packages:
```
>>> pip install -r requirements.txt
```
---
## Documentation
📘 https://c4dynamics.github.io/c4dynamics/
* concepts
* API
* examples
* tutorials
---
## Contributing
This is not just a library.
It’s a shared way of building systems.
* build examples
* improve structure
* explore new systems
---
## Support
If you encounter problems, have questions, or would like to suggest improvements,
please open an Issue in this repository.
---
> **New system. Same workflow.**
---
