# PathSim

> PathSim is a Python framework for simulating dynamical systems using block diagrams. Build, simulate, and analyze continuous-time, discrete-time, and hybrid systems.

## Overview

PathSim provides Python-native system modeling with intuitive block diagrams. From simple ODEs to complex multi-domain simulations.

Install: `pip install pathsim` or `conda install -c conda-forge pathsim`

## Features

- **Hot-Swappable**: Switch blocks and solvers during active simulation at runtime.
- **MIMO Capable**: Multiple input, multiple output ports built into all blocks.
- **30+ Solvers**: Implicit, explicit, and adaptive integrators for stiff and non-stiff systems.
- **Hierarchical**: Nested subsystems for modular, reusable component design.
- **Event Handling**: Zero-crossing detection and scheduled events for hybrid systems.
- **Extensible**: Create custom blocks by subclassing the base Block class.
- **Browser Editor**: Design and simulate visually with PathView using Pyodide.
- **Domain Toolboxes**: Specialized blocks for chemical, vehicle, flight, and RF engineering.

## Ecosystem

- [PathSim](https://github.com/pathsim/pathsim): Core simulation framework — [Docs](https://docs.pathsim.org/pathsim) — [PyPI](https://pypi.org/project/pathsim)
- [PathSim-Chem](https://github.com/pathsim/pathsim-chem): Chemical engineering blocks — [Docs](https://docs.pathsim.org/chem) — [PyPI](https://pypi.org/project/pathsim-chem)
- [PathSim-Vehicle](https://github.com/pathsim/pathsim-vehicle): Vehicle dynamics blocks — [Docs](https://docs.pathsim.org/vehicle) — [PyPI](https://pypi.org/project/pathsim-vehicle)
- [PathSim-Flight](https://github.com/pathsim/pathsim-flight): Flight dynamics blocks — [Docs](https://docs.pathsim.org/flight) — [PyPI](https://pypi.org/project/pathsim-flight)
- [PathSim-RF](https://github.com/pathsim/pathsim-rf): RF engineering blocks — [Docs](https://docs.pathsim.org/rf) — [PyPI](https://pypi.org/project/pathsim-rf)
- [PathView](https://view.pathsim.org): Browser-based visual block diagram editor

## Links

- [Homepage](https://pathsim.org)
- [Documentation](https://docs.pathsim.org)
- [PathView Editor](https://view.pathsim.org)
- [GitHub Organization](https://github.com/pathsim)
- [JOSS Paper](https://doi.org/10.21105/joss.07484)
- [Sponsor](https://github.com/sponsors/milanofthe)