FDTDX vs OpenSim
FDTDX
fdtdx.readthedocs.ioOpenSim
opensim.stanford.eduSide by side
| Figure | FDTDX | OpenSim |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Physics Simulation Software | 8.6 (#12) | 8.7 (#6) |
| Audience | The project presents FDTDX for research, development, and commercial use in photonic nanostructure simulation and design. | The project describes OpenSim as suitable for research and teaching and welcomes academic and commercial applications. |
| Authoring tools | Yes | Yes |
| Data export | Yes | Yes |
| Delivery mode | desktop | desktop |
| Free plan | Yes | Yes |
| Lesson library | No | Yes |
| Purpose | FDTDX is an open-source Python package for simulating and designing three-dimensional photonic nanostructures with the Finite-Difference Time-Domain method. | OpenSim models humans, animals, robots, and the environment, and simulates their interaction and movement. |
| Security | The repository page lists a Security and quality section but does not state a security certification or compliance standard. | The pages reviewed describe OpenSim's software licenses but do not state security certifications or compliance programs. |
| Support | The FAQ invites users to open GitHub discussions for unanswered questions and issues for suspected bugs, and says the maintainers regularly check discussions. | OpenSim provides documentation, tutorials, and a discussion forum where users can seek help from experts. |
| 3D visuals | Yes | Yes |
Plans
In their own words
OpenSim
OpenSim models and simulates how humans, animals, robots, and their environment move and interact. Its graphical interface displays models and supports creating and analyzing simulations. Models can contain rigid bodies, joints, constraints, contact, muscles, and other actuators. Movement analysis tools include inverse kinematics, inverse dynamics, static optimization, and forward dynamics; Computed Muscle Control can generate muscle-driven forward simulations. The API is usable through Matlab, Python, Java, and C++, and GUI scripting uses an embedded Jython shell. Plugins can add analyses and model components, but must be built for the same OpenSim version and platform. The graphical interface is distributed for 64-bit Windows and Mac, while there is no public Linux GUI distribution; the API source can be built for Linux. OpenSim is free and open source under Apache 2.0, though models, examples, and plugins may have separate licenses. It is intended for research and teaching and welcomes academic and commercial applications. Documentation, tutorials, and a discussion forum are available. Downloading requires a SimTK account.