BILL SELLERS
GaitSym is a forward dynamic modelling program. What that means is that you specify the forces and the program uses Newton's Laws to calculate the movements. You can download it from here including a range of human and non-human 2D and 3D models to get you started. It uses the Open Dynamics Engine physics engine to do most of the hard work and provides a file format and display system so the user does not have to do any programming. It also provides various muscle models so that the forces can be generated directly from muscle activation levels and a number of hooks to allow it to be used with global optimisation tools such as genetic algorithms.
The software is open source and is released under the GNU General Public License version 3.0 licence except for parts of the software that are covered by different licences (for example the OpenDE portions are covered by either Lesser GPL or a BSD license). If this license does not let you do what you want to do then please contact me and I am sure I can sort something out.
Features
- Fast, Flexible and Robust Forward Dynamic Modeller
- Sophisticated Contact System
- Minetti-Alexander and Umberger-Gerritsen-Martin Muscle Models for Metabolic Cost Estimation
- Via Points and Cylinder Wrapping for Muscle Paths
- Inertial Tensor Calculated from Triangular Mesh Outline
- World or Local Coordinate Systems for Efficient Model Creation
- Full Source Code Included (C++ compiles on MacOSX, Windows, Linux and other Unix systems)
- Complete with a Variety of Human and Non-human 2D and 3D models
- Produces High Quality Stills and Animations via External Ray-tracing
New Features for Version 2.0
- Complete revamp of user interface using Qt for cross platform support
- Command line no longer necessary to run models
- 3D Data cursor for quicker data capture from bone scans
- Much faster rendering allowing quick interaction with highly complex models
- Extended data output options and better documentation
- Improved data matching support
You can download an archive file containing the full source, documentation, sample models and precompiled binaries for MacOSX and Windows here:
- Complete (source + binaries + documentation + models) GaitSym_2.0.0.zip (61MB)
- Window binaries GaitSymGUI.zip (14.2MB)
- MacOSX binaries GaitSymGUI.dmg (13.6MB)
- Documentation GaitSym Manual v2.pdf (616kB)
- Models
Alternatively you can browse the individual files here. If just want to try it out then you will need the binaries and a model or two to run. The documentation might be a good idea too since there are a few gotchas.
