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PandaEPL is a cross-platform spatial navigation experiment programming library. It supersedes PyEPL's VR module, although PyEPL is still recommended for programming experiments with 2D stimuli. Technical details and sample usage are described in a forthcoming paper.

At minimum, PandaEPL requires:

Sound playback and recording are supported by interfacing with the Snack library. Joystick input is supported by interfacing with PyGame. Both libraries are optional and are required only if you wish to use the corresponding features.


After installing the above dependencies, you may download PandaEPL by clicking here. Installation is simple and makes use of Python's standard Distutils mechanism. From a command prompt, navigate to the unzipped directory and type:

python install

On Mac OS X and Microsoft Windows, replace python with ppython to call the version of Python which ships with Panda3D.

If you wish to use the ActiveWire card to synchronize multiple computers, and you have the appropriate drivers installed, you may substitute with to also install the ActiveWire interface library. The included version of the ActiveWire library is only supported on Mac OS X.

Snack Library

We have fixed several bugs found in the latest release of the Snack library (the version currently found on the author's website). To download our lab's modified version of Snack, click here. As is the case with PandaEPL and the sample experiment below, we do not provide any guarantees regarding this software.

Sample Experiment

The sample experiment outlined in the forthcoming PandaEPL paper may be downloaded by clicking here (~55mb). Refer to the included README file for instructions.


PandaEPL and the sample experiment are distributed under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 2.1 of the License, or (at your option) any later version.