This is HOT4D based on Houdini Ocean Toolkit. (see below) Thanks to Drew Whitehouse.
Original readMe.txt :
This is the source code for the Houdini Ocean Toolkit.
For licensing details see the file LICENSE.txt.
The toolkit leverages the following open source toolkits which are covered by their own individual license terms.
For documentation etc start by looking at -
http://www.odforce.net/wiki/index.php/HoudiniOceanToolkit
The source is maintained at
http://code.google.com/p/houdini-ocean-toolkit/
Drew Whitehouse ANU Supercomputer Facility June 2005,2009