Open-DIS. Open Source Distributed Interactive Simulation. Don McGregor (mcgredo at nps dot edu) Don Brutzman (brutzman at nps dot edu)

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1 Open-DIS Open Source Distributed Interactive Simulation Don McGregor (mcgredo at nps dot edu) Don Brutzman (brutzman at nps dot edu)

2 Open-DIS Java implementation C++ implementation C# implementation Language implementations for Enumerated Bit Values (EBV) Integration with other programs: Delta3D Darkstar X3D iphone/windows/osx/unix DIS-KIT, discrete event simulation integrated with DIS Assorted tools for recording, playback, etc.

3 Open-DIS Downloads of pre-packaged releases averaging /mo; in addition to those from source code control Significant contributions from the community: C# implementation, C++ implementation of enumerations Use of XML template format worked out well in porting to new languages Non-viral open source license (BSD) key to success

4 Availability Source code control, forums, mailing lists. Finally, an open source implementation of one of the major DoD M&S standards

5 Delta3D Integrated into Delta3D Demo night: Delta3D, X3D, Darkstar, iphone, X3D Recorder/Playback and MRT-3 (SH-60 ASW trainer) cooperating over DIS MRT-3 is using another implementation of DIS, so we re not just talking to ourselves We can now plug all the MOVES software projects together

6 Darkstar Darkstar is an massively multiplayer online game (MMOG) toolkit from Sun Still immature, but interesting We can use the DIS protocol with the Darkstar server to create large-ish simulations, on the order of a few hundred to about a thousand simultaneous entities, and persistent online entities. Goal of scaling to tens of thousands using server-side clusters, while maintaining compatibility with existing DIS or HLA applications to preserve DoD investment in existing software See Tariq Rashid thesis work, SISO paper

7 Darkstar Darkstar provides persistent online entities, communications infrastructure, and more Can act as a server hub to relay DIS, host entities on the server side, and be a central point for doing DDM/area of interest management, or simply act as a DIS peer Open source & free Ideal outcome: Darkstar able to scale to tens of thousands of entities OK outcome: can use is as server-side infrastructure for several hundred constructive entities, and that is within reach now

8 Darkstar Dark Star DIS Simulator DIS Simulator Darkstar can act as a conventional federate in a DIS or HLA simulation, or in the case of DIS act as a complete server-centric hub IETF is also doing work on MMOGs, mostly based off of Second Life

9 iphone Subset of Open-DIS running on iphone as a proof of concept, goal of full implementation should be easily achievable. Uses iphone GPS, can access accelerometers, compass, etc Interesting project: integrate as a live element in a LVC simulation Advanced mobile platforms are about at the level of early 90 s PCs, and DOOM was running on early 90 s PCs

10 iphone Can use GPS, potential future capture of video, audio, accelerometer, compass data Portable lineman s phone for DIS? Handheld DoD apps? Open-GL present on iphone for 3D content

11 X3D-Edit A tool for writing X3D Also has integrated Open-DIS so you can test networking while building X3D scenes Includes DIS recorder/playback See it at demo night

12 XML Interesting feature of the Java code: we can marshal IEEE DIS to an XML format Another interesting feature: we can represent that XML in less space than the original binary IEEE DIS using Efficient XML Interchange (EXI) DIS-XML in EXI format is about 20% smaller than the IEEE format binary and is competitive with some gzipped binary data Implications for future DoD protocols: you can use XML as the native protocol format and still send messages in about the same size as binary formats if you re willing to accept some more processing overhead on the end nodes See Sheldon Snyder thesis, SISO paper

13 EXI and Network Protocols Existing: Custom Format Binary Protocol Problem: no one outside your community understands the binary format Alternative: XML in EXI Format Everyone understands XML

14 Future Work DIS 200x: The next major revision of the standard. It would be wonderful to have an open source implementation ready to go at approval HLA: Hook up an HLA-DIS bridge using RPR-FOM and Portico (an open source HLA RTI) Scalability tests using Darkstar, DIS, and HLA Integration with mobile platforms, mobile sim + DoD M&S standards, DoD standards + MMOG Should track IETF standards work on MMOG s Make Doing It Righ the path of least resistance