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Sorry, I don't know........<br /><blockquote type="cite">
<p>-------- Original-Nachricht --------<br />Datum: Fri, 3 Sep 2010 15:22:00 +0200<br />Von: Sven-Erik Tiberg <Sven-Erik.Tiberg@ltu.se><br />An: "'Christoph Valentin'" <christoph.valentin@gmx.at><br />CC: "x3d-public@web3d.org" <x3d-public@web3d.org>, Tom Sparks <tom_a_sparks@yahoo.com.au><br />Betreff: RE: [X3D-Public] XMPP or not XMPP<br /><br /></p>
<div align="left" dir="ltr"><span class="188111513-03092010"><font size="2" face="Arial" color="#0000ff">Hi Christoph </font></span></div>
<div align="left" dir="ltr"> <span class="188111513-03092010"><font size="2" face="Arial" color="#0000ff"></font></span> </div>
<div align="left" dir="ltr"><span class="188111513-03092010"><font size="2" face="Arial" color="#0000ff">About a dispatcher, do you think that ejabberd <a href="http://www.ejabberd.im/">http://www.ejabberd.im/</a> could be usefull? </font></span></div>
<div> <font size="2" face="Arial" color="#0000ff"></font> </div>
<div> <span class="188111513-03092010"></span><font face="Arial"><font color="#0000ff"><font size="2"><span class="188111513-03092010">On t</span><span class="188111513-03092010">he issue "only local on the mashine" my thought was to have a local grapical displayer of a simulation and a physical engine on the same mashine.</span></font></font></font> </div>
<div> <font><font color="#0000ff"><font size="2"><span class="188111513-03092010"></span></font></font></font><span class="188111513-03092010"></span><font face="Arial"><font color="#0000ff"><font size="2">G<span class="188111513-03092010">raphical display ( and interaction ) would be any X3D browser and physical engine could be a model running in a simulation engine.</span></font></font></font> </div>
<div> <font><font color="#0000ff"><font size="2"><span class="188111513-03092010"></span></font></font></font><font size="2" face="Arial" color="#0000ff"><span class="188111513-03092010">Anyone knowing if this could be done with AJAX or XMPP/jabber?</span></font> </div>
<div> <br /><span class="188111513-03092010"><font size="2" face="Arial" color="#0000ff">/Sven-Erik</font></span> </div>
<div lang="en-us" align="left" dir="ltr" class="OutlookMessageHeader"> <hr /> <font size="2" face="Tahoma"><strong>From:</strong> Christoph Valentin [mailto:<a href="http://service.gmx.net/de/cgi/g.fcgi/mail/new?CUSTOMERNO=28383878&t=de984413474.1283530394.4e583488&to=christoph.valentin%40gmx.at">christoph.valentin@gmx.at]</a> <br /><strong>Sent:</strong> den 2 september 2010 18:17<br /><strong>To:</strong> Sven-Erik Tiberg<br /><strong>Cc:</strong> <a href="http://service.gmx.net/de/cgi/g.fcgi/mail/new?CUSTOMERNO=28383878&t=de984413474.1283530394.4e583488&to=x3d-public%40web3d.org">x3d-public@web3d.org;</a> Tom Sparks<br /><strong>Subject:</strong> Re: [X3D-Public] XMPP or not XMPP<br /></font><br /> </div>
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Hi Sven-Erik<br /><br />Don't know much about simulation engines, but maybe can contribute "my two cent".<br /><br />> <span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">The intention are to use the same script for all transfere of states over the network or only local in the mashine.</font></span> <span class="yiv1888844435013381811-02092010"></span><br /><br />If you use TCP/IP for transmission, and if you assume an IP stack always being present, you can delegate the "local/remote" decision to the IP stack. Use "localhost"/127.0.0.1 as destination address and the "short cut" will be done by the IP stack (saving development effort on the cost of some additional computational overhead, keeping scripts simple).<br />I had a similar problem in the "SrrTrains" project, where I rely on the "EventStreamSensor" / "NetworkSensor" and I aimed to support single-player-mode without(!) collaboration server. Unfortunately, "EventStreamSensor"/"NetworkSensor" don't support "single-player-mode without collaboration server", but only "single-player-mode with collaboration server" (which is nothing else than a multi-player session, that hosts only one user accidentally). I had to implement some if()s to bypass "EventStreamSensor"/"NetworkSensor" in case of single-player-mode.<br /><br />> <span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">Primarily I'v taken the example to have a MU 3D space with many 3D clients and one or more servers. </font></span>
<div><span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">Secondly one computer hosting both a 3D Browser and a simulation/animation engine.</font></span></div>
<span class="yiv1888844435013381811-02092010"></span><br />So you have an m:n relationship between clients and servers. I assume, that servers will not be added or removed frequently, unless you add or remove models dynamically.<br /><br />Starting up and terminating clients will change the communication relations on the other hand, you will have to update all servers to tell them, to which addresses the states will have to be distributed.<br /><br />What about having a dispatcher in between, such that you have:<br /> m clients --- 1 dispatcher --- n servers<br /><br />Kind regards<br />Christoph<br /><blockquote type="cite">
<p>-------- Original-Nachricht --------<br />Datum: Thu, 2 Sep 2010 04:53:26 -0700 (PDT)<br />Von: Tom Sparks <a href="http://service.gmx.net/de/cgi/g.fcgi/mail/new?CUSTOMERNO=28383878&t=de984413474.1283530394.4e583488&to=%26lt%3Btom_a_sparks%40yahoo.com.au"><tom_a_sparks@yahoo.com.au></a><br />An: 'Christoph Valentin' <a href="http://service.gmx.net/de/cgi/g.fcgi/mail/new?CUSTOMERNO=28383878&t=de984413474.1283530394.4e583488&to=%26lt%3Bchristoph.valentin%40gmx.at"><christoph.valentin@gmx.at></a>, Sven-Erik Tiberg <a href="http://service.gmx.net/de/cgi/g.fcgi/mail/new?CUSTOMERNO=28383878&t=de984413474.1283530394.4e583488&to=%26lt%3BSven-Erik.Tiberg%40ltu.se"><Sven-Erik.Tiberg@ltu.se></a><br />CC: "<a href="http://service.gmx.net/de/cgi/g.fcgi/mail/new?CUSTOMERNO=28383878&t=de984413474.1283530394.4e583488&to=x3d-public%40web3d.org">x3d-public@web3d.org"</a> <a href="http://service.gmx.net/de/cgi/g.fcgi/mail/new?CUSTOMERNO=28383878&t=de984413474.1283530394.4e583488&to=%26lt%3Bx3d-public%40web3d.org"><x3d-public@web3d.org></a><br />Betreff: Re: [X3D-Public] XMPP or not XMPP<br /><br /></p>
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<td valign="top">--- On <strong>Thu, 2/9/10, Sven-Erik Tiberg <em><a href="http://service.gmx.net/de/cgi/g.fcgi/mail/new?CUSTOMERNO=28383878&t=de984413474.1283530394.4e583488&to=%26lt%3BSven-Erik.Tiberg%40ltu.se"><Sven-Erik.Tiberg@ltu.se></a></em></strong> wrote:<br /><blockquote style="padding-left: 5px; margin-left: 5px; border-left: 2px solid;"> <br />From: Sven-Erik Tiberg <Sven-Erik.Tiberg@ltu.se><br />Subject: Re: [X3D-Public] XMPP or not XMPP<br />To: "'Christoph Valentin'" <christoph.valentin@gmx.at><br />Cc: "x3d-public@web3d.org" <x3d-public@web3d.org><br />Received: Thursday, 2 September, 2010, 9:28 PM<br /><br />
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<div align="left" dir="ltr"><span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">Hi Christioph</font></span></div>
<div align="left" dir="ltr"> <span class="yiv1888844435013381811-02092010"></span> </div>
<div align="left" dir="ltr"><span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">The intention are to use the same script for all transfere of states over the network or only local in the mashine.</font></span></div>
<div align="left" dir="ltr"><span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">If local the script would transfere states between a X3Dbrowser and a simulation/animation engine on the same computer.</font></span></div>
<div align="left" dir="ltr"><span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">If MU the script will transfer states over the network to either another or many X3Dbrowser or / and one or more simulation/animation engine on one or many servers.</font></span></div>
<div> </div>
<div><span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">Primarily I'v taken the example to have a MU 3D space with many 3D clients and one or more servers. </font></span></div>
<div><span class="yiv1888844435013381811-02092010"><font size="2" face="Arial" color="#0000ff">Secondly one computer hosting both a 3D Browser and a simulation/animation engine.</font></span></div>
<div> <span class="yiv1888844435013381811-02092010"></span> </div>
<div><font size="2" face="Arial" color="#0000ff"><span class="yiv1888844435013381811-02092010">If it's possible to use js or ajax as a network extension to any 3D Browser I will get a cace and celibrate with my collegues.</span></font></div>
<div><font size="2" face="Arial" color="#0000ff"><span class="yiv1888844435013381811-02092010">A dinner when we got the MU running and guess what when we got a MU with simulation engines runing. :)</span></font></div>
<div> <font size="2" face="Arial" color="#0000ff"><span class="yiv1888844435013381811-02092010"></span></font> </div>
<div><font size="2" face="Arial" color="#0000ff"><span class="yiv1888844435013381811-02092010">/Sven-Erik </span></font></div>
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<div> there is a catch in simulation/animation engine that are server side<br />you'll need to use something like <span style="font-weight: bold;"></span>Discrete Event Simulation (<a href="http://www.cs.brown.edu/~scd/world/sim.html)">http://www.cs.brown.edu/~scd/world/sim.html)</a><br /><br />tom<br /> </div>
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