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Tank Simulation

Started by Aiursrage2k Jan 9, 2007 at 2:51 PM 0 replies 1.4k views

Original Post

Jan 9, 2007 at 2:51 PM

I am trying to create a multiplayer tank arena game. ***** My first idea was to do this: ->Clients send data to server ->Server waits for all clients. It then updates the world. ->The server then sends the data to the clients. The client would only have to render the world. ->If the waiting is too long we can boot the client from the server (ala warcraft3/starcraft). The problem with that (I imagine) is that it would be too slow, since the usual ping across a network would be ~200ms/5 frames a second. *** I started reading up on dead recokoning, but I am not sure if what I have is right... No need a server, its peer to peer. Each frame ->The client will update the entities in the world (excluding all tanks not owned by the player). ->The second update, the client will update all the tanks and an imaginary tank (owned by the player) using the last known pdu. If the values of the imgainary tank and the real tank differ too greatly then the a new pdu will be sent out. The reason there there is two updates. We dont want the client to produce a collison (for a entity it doesnt own) that is provided by inaccurate values (IE out date pdu).

hplus0603

Jan 11, 2007 at 5:50 PM

This question is asked every week on this forum.

We've tried to answer it in the Forum FAQ, but the area is so big, that I fear it's hard to answer it in such a way that someone looking for "the answer" will know that that's what he needs to read.

In general, the first model is the "lockstep" model, and works well if you can hide the command latency (such as in an RTS).

The second model is exactly the DIS networking model. It works for local-area peer-to-peer simulations, to some extent, but has problems with long-haul networking, and has problems with the verifiability of the simulation -- i e, hacking/cheating.

For more information, please read some of the resources pointed at by the Forum FAQ, such as the quake and unreal networking models, and the "1500 archers" article.

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