[ bzflag-Patches-485796 ] reduce number of MsgGrab msgs

[<no...@so...>]

Patches item #485796, was opened at 2001-11-26 14:08
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Category: BZFlag
Group: None
>Status: Closed
>Resolution: Accepted
Priority: 6
Submitted By: Frank Thilo (chestal)
Assigned to: Tim Riker (timriker)
Summary: reduce number of MsgGrab msgs

Initial Comment:
Whenever a tank drives over a flag it sends a MsgGrab
message to the server. When the server thinks it is ok
for the player to have the flag, it responds with
another MsgGrab message. Due to network latency the
client may send additional MsgGrab pleas before the
server reply is received. On average lag / framerate
messages will be sent, where lag is round-trip time for
the messages. For very fast clients with high
framerates and some lag this can cause lots of messages
to be sent for a single flag (e.g. framerate = 200 fps
 and lag = 500ms -> 100 messages).

Obviously, this is not a good idea. My patch fixes this
with a simpel heuristic. As usual, all flags are
checked for being pickup-able and a MsgGrab msg is sent
for each for which this holds true (usually none or a
single flag, but on rare ocassions, it might be 2 or
mroe flags). After that, no more MsgGrab msgs will be
sent for another 0.2 seconds. So, at most 5 messages
per second will be sent; depending on the lag, no more
than 1 or 2 messages will be sent for most players. The
constant 0.2s was chosen arbitrarily. Increasing it
reduces the number of messages, but making it too large
could affect gameplay.

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>Comment By: Tim Riker (timriker)
Date: 2001-11-26 14:37

Message:
Logged In: YES 
user_id=8134

was not against CVS.... ;-) applied anyway.

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