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  DatagramPacket contents...  (Read 1043 times)
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Offline MickeyB

Senior Member




my game will work, my game will work!


« Posted 2003-05-08 20:48:10 »

a UDP packet has the data(bytes[]) and data length(int length)
of course there is the problem in that ints over 128(or 255) can't be a byte.  I need to send x,y position and rotation, clientID, etc... the usualstuff.  
Can a datagram packet hold data[][]l, in order to send an int converted to a byte array?

How do you guys send locational info to clients?


M

MickeyB

Current Project: http://www22.brinkster.com/mbowles/
Offline leknor

Junior Member




ROCK!!!


« Reply #1 - Posted 2003-05-08 21:26:04 »

An octet (aka: byte) is the unit of data transfer on ther internet and most other network techonoliges. It's your job to convert between your data and a series of bytes.

Being that I like NIO I'd do something like:
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byte[] data = ...; // from the UDP packet
java.nio.ByteBuffer bb = ByteBuffer.wrap(data);
int x = bb.getInt();
int y = bb.getInt();


Another way would be to wrap the data array in a java.io.ByteArrayInputStream and wrap that in a java.io.DataInputStream and then use the readInt() method.

I think but have no real proof that the NIO method is more efficient but without testing I don't know.
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