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@Spirit: Update ranges can be programmed so easy! Just use vec_dist() and only send the new position if the distance isn't to big.
The problem with implenting death reckoning is, that you need an other death reckoning algorithm for racing games than for mmorpgs or an shooter.
Also death reckoning shouldn't be a problem for more experienced programers. There are a lot of good tutorials in the internet.
@Helghast:
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