On Wed, Sep 5, 2012 at 5:34 PM, Jan Comans wrote: > We did have one issue tough with our setup. Since we run three different > instances on three different machines, we got clouds which weren't > consistent across the screen. We fixed this with a small hack in the random > number generator and the cloud rendering code.
Hi Jan, I'm the author of the 3D clouds code. Thanks very much for highlighting the random number generator problem, and for your fix. I haven't had the chance to look at your fix beyond viewing the diffs, but at first glance I'm slightly surprised it works across multiple machines/instances. I would expect that differences in initialization time would mean that at any given moment in time some instances would have made more calls to mt_rand than others, resulting in different generated numbers, even if they all started with the same seed. Is this something you've had to resolve, or is it simply not an issue because the only calls that truly matter are the initial calls to determine cloud placement? I'm currently up to my elbows in the random buildings code, but once I've completed that job I will look at your fix in more detail and work out how best to integrate it. Thanks, -Stuart ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
